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? semiconductor components industries, llc, 2009 june, 2009 ? rev. 0 1 publication order number: NCP5393B/d NCP5393B 2/3/4-phase controller for cpu applications the NCP5393B is a multiphase synchronous buck regulator controller designed to power the core and northbridge of an amd microprocessor. the controller has a user configurable two, three, or four phase regulator for the core and an independent single phase regulator to power the microprocessor northbridge. the NCP5393B incorporates differential voltage sensing, differential phase current sensing, optional load ? line voltage positioning, and programmable v dd and v ddnb offsets to provide accurately regulated power parallel ? and serial ? vid amd processors. dual ? edge multiphase modulation provides the fastest initial response to dynamic load events. this reduces system cost by requiring less bulk and ceramic output capacitance to meet transient regulation specifications. high performance operational error amplifiers are provided to simplify compensation of the v dd and v ddnb regulators. dynamic reference injection further simplifies loop compensation by eliminating the need to compromise between response to load transients and response to vid code changes. features ? meets amd?s hybrid vr specifications ? up to four v dd phases ? single ? phase v ddnb controller ? dual ? edge pwm for fastest initial response to transient loading ? high performance operational error amplifiers ? internal soft start and slew rate limiting ? dynamic reference injection (patent #us07057381) ? dac range from 12.5 mv to 1.55 v ? 0.6% dac accuracy from 0.8 v to 1.55 v ? v dd and v dd offset ranges 0 mv ? 800 mv ? true differential remote voltage sense amplifiers ? phase ? to ? phase i dd current balancing ? differential current sense amplifiers for each phase of each output ? ?lossless? inductor current sensing for v dd and v ddnb outputs ? supports load lines (droop) for v dd and v ddnb outputs ? oscillator range of 100 khz ? 1 mhz ? tracking over voltage protection ? output inductor dcr ? based over current protection for v dd and v ddnb outputs ? guaranteed startup into precharged loads ? temperature range: 0 c to 70 c ? this is a pb ? free device applications ? desktop processors ? server processors ? high ? end notebook pcs http://onsemi.com marking diagram device package shipping ? ordering information ?for information on tape and reel specifications, including part orientation and tape sizes, please refer to our t ape and reel packaging specifications brochure, brd8011/d. a = assembly location wl = wafer lot yy = year ww = work week g = pb ? free package 148 qfn48, 7x7 case 485aj NCP5393B awlyywwg 1 NCP5393Bmnr2g qfn48 (pb ? free) 2500 / tape & reel
NCP5393B http://onsemi.com 2 1 48 vcca figure 1. pinout gnd comp fb droop vs+ vs ? offset diffout vfix 12vmon psi_l vid1 vid0 nb_comp nb_droop nb_vs+ nb_vs ? nb_offset nb_diffout rosc vid5 vid4 cs1 cs1n cs2 cs2n cs3 cs3n cs4 cs4n ilim vccb nb_cs nb_csn g1 g2 g3 g4 nb_g drvon nb_drvon pwrgood svd/vid2 svc/vid3 enable pwrok nb_fb
NCP5393B http://onsemi.com 3 figure 2. NCP5393B block diagram vcca + ? 5v uvlo 4.25v/4.05v pvi/svi hybrid interface + ? vs ? vs+ diffout + ? fb comp 1.3 v diff amp error amp vdd oscillator ilim enable + ? ilimit_vdd v dd regulator fault logic 3 ? phase detection and monitor circuits + + cs1 cs1n cs2 cs2n cs3 cs3n + ? gain = 6 + ? gain = 6 + ? gain = 6 + droop amplifier + ? gain = 6 cs4 cs4n + g4 vdd_dac vs+ ovp drvon gnd vid0 vid1 vid2/svd vid3/svc vid4 vid5 12vmon + ? 12v uvlo 8.5v/7.5v 1.3 v droop pwrok nb_offset offset vdd_dac out ilimit_nb = ilimit_vdd/n (n = vdd phase count) flag pwrgood gain = 1 rosc + ? pwm4 + ? pmw3 + ? pwm1 + ? pwm2 g1 g2 g3 + ? nb_vs+ nb_vs ? nb_diffout + ? nb_fb nb_comp 1.3 v diff amp error amp nb oscillator + nb_cs nb_csn + ? gain = 6 droop amplifier ovp fault 1.3 v nb_droop gain = 1 ? pwm_nb psi_l nb_drvon + ? ilimit_nb nb regulator fault logic and monitor circuits nb_g nb_dac out f nb = 1.27 x f vdd vdd slew rate limit nb slew rate limit + + vdd_srl out nb_srl out vdd_srl nb_dac nb_vs+ nb_vs ? nb_srl x x vdd offset scaling nb offset scaling normal operation boot_vid & vfix modes normal operation boot_vid & vfix modes vdd nb NCP5393B hi ? z hi ? z hi ? z hi ? z vdd psi_l vdd psi_l hi ? z shed + vs ? + + vccb
NCP5393B http://onsemi.com 4 figure 3. NCP5393B configured for 3 + 1 phases, with optional droop tbd tbd
NCP5393B http://onsemi.com 5 NCP5393B pin descriptions pin no. symbol description 1 vcca 5 v supply pin for the NCP5393B. the v cc bypassing capacitance must be connected between this pin and gnd (preferably returned to the package flag). 2 gnd small ? signal power supply return. this pin should be tied directly to the package flag (exposed pad). 3 comp output of the voltage error amplifier for the v dd regulator. 4 fb voltage error amplifier inverting input for the v dd regulator. 5 droop voltage output signal proportional to total current drawn from the v dd regulator. used when load line operation (?droop?) is desired. 6 vs+ non ? inverting input to the differential remote sense amplifier for the v dd regulator. 7 vs ? inverting input to the differential remote sense amplifier for the v dd regulator. 8 offset input for offset voltage to be added to the v dd dac?s output voltage. ground this pin for zero v dd offset. 9 diffout output of the differential remote sense amplifier for the v dd regulator. 10 vfix when pulled low, this pin causes the levels on the svc (vid3) and svd (vid2) pins to be decoded as a two ? bit dac code, which controls the v dd and vddnb outputs. internally pulled high by 5 a to v cc 11 12vmon uvlo monitor input for the 12 v power rail. 12 psi_l determines number of phases operating in psi_l mode. phase shed count is locked upon enable assertion. after soft ? start, becomes power saving control in pvid mode. low = phase shed operation, high = normal operation. 13 cs1 non ? inverting input to current sense amplifier #1 for the v dd regulator. see table: ?pin connections vs. phase count? 14 cs1n inverting input to current sense amplifier #1 for the v dd regulator. see table: ?pin connections vs. phase count? 15 cs2 non ? inverting input to current sense amplifier #2 for the v dd regulator. see table: ?pin connections vs. phase count? 16 cs2n inverting input to current sense amplifier #2 for the v dd regulator. see table: ?pin connections vs. phase count? 17 cs3 non ? inverting input to current sense amplifier #3 for the v dd regulator. see table: ?pin connections vs. phase count? 18 cs3n inverting input to current sense amplifier #3 for the v dd regulator. see table: ?pin connections vs. phase count? 19 cs4 non ? inverting input to current sense amplifier #4 for the v dd regulator. see table: ?pin connections vs. phase count? 20 cs4n inverting input to current sense amplifier #4 for the v dd regulator. see table: ?pin connections vs. phase count? 21 ilim overcurrent shutdown threshold for v dd and vddnb. a resistor divider from rosc to gnd is typically used to develop an appropriate voltage on ilim. 22 vccb 5 v supply pin. tie this pin to vcca (pin 1). 23 nb_cs non ? inverting input to the current sense amplifier for the vddnb regulator 24 nb_csn inverting input to the current sense amplifier for the vddnb regulator 25 vid4 parallel voltage id dac input 4. not used in svi mode. 26 vid5 parallel voltage id dac input 5. not used in svi mode. 27 rosc a resistance from this pin to ground programs the v dd and vddnb oscillator frequencies. this pin supplies a trimmed output voltage of 2 v. 28 nb_diffout output of the differential remote sense amplifier for the vddnb regulator. 29 nb_offset input for offset voltage to be added to the vddnb dac?s output voltage. ground this pin for zero vddnb offset. 30 nb_vs ? inverting input to the differential remote sense amplifier for the vddnb regulator. 31 nb_vs+ non ? inverting input to the differential remote sense amplifier for the vddnb regulator.
NCP5393B http://onsemi.com 6 NCP5393B pin descriptions pin no. description symbol 32 nb_droop voltage output signal proportional to total current drawn from the vddnb regulator. used when load line operation (?droop?) is desired. 33 nb_fb voltage error amplifier inverting input for the v ddnb regulator. 34 nb_comp output of the voltage error amplifier for the v ddnb regulator. 35 vid0 parallel voltage id dac input 0. not used in svi mode. 36 vid1 parallel voltage id dac input 1. also used for pvi or svi mode selection. 37 pwrok system power supplies status input. used in svi mode only. 38 enable high = run, low = standby/reset. 39 vid3/svc parallel voltage id dac input 1. also used in svi mode. 40 vid2/svd parallel voltage id dac input 1. also used in svi mode. 41 pwrgood open drain output. high indicates that the active output(s) are within specification. internally pulled high by 5 a to v cc 42 nb_drvon bidirectional gate drive enable to the gate driver for the v ddnb regulator. 43 drvon bidirectional gate drive enable to gate drivers for the v dd regulator. 44 nb_g pwm output to the v ddnb gate driver. 45 g4 pwm output #4. see table: ?pin connections vs. phase count? 46 g3 pwm output #3. see table: ?pin connections vs. phase count? 47 g2 pwm output #2. see table: ?pin connections vs. phase count? 48 g1 pwm output #1. see table: ?pin connections vs. phase count? flag pgnd high ? current power supply return via metal pad (flag) underneath package. the package flag should be tied directly to pin 2. pin connections vs. phase count number of phases g4 g3 g2 g1 cs4 & cs4n cs3 & cs3n cs2 & cs2n cs1 & cs1n 4 phase 4 out phase 3 out phase 2 out phase 1 out phase 4 cs input phase 3 cs input phase 2 cs input phase 1 cs input 3 tie to gnd phase 3 out phase 2 out phase 1 out tie to gnd or v dd phase 3 cs input phase 2 cs input phase 1 cs input 2 tie to gnd phase 2 out tie to gnd phase 1 out tie to gnd or v dd phase 2 cs input tie to gnd or v dd phase 1 cs input
NCP5393B http://onsemi.com 7 absolute maximum ratings electrical information pin symbol v max v min i source i sink 12vmon 13.2 v ? 0.3 v n/a 50 a vcc 7.0 v ? 0.3 v n/a 10 ma comp, nb_comp 5.5 v ? 0.3 v 10 ma 10 ma droop, nb_droop 5.5 v ? 0.3 v 5 ma 5 ma diffout, nb_diffout 5.5 v ? 0.3 v 20 ma 20 ma drvon, nb_drvon 5.5 v ? 0.3 v 5 ma 10 ma pwrgood 5.5 v ? 0.3 v n/a 20 ma vs+, nb_vs+ 3 v ? 0.3 v 1 ma 1 ma vs ? , nb_vs ? 0.3 v ? 0.3 v 1 ma 1 ma rosc 5.5 v ? 0.3 v 1 ma n/a all other pins 5.5 v ? 0.3 v n/a n/a stresses exceeding maximum ratings may damage the device. maximum ratings are stress ratings only. functional operation above t he recommended operating conditions is not implied. extended exposure to stresses above the recommended operating conditions may af fect device reliability. note: all signals are referenced to gnd unless noted otherwise. thermal information rating symbol value unit thermal characteristic, qfn package (note 1) r ja 30.5 c/w operating junction temperature range (note 2) t j 0 to 125 c operating ambient temperature range t a 0 to 70 c maximum storage temperature range t stg ? 55 to +150 c moisture sensitivity level, qfn package msl 1 * the maximum package power dissipation must be observed. 1. jesd 51 ? 5 (1s2p direct ? attach method) with 0 lfm. 2. jesd 51 ? 7 (1s2p direct ? attach method) with 0 lfm.
NCP5393B http://onsemi.com 8 electrical characteristics (unless otherwise stated: 0 c t a 70 c; 4.75 v v cc 5.25 v; all dac codes; c vcc = 0.1 f) parameter test conditions min typ max unit error amplifiers (v dd & v ddnb ) input bias current ? 200 ? 200 na input offset voltage (note 3) v+ = v ? = 1.3v ? 1.0 ? 1.0 mv open loop dc gain c l = 60 pf to gnd, r l = 10 k to gnd ? 80 ? db open loop unity gain bandwidth c l = 60 pf to gnd, r l = 10 k to gnd ? 15 ? mhz open loop phase margin c l = 60 pf to gnd, r l = 10 k to gnd ? 70 ? deg slew rate v in = 100 mv, av = ? 10 v/v, 1.5 v < v comp < 2.5 v, c l = 60 pf, dc loading = 125 a ? 5 ? v/ s maximum output voltage 10 mv of overdrive, i source = 2.0 ma 3.5 ? ? v minimum output voltage 10 mv of overdrive, i sink = 2.0 ma ? ? 1.0 v output source current (note 3) 10 mv of overdrive, v out = 3.5 v ? 2 ? ma output sink current (note 3) 10 mv of overdrive, v out = 1.0 v ? 2 ? ma differential summing amplifiers (v dd & v ddnb ) vs ? input bias current vs ? voltage at 0 v 33 a vs+ input resistance drvon = low 1.0 k drvon = high 7 vs+ input bias voltage drvon = low 0.37 v drvon = high 0.05 vs+ input voltage range (note 3) ? 0.3 ? 3.0 v vs ? input voltage range (note 3) ? 0.3 ? 0.3 v ? 3db bandwidth (note 3) c l = 80 pf to gnd, r l = 10 k to gnd 15 mhz dc gain, vs+ to diffout vs+ to vs ? = 0.5 v to 2.35 v 0.982 1.0 1.022 v/v dac accuracy (measured at vs+) closed loop measurement, error amplifier inside the loop. 1.0125 v vdac 1.5500 v 0.8000 v vdac 1.0000 v 12.5 mv vdac 0.8000 v ? 0.5 ? 5 ? 8 ? ? ? 0.5 5 8 % mv mv slew rate v in = 100 mv, v out = 1.3 v ? 1.2 v 10 v/ s maximum output voltage i source = 2 ma 2.0 v minimum output voltage i sink = 2 ma 0.5 v output source current (note 3) v out = 3 v 2.0 ma output sink current (note 3) v out = 0.5 v 2.0 ma droop amplifiers (v dd & v ddnb ) gain from current sense input to droop amplifier output 0 mv < (csx ? csxn) < 60 mv 5.7 6.0 6.3 v/v droop amplifier dc output voltage csx = csxn = 1.3 v 1.3 v slew rate c l = 20 pf to gnd, r l = 1 k to gnd ? 5.0 ? v/ s maximum output voltage i source = 4.0 ma 3.0 ? ? v minimum output voltage i sink = 1.0 ma ? ? 1.0 v output source current (note 3) v out = 3.0 v ? 4.0 ? ma output sink current (note 3) v out = 1.0 v 1.0 ? ma 3. guaranteed by design. not production tested. 4. for guaranteed phase shed count upon enable assertion, set the psi_l pin voltage range between the values shown for min and max per the intended phase shed count.
NCP5393B http://onsemi.com 9 electrical characteristics (unless otherwise stated: 0 c t a 70 c; 4.75 v v cc 5.25 v; all dac codes; c vcc = 0.1 f) parameter unit max typ min test conditions current sense amplifiers (v dd & v ddnb ) input bias current csx = csxn = 1.4 v ? 50 ? 50 na common mode input voltage range ? 0.3 ? 2.6 v differential mode input voltage range (note 3) ? 120 ? 120 mv input offset voltage (note 3) csx = csxn = 1.00 v ? 1.0 ? 1.0 mv gain from current sense input to pwm comparator 0 mv < (csx ? csxn) < 60 mv 5.0 6.0 7.0 v/v internal offset voltage voltage at error amplifier non ? in- verting inputs ? 1.3 ? v drvon & nb_drvon output voltage (high) sourcing 500 a 3.0 ? ? v output voltage (low) sinking 500 a ? ? 0.7 v delay time propagation delays ? 10 ? ns active internal pull ? up resistance sourcing 500 a ? 2.0 ? k active internal pull ? down resistance sinking 500 a ? 150 ? rise time c l (pcb) = 20 pf, v out = 10% to 90% ? 130 ? ns fall time c l (pcb) = 20 pf, v out = 10% to 90% ? 15 ? ns v dd pwm oscillator switching frequency range 100 ? 900 khz switching frequency accuracy 2 ? or 4 ? phase rosc = 49.9 k rosc = 24.9 k rosc = 10 k 196 380 760 ? ? ? 226 420 981 khz switching frequency accuracy 3 ? phase rosc = 49.9 k rosc = 24.9 k rosc = 10 k 196 380 760 ? ? ? 226 420 981 khz rosc output voltage 10 a irosc 200 a 1.94 2.0 2.06 v v ddnb pwm oscillator switching frequency ? 1.25 ? x f vdd pwm comparators (v dd & v ddnb ) minimum pulse width (note 3) f sw = 800 khz ? 30 ? ns propagation delay (note 3) 20 mv of overdrive ? 10 ? ns magnitude of the pwm ramp ? 1.0 ? v 0% duty cycle comp voltage at which the pwm outputs remain low ? 0.2 ? v 100% duty cycle comp voltage at which the pwm outputs remain high ? 1.2 ? v pwm phase angle error between adjacent phases ? 15 +15 pwrgood output pwrgood output voltage (low) i pgd = 5 ma ? ? 0.4 v pwrgood rise time external pullup of 1 k to 5 v c total = 45 pf, v out = 10% to 90% ? 125 ? ns pwrgood high ? state leakage v pwrgood = 5.25 v ? ? 1 a 3. guaranteed by design. not production tested. 4. for guaranteed phase shed count upon enable assertion, set the psi_l pin voltage range between the values shown for min and max per the intended phase shed count.
NCP5393B http://onsemi.com 10 electrical characteristics (unless otherwise stated: 0 c t a 70 c; 4.75 v v cc 5.25 v; all dac codes; c vcc = 0.1 f) parameter unit max typ min test conditions pwrgood output pwrgood upper threshold v out increasing, dac = 1.3 v (wrt dac) ? 300 ? mv pwrgood lower threshold v out decreasing, dac = 1.3 v ? 350 ? mv pwm outputs (v dd & v ddnb ) output voltage (high) sourcing 500 a 3.0 ? v cc v output voltage (low) sinking 500 a ? ? 0.15 v rise and fall times c l = 50 pf, 0.7 v to 3.0 v or 3.0 v to 0.7 v ? 15 ? ns tri ? state output leakage gx = 2.5 v (x = 1 ? 4 or nb) ? 1.5 ? 1.5 a output impedance ? high or low state resistance to v cc or gnd ? 50 ? vdd regulator 2/3/4 phase detection gate pin source current ? 80 ? a gate pin threshold voltage ? 250 ? mv phase detect timer ? 20 ? s slew rate limiters soft ? start slew rate in any mode during soft ? start 0.64 0.8 0.96 mv/ s slew rate limit in any mode after soft ? start completes ? 3.25 ? mv/ s vid inputs (note: in svi mode, vid[2] = bidirectional ?svd? line and vid[3] = ?svc? clock input supporting amd?s recommendation in either fast ? mode i2c or high ? speed mode i2c) vid input voltage (high) v high 0.9 ? ? v vid input voltage (low) v low ? ? 0.6 v vid hysteresis v high ? v low or v low ? v high ? 100 ? mv input pulldown current v in = 0.6 v ? 1.9 v ? 15 ? a svd output voltage (low) in svi mode, i sink = 5 ma 0 ? 0.25 v enable input enable input voltage (high) v high 2.0 ? ? v enable input voltage (low) v low ? ? 0.8 v enable hysteresis low ? high or high ? low ? 200 ? mv enable input pull ? up current internal pullup to v cc ? 15 ? a vfixen input (active ? low input) vfixen input voltage (high) v high 0.9 ? ? v vfixen input voltage (low) v low ? ? 0.6 v vfixen hysteresis low ? high or high ? low 100 mv vfixen input pull ? up current internal pullup to v cc ? 15 ? a psi_l (power saving phase shed and control, active low) (this pin is used in pvi mode only) psi_l phase shed count (note 4) before enable assertion, no phase shedding while psi_l active ? ? 0.6 v psi_l phase shed count (note 4) before enable assertion, phase shed to 2 phases 0.9 ? 1.1 v psi_l phase shed count (note 4) before enable assertion, phase shed to 1 phase 1.3 ? ? v psi_l input voltage (high) after soft ? start, v high 0.9 ? ? v psi_l input voltage (low) after soft ? start, v low ? ? 0.6 v psi_l hysteresis after soft ? start, v high ? v low or v low ? v high 100 mv 3. guaranteed by design. not production tested. 4. for guaranteed phase shed count upon enable assertion, set the psi_l pin voltage range between the values shown for min and max per the intended phase shed count.
NCP5393B http://onsemi.com 11 electrical characteristics (unless otherwise stated: 0 c t a 70 c; 4.75 v v cc 5.25 v; all dac codes; c vcc = 0.1 f) parameter unit max typ min test conditions current limit current sense amp to i lim gain 20 mv < (csx ? csxn) < 60 mv (cs inputs tied) 5.7 6.0 6.3 v/v ilim pin input bias current ? ? 0.5 a ilim pin working voltage range (note 3) 0.2 ? 2.0 v ilim offset voltage offset extrapolated to csx ? csxn = 0 v, and referred to the ilim pin ? 30 ? mv delay ? 600 ? ns vddnb current limit coefficient = n x v nbilim /v ilim , where n = number of vdd phases, and v nbilim is the equivalent voltage threshold for nb current limit resulting from v ilim . 1.0 v offset inputs (v dd & v ddnb ) output offset voltage above vdac 0 ? 800 mv output overvoltage protection (v dd & v ddnb ) over voltage threshold in normal operation, with no vid changes v dac + 220 v dac + 235 v dac + 250 mv vcca undervoltage protection vcca uvlo start threshold 4.0 4.25 4.5 v vcca uvlo stop threshold 3.8 4.05 4.3 v vcca uvlo hysteresis 200 mv input supply current vcc operating current enable held low, no pwm operation ? 25 35 ma 12vmon 12vmon (high threshold) 8 8.5 9 v 12vmon (low threshold) 7 7.5 8 v 12vmon hysteresis low ? high or high ? low 1.0 v 3. guaranteed by design. not production tested. 4. for guaranteed phase shed count upon enable assertion, set the psi_l pin voltage range between the values shown for min and max per the intended phase shed count. typical characteristics figure 1. ss time vs. temperature figure 2. enable threshold voltage vs. temperature t j , junction temperature ( c) t j , junction temperature ( c) 75 50 25 0 1.95 1.97 1.99 2.01 2.03 75 50 25 0 1.0 1.1 1.2 1.3 1.4 1.5 ss time (ms) en, enable threshold voltage (v) enable increasing voltage enable decreasing voltage
NCP5393B http://onsemi.com 12 typical characteristics figure 3. i cc current vs. temperature figure 4. 2/3/4 phase detection threshold vs. temperature t j , junction temperature ( c) t j , junction temperature ( c) 75 50 25 0 24.0 24.3 24.6 24.9 25.2 25.5 25.8 26.1 75 50 25 0 229.0 229.3 229.6 229.9 230.2 230.5 230.8 231.1 figure 5. v ccp undervoltage lockout threshold voltage vs. temperature figure 6. rosc voltage vs. temperature t j , junction temperature ( c) t j , junction temperature ( c) 75 50 25 0 3.0 3.5 4.0 4.5 75 50 25 0 2.003 2.004 2.005 2.006 2.007 2.008 2.009 i cc current (ma) detect threshold (mv) v ccp uvlo threshold voltage (v) rosc voltage (v) v ccp increasing voltage v ccp decreasing voltage figure 7. 12vmon undervoltage lockout threshold voltage vs. temperature figure 8. pwrgood voltage vs. temperature t j , junction temperature ( c) t j , junction temperature ( c) 75 50 25 0 7.0 7.5 8.0 8.5 9.0 9.5 10 75 50 25 0 310 320 330 340 350 360 370 v cc uvlo threshold voltage (v) pwrgood threshold voltage (mv) v cc increasing voltage v cc decreasing voltage pwrgood upper voltage pwrgood lower voltage
NCP5393B http://onsemi.com 13 functional description general NCP5393B is a universal cpu hybrid power controller compatible with both parallel vid interface (pvi) and serial vid interface (svi) protocols for amd processors. the controller implements a single ? phase control architecture to provide the northbridge (nb) voltage on the same chip. for the core section, programmable 2 ? to ? 4 phase featuring dual ? edge multiphase architecture is implemented. it embeds two independent controllers for cpu core and the integrated nb, each one with its set of protections. the NCP5393B incorporates differential voltage sensing, differential phase current sensing, optional load ? line voltage positioning, and programmable v dd and v ddnb offsets to provide accurately regulated power parallel ? and serial ? vid amd processors. dual ? edge multiphase modulation provides the fastest initial response to dynamic load events. NCP5393B also supports v_fix mode for board debug and testing. in this particular configuration the svi bus is used as a static bus configuring four operative voltages (through svc and svd) for both the sections and ignoring any serial ? vid command. NCP5393B is able to detect which kind of cpu is connected and configures itself to work as a single ? plane pvi controller or dual ? plane svi controller. remote output sensing amplifier (rsa) a true differential amplifier allows the NCP5393B to measure vcore voltage feedback with respect to the vcore ground reference point by connecting the v core reference point to vsp, and the vcore ground reference point to vsn. this configuration keeps ground potential differences between the local controller ground and the v core ground reference point from affecting regulation of vcore between vcore and vcore gr ound reference points. the rsa also subtracts the dac (minus vid offset) voltage, thereby producing an unamplified output error voltage at the diffout pin. this output also has a 1.3 v bias voltage as the floating ground to allow both positive and negative error voltages. precision programmable dac a precision programmable dac is provided and system trimmed. this dac has 0.6% accuracy over the entire operating temperature range of the part. the NCP5393B is a hybrid controller which supports both a six bit parallel vid interface (pvi) and a seven bit serial vid interface (svi). the NCP5393B allows manufacturers to build a motherboard that will accommodate either parallel or serial vid processors in the same socket. high performance voltage error amplifier the error amplifier is designed to provide high slew rate and bandwidth. although not required when operating as the controller of a voltage regulator, a capacitor from comp to vfb is required for stable unity gain test configurations. gate driver outputs and 2/3/4 phase operation the part can be configured to run in 2 ? , 3 ? , or 4 ? phase mode. in 2 ? phase mode, phases 1 and 3 should be used to drive the external gate drivers, g2 and g4 must be grounded. in 3 ? phase mode, gate output g4 must be grounded. in 4 ? phase mode all 4 gate outputs are used as shown in the 4 ? phase applications schematic. the current sense inputs of unused channels should be connected to gnd or to v dd . please refer to table ?pin connections vs. phase counts? for details. differential current sense amplifiers and summing amplifier four differential amplifiers are provided to sense the output current of each phase. the inputs of each current sense amplifier must be connected across the current sensing element of the phase controlled by the corresponding gate output (g1, g2, g3, or g4). if a phase is unused, the differential inputs to that phase?s current sense amplifier must be shorted together and connected to the gnd or to v dd . the current signals sensed from inductor dcr are fed into a summing amplifier to have a summed ? up output. the outputs of current sense amplifiers control three functions. first, the summing current signal of all phases will go through droop amplifier and join the voltage feedback loop for output voltage positioning. second, the output signal from droop amplifier also goes to ilim amplifier to monitor the output current limit. finally, the individual phase current contributes to the current balance of all phases by offsetting their ramp signals of pwm comparators. oscillator and triangle wave generator the controller embeds a programmable precision dual ? oscillator: one section is used for the core and it is a multiphase programmable oscillator managing equal phase ? shift among all phases and the other section is used for the nb section. the oscillator?s frequency is programmed by the resistance connected from the rosc pin to ground. the user will usually form this resistance from two resistors in order to create a voltage divider that uses the rosc output voltage as the reference for creating the current limit setpoint voltage. the oscillator frequency range is 100 khz per phase to 1.0 mhz per phase. the oscillator generates up to 4 symmetrical triangle waveforms with amplitude between 1.3 v and 2.3 v. the triangle waves have a phase delay between them such that for 2 ? , 3 ? and 4 ? phase operation the pwm outputs are separated by 180, 120, and 90 angular degrees, respectively. when the nb phase is enabled, in order to ensure that the vddnb oscillator does not accidentally lock to the vdd oscillator, the vddnb oscillator will free ? run at a frequency which is nominally 1.25 ratio of f vdd .
NCP5393B http://onsemi.com 14 cpu support NCP5393B is able to detect the cpu it is going to supply and configure itself to pvi or svi mode. when in pvi mode, to address the core section the NCP5393B uses vid[5:0]. when in svi mode NCP5393B uses vid2 and vid3 alone for svc and svd information respectively. whether the controller is controlled by the serial or parallel interface is determined by sampling the vid1 line at the time that the voltage regulator enable line is asserted; if the vid1 line is high when enable is asserted, the voltage regulator starts in pvi mode, otherwise the voltage regulator starts in svi mode. pvi ? parallel interface pvi is a 6 ? bit wide parallel interface to address the core section reference. nb is kept in hiz mode. parallel mode operation is depicted in figure 9. voltage identifications for the 6bit amd mode is given in table 2. the normal pvi startup sequence for the NCP5393B is as follows: ? 5 v is applied to the vcca and vccb pins to power the NCP5393B and 12 v is applied to 12vmon. ? the NCP5393B samples the load on the g4 and g2 pins. if these pins are tied to ground the operating mode will be altered from four phase mode, to three phase, or two phase operation. ? the system power sequence logic asserts the NCP5393B enable pin: ? the NCP5393B will sample the vid1 line to determine whether to start in svi or pvi mode. pvid mode is determined when vid1 = high. ? the NCP5393B samples the voltage on the psi_l pin in order to determine the desired operating configuration during power saving mode. ? the boot vid is captured from decoding the voltages on the vid[0:5]. ? the NCP5393B v dd regulator will soft ? start and ramp to the initial boot vid. the vddnb regulator remains off (high ? z output). ? pwrgood is asserted by the NCP5393B. ? pwrok is not used in pvid mode. ? the NCP5393B will accept new vid codes on the parallel vid interface (see table 2). see figure 9 for details. table 1. metal vid/boot vid svc svd output voltage pre ? pwrok metal vid 0 0 1.1 v 0 1 1.0 v 1 0 0.9 v 1 1 0.8 v figure 9. power up sequences in parallel mode operation dc in vddio enable vid[5] pvien/ vid[1] vid[0] vdd only [nddnb n/a] pwrgood pwrok is n/a output rises to boot vid at ss rate soft ? start is complete further vdd transition(s) at regular slew rate vr turn ? off command forces pwrgood low vr turn ? off command pwrgood de ? assertion occurs on faults only vr turn ? on command boot vid msb vid[1] high at rise of enable selects pvi operation boot vid lsb with enable assertion, the psi_l phase shed strategy is locked therefore voltages on psi_l must be stable prior to enable assertion. at end of soft ? start, psi_l can be asserted.
NCP5393B http://onsemi.com 15 table 2. six ? bit parallel vid codes in pvi modes svid[5:0] v out (v) svid[5:0] v out (v) svid[5:0] v out (v) svid[5:0] v out (v) 00_0000 1.5500 01_0000 1.1500 10_0000 0.7625 11_0000 0.5625 00_0001 1.5250 01_0001 1.1250 10_0001 0.7500 11_0001 0.5500 00_0010 1.5000 01_0010 1.1000 10_0010 0.7375 11_0010 0.5375 00_0011 1.4750 01_0011 1.0750 10_0011 0.7250 11_0011 0.5250 00_0100 1.4500 01_0100 1.0500 10_0100 0.7125 11_0100 0.5125 00_0101 1.4250 01_0101 1.0250 10_0101 0.7000 11_0101 0.5000 00_0110 1.4000 01_0110 1.0000 10_0110 0.6875 11_0110 0.4875 00_0111 1.3750 01_0111 0.9750 10_0111 0.6750 11_0111 0.4750 00_1000 1.3500 01_1000 0.9500 10_1000 0.6625 11_1000 0.4625 00_1001 1.3250 01_1001 0.9250 10_1001 0.6500 11_1001 0.4500 00_1010 1.3000 01_1010 0.9000 10_1010 0.6325 11_1010 0.4375 00_1011 1.2750 01_1011 0.8750 10_1011 0.6250 11_1011 0.4250 00_1100 1.2500 01_1100 0.8500 10_1100 0.6125 11_1100 0.4125 00_1101 1.2250 10_1101 0.8250 10_1101 0.6000 11_1101 0.4000 00_1110 1.2000 01_1110 0.8000 10_1110 0.5875 11_1110 0.3875 00_1111 1.1750 01_1111 0.7750 10_1111 0.5750 11_1111 0.3750 svi ? serial interface svi is a two wire, clock and data, bus that connects a single master (cpu) to one NCP5393B. the master initiates and terminates svi transactions and drives the clock, svc, and the data svd, during a transaction. the slave receives the svi transactions and acts accordingly. svi wire protocol is based on fast ? mode i2c. pwrok is proprietary of the svi protocol and is considered at start ? up. the svi mode operation is explained in figure 10. the vid codes from the decoded svi value are given in table 3. the normal svi startup sequence for the NCP5393B is as follows: ? 5 v is applied to the vcca and vccb pins to power the NCP5393B and 12 v is applied to 12vmon. ? the NCP5393B samples the load on the g4 and g2 pins. if these pins are tied to ground the operating mode will be altered from four phase mode, to three phase, or two phase operation. ? the system power sequence logic asserts the NCP5393B enable pin: ? the NCP5393B will sample the vid1 line to determine whether to start in svi or pvi mode. svid mode is determined when vid1 = low. ? the NCP5393B samples the voltage on the psi_l pin in order to determine the desired operating configuration during power saving mode. ? the boot vid is captured from decoding the voltages on the vid3/svc and vid2/svd pins per table 1 and stored. ? the NCP5393B will start the vdd and vddnb regulators. both regulators will soft start and ramp to the boot vid voltage (see table 1). ? the NCP5393B asserts pwrgood. ? the system asserts pwrok the system processor will hold the boot vid voltage for at least 10us after pwrok signal is asserted ? now the NCP5393B can accept new svid codes on the serial vid interface (see table 3). ? if the system should de ? assert pwrok, then the NCP5393B will reset the core and northbridge vids and regulate at the boot vid voltage.
NCP5393B http://onsemi.com 16 table 3. seven ? bit serial vid codes for svi mode svid[6:0] v out (v) svid[6:0] v out (v) svid[6:0] v out (v) svid[6:0] v out (v) 000_0000 1.5500 010_0000 1.1500 100_0000 0.7500 110_0000 0.3500 000_0001 1.5375 010_0001 1.1375 100_0001 0.7375 110_0001 0.3375 000_0010 1.5250 010_0010 1.1250 100_0010 0.7250 110_0010 0.3250 000_0011 1.5125 010_0011 1.1125 100_0011 0.7125 110_0011 0.3125 000_0100 1.5000 010_0100 1.1000 100_0100 0.7000 110_0100 0.3000 000_0101 1.4875 010_0101 1.0875 100_0101 0.6875 110_0101 0.2875 000_0110 1.4750 010_0110 1.0750 100_0110 0.6750 110_0110 0.2750 000_0111 1.4625 010_0111 1.0625 100_0111 0.6625 110_0111 0.2625 000_1000 1.4500 010_1000 1.0500 100_1000 0.6500 110_1000 0.2500 000_1001 1.4375 010_1001 1.0375 100_1001 0.6325 110_1001 0.2375 000_1010 1.4250 010_1010 1.0250 100_1010 0.6250 110_1010 0.2250 000_1011 1.4125 010_1011 1.0125 100_1011 0.6125 110_1011 0.2125 000_1100 1.4000 010_1100 1.0000 100_1100 0.6000 110_1100 0.2000 000_1101 1.3875 010_1101 0.9875 100_1101 0.5875 110_1101 0.1875 000_1110 1.3750 010_1110 0.9750 100_1110 0.5750 110_1110 0.1750 000_1111 1.3625 010_1111 0.9625 100_1111 0.5625 110_1111 0.1625 001_0000 1.3500 011_0000 0.9500 101_0000 0.5500 111_0000 0.1500 001_0001 1.3375 011_0001 0.9375 101_0001 0.5375 111_0001 0.1375 001_0010 1.3250 011_0010 0.9250 101_0010 0.5250 111_0010 0.1250 001_0011 1.3125 011_0011 0.9125 101_0011 0.5125 111_0011 0.1125 001_0100 1.3000 011_0100 0.9000 101_0100 0.5000 111_0100 0.1000 001_0101 1.2875 011_0101 0.8875 101_0101 0.4875 111_0101 0.0875 001_0110 1.2750 011_0110 0.8750 101_0110 0.4750 111_0110 0.0750 001_0111 1.2625 011_0111 0.8625 101_0111 0.4625 111_0111 0.0625 001_1000 1.2500 011_1000 0.8500 101_1000 0.4500 111_1000 0.0500 001_1001 1.2375 011_1001 0.8375 101_1001 0.4375 111_1001 0.0375 001_1010 1.2250 011_1010 0.8250 101_1010 0.4250 111_1010 0.0250 001_1011 1.2125 011_1011 0.8125 101_1011 0.4125 111_1011 0.0125 001_1100 1.2000 011_1100 0.8000 101_1100 0.4000 111_1100 off 001_1101 1.1875 011_1101 0.7875 110_1101 0.3875 111_1101 off 001_1110 1.1750 011_1110 0.7750 101_1110 0.3750 111_1110 off 001_1111 1.1625 011_1111 0.7625 101_1111 0.3625 111_1111 off
NCP5393B http://onsemi.com 17 figure 10. power ? up sequence in serial mode operation dc in vddio enable pvien/ vid[1] vdd and vddnb pwrgood pwrok outputs rise to boot vid at ss rate soft ? start is complete cpu can begin serial data xfer vr turn ? off command pwrgood de ? assertion causes system pwrok de ? assertion vr turn ? on command boot vid msb vid[1] low at rise of enable selects svi operation boot vid lsb svd/ vid[2] system power fault ? revert to boot vid possible pwrgood de ? assertion vr turn ? off command forces pwrgood low resume serial vid transactions svc/ vid[3] with enable assertion, the psi_l phase shed strategy is locked therefore voltages on psi_l must be stable prior to enable assertion. at end of soft ? start, psi_l can be asserted through the svid protocal. hardware jumper override ? v_fix vfix is an active low pin and when it is pulled low, the controller enters v_fix mode. the voltage regulator can be powered when an external svi bus master is not present. when in vfix mode, all of the voltage regulator?s output voltages will be governed by the information shown in table 4, regardless of the state of pwrok. vfix mode is for debug only. if vfix mode is necessary for processor bring ? up, vfixen, svc, and svd should be connected with jumpers to either ground or vddio through suitable pull ? up resistors. svc and svd are considered as static vid and the output voltage will change according to their status. table 4. svi vfix vid codes (two ? bit parallel) svc svd v out (v) 0 0 1.4 0 1 1.2 1 0 1.0 1 1 0.8 the normal vfixen startup sequence for the NCP5393B is as follows: ? 5 v is applied to the vcca and vccb pins to power the NCP5393B and 12 v is applied to 12vmon. ? the NCP5393B samples the load on the g4 and g2 pins. if these pins are tied to ground the operating mode will be altered from four phase mode, to three phase, or two phase operation. ? the system power sequence logic asserts the NCP5393B enable pin: ? the NCP5393B will sample the vid1 line to determine whether to start in svi or pvi mode. ? the NCP5393B samples the voltage on the psi_l pin in order to determine the desired operating configuration during power saving mode. ? the boot vid is dependent on svi or pvi mode startup. ? the ncp593a v dd regulator (and vddnb if in svid mode) will soft ? start and ramp to the initial boot vid. ? vfixen mode is entered once vfixen is asserted and the v dd and vddnb regulators will regulate to the vfixen vid. ? vfixen vid is captured from decoding the voltages on the vid3/svc and vid2/svd pins per table 4. ? if vfixen is asserted prior to the vid controller reaching the boot vid, the vid controller will move to the vfixen vid. ? if vfixen is de ? asserted, the evice pors. this occurs independent of enable. pwrok de ? assertion anytime pwrok de ? asserts while en is asserted, the controller uses the previously stored boot vid and regulates all planes to that level performing an on ? the ? fly transition to that level. pwrgood remains asserted in this process.
NCP5393B http://onsemi.com 18 power saving indicator (psi_l) and phase shedding an amd pvid processor provides an output signal to the NCP5393B controller?s psi_l input to indicate when the processor is in a low power state. an amd svid processor indicates psi_l mode through the svid protocol. the NCP5393B uses psi_l assertion to maximize efficiency at light loads. when psi_l is asserted, the psi_l function will be enabled, and the NCP5393B will run with a reduced phase count. the number of phases in psi_l mode is determined by the voltage level present on the psi_l input upon enable assertion. this detection of phase count applies for both pvid and svid amd processors. protection features: the NCP5393B handles many protection features. undervoltage lockout, over current shutdown, overvoltage, under voltage, soft ? start etc are the main features. all the fault responses of the NCP5393B are listed in table 5. undervoltage lockout an undervoltage lockout (uvlo) senses the v cc and v ccp input. during powerup, the input voltage to the controller is monitored, and the pwm outputs and the soft ? start circuit are disabled until the input voltage exceeds the threshold voltage of the uvlo comparator. the uvlo comparator incorporates hysteresis to avoid chattering, since v cc is likely to decrease as soon as the converter initiates soft ? start. overcurrent shutdown a programmable overcurrent function is incorporated within the ic. a comparator and latch make up this function. the inverting input of the comparator is connected to the ilim pin. the voltage at this pin sets the maximum output current the converter can produce. the rosc pin provides a convenient and accurate reference voltage from which a resistor divider can create the overcurrent setpoint voltage. although not actually disabled, tying the ilim pin directly to the rosc pin sets the limit above useful levels ? effectively disabling overcurrent shutdown. the comparator noninverting input is the summed current information from the vdrp minus offset voltage. the overcurrent latch is set when the current information exceeds the voltage at the ilim pin. the outputs are pulled low, and the soft ? start is pulled low. the outputs will remain disabled until the v cc voltage is removed and re ? applied, or the enable input is brought low and then high. the NCP5393B handles core per ? phase over ? current also. if over ? current is detected in a phase, then the pwm of that phase will be turned off. cycle ? by ? cycle current limit protection is implemented for per ? phase over ? current in the NCP5393B. dr von never goes low due to per ? phase current trip. nb over current is handled in similar way as the global core over current. the total output current is compared with ilimit * 1.0. when over ? current occurs in the nb, nb ? drvon is pulled low. output overvoltage and undervoltage protection and power good monitor an output voltage monitor is incorporated. during normal operation, if the output voltage is 250 mv over the dac voltage, the pwrgood goes low, the drvon signal remains high, the pwm outputs are set low. the outputs will remain disabled until the v cc voltage is removed and reapplied. every time the ov is triggered it will increment the ov counter. if the counter reaches a count of 16 then the ov condition will latch into a permanent ov state. it will require por or disable/enable to restart. prior to latching if the ov condition goes away then normal operation will resume. an ov decrement counter is also incorporated. it consists of a free ? running clock which runs at 8x the pwm frequency. so essentially every 4096 pwm cycles the ov counter will decrement. for example, for a max pwm frequency of 1 mhz, the counter decrements roughly every 4 ms and for a pwm frequency of 400 khz, it would be about every 10 ms. during normal operation, if the output voltage falls more than 350 mv below the dac setting, the pwrgood pin will be set low until the output voltage rises. soft ? start the NCP5393B ramps vdd (and vddnb in svid mode) to the boot vid at a soft ? start rate of 0.8 mv/ s typical. upon receiving a pvid or svid code (after pwrok assertion) the outputs ramp to the final dac setting at the dynamic vid slew rate of 3.25 mv/ s. typical soft ? start sequence timing is shown in figure 11.
NCP5393B http://onsemi.com 19 figure 11. soft start sequence to vcore voltage boot voltage vid setting time NCP5393B internal dynamic vid slew rate 3.25 mv/ s NCP5393B soft ? start slew rate 0.8 mv/ s table 5. fault responses condition pwm output(s) pwrgood drvon (vdd) drvon (nb) reset method notes vdd global ocp all to high ? z latched low latched low latched low cycle enable or +5 v and +12 v nb ocp all to high ? z latched low latched low latched low cycle enable or +5 v and +12 v vdd per ? phase current lim- it affected phase set to low state unaffected unaffected unaffected may eventually cause a global ocp or output uv. output ovp ? infrequent held low for duration of ov held low for duration of ov plus 500 s unaffected unaffected ?infrequent? = fewer than 17 events per 4096/fpwm seconds (e.g., 4.096 ms at core pwm = 1 mhz) output ovp ? frequent latched low latched low unaffected unaffected cycle enable, vcc (5 v) or 12 vmon ?frequent? = 17 or more events per 4096/fpwm seconds (e.g., 4.096 ms at core pwm = 1 mhz) output uv monitor unaffected held low for duration of uv unaffected unaffected unused phase of vdd regulator set to high ? z unaffected unaffected unaffected vddnb disabled set to high ? z unaffected by nb status unaffected latched low 5 v uvlo all to high ? z held low low until 5 v and 12 v are ok low until 5 v and 12 v are ok raise +5 v above uvlo threshold 5 v and 12 v uvlo are the only modes which will force re ? evaluating the phase count. 12 v uvlo all to high ? z held low low until 5 v and 12 v are ok low until 5 v and 12 v are ok raise +12 v above uvlo threshold 5 v and 12 v uvlo are the only modes which will force re ? evaluating the phase count.
NCP5393B http://onsemi.com 20 table 5. fault responses condition notes reset method drvon (nb) drvon (vdd) pwrgood pwm output(s) drvon is pulled low by external means unaffected (see notes ) held low while low a weak pull ? up turns on unaffected address underlying cause, and let drvon go high vdd will try to regulate to 0 v. drvon low will cause vdd mosfets to turn off. both vdd & vddnb will go through a ss upon recovery. nb_drvon is pulled low by external means unaffected (see notes ) held low unaffected while low a weak pull ? up turns on address underlying cause, and let nb_drvon go high vddnb will try to regulate to 0 v. with nb_drvon low, all vddnb mosfets to turnoff. both vdd & vddnb will go through a ss upon recovery. enable is low all to high ? z held low held low held low assert enable high cycling enable does not cause the NCP5393B to re ? evaluate the programmed number of phases
NCP5393B http://onsemi.com 21 programming the current limit and the oscillator frequency the demo board is set for an operating frequency of approximately 330 khz. the rosc pin provides a 2.0 v reference voltage which is divided down with a resistor divider and fed into the current limit pin ilim. calculate the total series resistance to set the frequency and then calculate the individual rlim1 and rlim2 values for the divider. the series resistors rlim1 and rlim2 sink current from the ilim pin to ground. this current is internally mirrored into a capacitor to create an oscillator. the period is proportional to the resistance and frequency is inversely proportional to the total resistance. the total resistance may be estimated by equation 2. this equation is valid for the individual phase frequency in both three and four phase mode. r total 24686 fsw ? 1.1549 (eq. 1) 30.5 k 24686 330 ? 1.1549 figure 12. rosc vs. frequency the current limit function is based on the total sensed current of all phases multiplied by a gain of 6. dcr sensed inductor current is function of the winding temperature. the best approach is to set the maximum current limit based on the expected average maximum temperature of the inductor windings. dcr tmax dcr 25c (eq. 2) (1 0.00393 (t max ? 25)) calculate the current limit voltage: v ilimit 6 i min_ocp dcr tmax dcr tmax vout 2vinf sw vin ? vout l
(n ? 1) vout l (eq. 3) solve for the individual resistors: (eq. 4) rlim2 v ilimit r total 2v rlim1 r total ? r lim2 (eq. 5) final equation for the current limit threshold i limit (t inductor ) 2vrlim2 rlim1 rlim2 6(dcr 25c (1 0.00393(t inductor ? 25)))
vout 2vinf sw vin ? vout l
(n ? 1) vout l (eq. 6) the inductors on the demo board have a dcr at 25 c of 0.75 m . selecting the closest available values of 16.9 k for rlim1 and 13.7 k for rlim2 yield a nominal operating frequency of 330 khz and an approximate current limit of 152 a at 100 c. the total sensed current can be observed as a scaled voltage at the vdrp pin added to a positive, no ? load offset of approximately 1.3 v.
NCP5393B http://onsemi.com 22 output offset voltages external offset voltages from 0 mv to 800 mv ?above the dac? can be added for the v dd and v dd_nb independently. offset is set by a resistor divider from v cc to gnd. output of fsets are ratiometric to v cc . as v cc changes, the on ? chip scaling factors change by the same amount: offset = 0.8 v x v offset /v cc for example: for 0 v offset: pin voltage = gnd; for 800 mv offset: pin voltage = v cc minimum voffset_in (as vin/v cc ) typical voffset_in (as vin/v cc ) maximum voffset_in (as vin/v cc ) resulting output offset units 0 0 0.046875 0 mv 0.046875 0.06250 0.078125 25 mv 0.078125 0.09375 0.109375 50 mv 0.109375 0.12500 0.140625 75 mv 0.140625 0.15625 0.171875 100 mv 0.171875 0.18750 0.203125 125 mv 0.203125 0.21875 0.234375 150 mv 0.234375 0.25000 0.265625 175 mv 0.265625 0.28125 0.296875 200 mv 0.296875 0.31250 0.328125 225 mv 0.328125 0.34375 0.359375 250 mv 0.359375 0.37500 0.390625 275 mv 0.390625 0.40625 0.421875 300 mv 0.421875 0.43750 0.453125 325 mv 0.453125 0.46875 0.484375 350 mv 0.484375 0.50000 0.515625 375 mv 0.515625 0.53125 0.546875 400 mv 0.546875 0.56250 0.578125 425 mv 0.578125 0.59375 0.609375 450 mv 0.609375 0.62500 0.640625 475 mv 0.640625 0.65625 0.671875 500 mv 0.671875 0.68750 0.703125 525 mv 0.703125 0.71875 0.734375 550 mv 0.734375 0.75000 0.765625 575 mv 0.765625 0.78125 0.796875 600 mv 0.796875 0.81250 0.828125 625 mv 0.828125 0.84375 0.859375 650 mv 0.859375 0.87500 0.890625 675 mv 0.890625 0.90625 0.921875 700 mv 0.921875 0.93750 0.953125 725 mv 0.953125 0.96875 0.984375 750 mv 0.984375 1.00000 v cc +0.3 v 800 mv the input to the offset pin for the vdd output is encoded by an internal adc. the input to the nb_offset pin for the vddnb output is encoded by the same adc. the reference for this adc is v cc . the adc?s output is ratiometric to v cc . voffset in represents the voltage applied to the offset or nb_offset pin. it is intended that these voltages be derived by a resistive divider from v cc . the recommended total driving impedance is <10 k .
NCP5393B http://onsemi.com 23 in some modes, significant offset above vdac could cause u npredictable results, or be harmful. the NCP5393B avoids such modes. mode vdd offset nb offset notes pvi (soft ? start) no n/a soft ? start is to boot vid; nb is off pvi (normal operation) yes n/a open it up for testing and gaming. svi (soft ? start) no no soft ? start is to boot vid; nb is on svi (boot vid) no no boot vid is amd?s start ? up value svi (normal operation) yes yes open it up for testing and gaming. vfix no no vfix is a special test mode
NCP5393B http://onsemi.com 24 package dimensions qfn48 7x7, 0.5p case 485aj ? 01 issue o note 3 seating plane k 0.15 c (a3) a a1 d2 b 1 13 25 48 37 2x 2x e2 48x 12 36 l 48x bottom view top view side view 0.15 c d a b e pin 1 location 0.08 c 0.05 c e 0.10 c 0.05 c a b c notes: 1. dimensions and tolerancing per asme y14.5m, 1994. 2. controlling dimension: millimeters. 3. dimension b applies to the plated terminal and is measured abetween 0.15 and 0.30 mm from terminal tip. 4. coplanarity applies to the exposed pad as well as the terminals. dim min max millimeters a 0.80 1.00 a1 0.00 0.05 a3 0.20 ref b 0.20 0.30 d 7.00 bsc d2 5.00 5.20 e 7.00 bsc e2 5.00 5.20 e 0.50 bsc k 0.20 ??? l 0.30 0.50 note 4 l detail a optional construction 2x scale detail a e/2 dimensions: millimeters 0.50 pitch 5.20 0.30 48x 7.30 *for additional information on our pb ? free strategy and soldering details, please download the on semiconductor soldering and mounting techniques reference manual, solderrm/d. soldering footprint* 1 2x 2x 0.63 48x on semiconductor and are registered trademarks of semiconductor components industries, llc (scillc). scillc reserves the right to mak e changes without further notice to any products herein. scillc makes no warranty, representation or guarantee regarding the suitability of its products for an y particular purpose, nor does scillc assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including wi thout limitation special, consequential or incidental damages. ?typical? parameters which may be provided in scillc data sheets and/or specifications can and do vary in different application s and actual performance may vary over time. all operating parameters, including ?typicals? must be validated for each customer application by customer?s technical experts. sc illc does not convey any license under its patent rights nor the rights of others. scillc products are not designed, intended, or authorized for use as components in systems in tended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the scillc product could create a sit uation where personal injury or death may occur. should buyer purchase or use scillc products for any such unintended or unauthorized application, buyer shall indemnify and hol d scillc and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising ou t of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that scillc was negligent regarding th e design or manufacture of the part. scillc is an equal opportunity/affirmative action employer. this literature is subject to all applicable copyright laws and is not for resa le in any manner. publication ordering information n. american technical support : 800 ? 282 ? 9855 toll free usa/canada europe, middle east and africa technical support: phone: 421 33 790 2910 japan customer focus center phone: 81 ? 3 ? 5773 ? 3850 NCP5393B/d the products described herein (NCP5393B), may be covered by one or more of the following u.s. patents, #us07057381 . there may be other patents pending. literature fulfillment : literature distribution center for on semiconductor p.o. box 5163, denver, colorado 80217 usa phone : 303 ? 675 ? 2175 or 800 ? 344 ? 3860 toll free usa/canada fax : 303 ? 675 ? 2176 or 800 ? 344 ? 3867 toll free usa/canada email : orderlit@onsemi.com on semiconductor website : www.onsemi.com order literature : http://www.onsemi.com/orderlit for additional information, please contact your loca l sales representative

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