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general description the max14736/max14737 overvoltage-protection (ovp) devices guard battery-powered modules in portable devices against overvoltage faults. the low 15m (typ) on-resistance, as well as the low 13a (typ) quiescent supply current of the devices, minimize power consump - tion, making them an ideal choice for low-power systems. additionally, the devices feature a precision overvoltage- lockout (ovlo) threshold, ultra-fast response time, and surge suppression to 35v, which serve to provide excel - lent protection against even high slew-rate, high-voltage transients. the integrated power transistor in the devices is a p-channel device, but the intrinsic body diode from out to in is removed through appropriate design techniques. consequently, when the switch is in the off state, reverse- current blocking that is inherent to the devices. the max14736/max14737 feature a push-pull pok output, which is driven low if either an overvoltage, undervoltage, or thermal fault is detected; or if the device is placed into shutdown mode. the max14736 has an active-low enable pin ( en ), while the enable pin (en) on the max14737 is active high. when the enable pin is driven to the active state, the device is enabled. when driven to the inactive state, the device is placed in a low-power shutdown mode and the switch is kept in the off state. the max14736/max14737 are offered in a small, 9-bump (1.34mm x 1.36mm) wafer-level package (wlp) and oper - ate over the -40c to +85c extended temperature range. beneits and features protects battery-connected modules with minimal power consumption ? wide operating input voltage: +2.1v to +5.5v ? 4.5a continuous current capability ? integrated 15m (typ) pfet ? ultra-low supply current: 13a (typ) allows precise design in ovlo implementation ? preset accurate internal ovp thresholds ? max14736: 4.7v 2.0% ? max14737: 5.2v 2.0% increases system reliability through premium security ? surge immunity to 35v ? soft-start to minimize inrush current ? output hot plug-in protection ? thermal shutdown ? ultra-fast ovp response time: 200ns (typ) minimizes board space by compact wlp ? 9-bump 1.34mm x 1.36mm wlp applications smartphones tablet pcs e-readers ordering information appears at end of data sheet. 19-7517; rev 0; 5/15 typical application circuit pmic gnd max14737 pok outout out en in inin 0.1f 1k 0.1f chgin batin byp sys bypass system micro-b usb hidden battery max14736/max14737 precision, ultra-fast, low supply current, bidirectional overvoltage protector downloaded from: http:///
(all voltages referenced to gnd.) in (note 1), out, en, en ....................................... -0.3v to +6v pok ............................................. -0.3v to max (in,out) + 0.3v maximum current into in (dc) (note 2) .............................. 4.5a peak current into in (10ms) ................................................... 8a continuous power dissipation (t a = +70c) wlp (derate 11.9mw/c above +70c) ...................... 952mw operating temperature range ........................... -40c to +85c junction temperature ...................................................... +150c storage temperature range ............................ -65c to +150c soldering temperature (reflow) ....................................... +260c wlp junction-to-ambient thermal resistance ( ja ) ..... 83.98c/w (note 3) (v in = +2.1v to +5.5v, t a = -40c to +85 c, unless otherwise noted. typical values are at v in = 4.3v, t a = +25 c, unless otherwise noted.) (note 4) electrical characteristics parameter symbol conditions min typ max units in, out input voltage range v in 2.1 5.5 v supply current i in v in = 4.3v, no load 13 30 a in shutdown current i in_q device disabled,v in = 4.3v, v out = 0v 2 6 a out shutdown current device disabled,v out = 5v, v in = 0v 2 6 a ovpon-resistance (in to out) r on v in = 4.3v, i out = 100ma, 15 22 m? overvoltage trip-level threshold v ovlo v in rising max14736 4.600 4.700 4.800 v max14737 5.095 5.200 5.305 v overvoltage trip-level hysteresis v ovlo_ 100 mv undervoltage trip-level threshold v uvlo 2.015 v undervoltage trip-level hysteresis v uvlo_ 80 mv out load capacitance c out 100 f digital output (pok) output voltage low v ol i sink = 100a 0.4 v output voltage high v oh i source = 100a 1.4 v max14736/max14737 precision, ultra-fast, low supply current, bidirectional overvoltage protector www.maximintegrated.com maxim integrated 2 note 1: survives burst pulse up to 40v with 2 minimum source resistance. note 2: limited by thermal design. note 3: package thermal resistances were obtained using the method described in jedec specification jesd51-7, using a four-layer board. for detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial . absolute maximum ratings stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. these are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. package thermal characteristics downloaded from: http:///
(v in = +2.1v to +5.5v, t a = -40c to +85c, unless otherwise noted. typical values are at v in = 4.3v, t a = +25oc, unless otherwise noted.) (note 4)note 4: all devices are 100% production tested at t a = +25c. limits over temperature are guaranteed by design. note 5: all timing characteristics are measured using 20% to 80% levels, unless otherwise noted. parameter symbol conditions min typ max units enable input (en, en ) (figure 1) en, en input high current i en_h v in = 5.5v, v en = 3.0v, v en = 3.0v (internal 650k? connected to gnd) 4.6 a en, en input low current i en_l v en = 0v, v en = 0v -0.1 +0.1 a en, en input voltage high v ih 1.6 v en, en input voltage low v il 0.4 v timing characteristics (note 5) debounce time t deb from v en = 3.0v, v en = 0v to when pok goes high 15 ms soft-start time t ss 30 ms switch turn-on time t on v in = 5v, r l = 100?, c l = 100f, v out = 10% to 90% of v in 4 ms switch turn-off response time t off_res v in = v ovlo(min) ; v in rising at 2v/s until v out stops rising, r l = 200 ns thermal protection thermal shutdown t shdn 150 c thermal hysteresis t hys 20 c esd protectionhuman body model all pins 2 kv in pin, with 0.1f bypass capacitor 15 kv max14736/max14737 precision, ultra-fast, low supply current, bidirectional overvoltage protector www.maximintegrated.com maxim integrated 3 electrical characteristics (continued) downloaded from: http:///
figure 1. timing diagram t deb out in t off_res en v in_min thermal shutdown t deb t deb v ovlo t ss t deb pok t on max14736/max14737 precision, ultra-fast, low supply current, bidirectional overvoltage protector www.maximintegrated.com maxim integrated 4 downloaded from: http:///
(v in = 4.3v, t a = +25oc, unless otherwise noted.) 0.8 1.0 1.2 1.4 1.6 1.8 2 2.5 3 3.5 4 4.5 5 5.5 normalized on - resistance input voltage (v) normalized on - resistance vs. input voltage normalized to v in = 4.3v toc04 max14737 i out = 1a 0 2 4 6 8 10 12 14 16 18 20 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 supply current (a) in voltage (v) in supply current vs. supply voltage v en = v in toc01 t a = - 40oc t a = +25oc t a = +85oc max14737 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 -40 -15 10 35 60 85 norm al ized on-r es ista nc e temperature (c) normalized on-r es ist anc e vs . t empe ra t ur e norm al ized to + 25 c toc02 i out = 1a 0.90 0.95 1.00 1.05 1.10 1.15 1.20 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 normalized on - resistance output current (a) normalized on - resistance vs. output current toc03 normalized to 0.1a load current 0.98 0.99 1.00 1.01 1.02 -40 -15 10 35 60 85 normalized ovlo threshold normalized ovlo threshold vs. temperature toc05 normalized to +25 c 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 -40 -15 10 35 60 85 normalized debounce time temperature ( c) normalized debounce time vs. temperature toc06 normalized to +25 c max14736/max14737 precision, ultra-fast, low supply current, bidirectional overvoltage protector maxim integrated 5 www.maximintegrated.com typical operating characteristics downloaded from: http:///
(v in = 4.3v, t a = +25oc, unless otherwise noted.) 2v/div 2v/div 2v/div toc10 2s/div overvoltage-fault response 100ma/d iv max14737 0v v in v out i out v pok 0v 0a 5v/div 100ma/div 5v/div toc07 10ms/div v in v pok power-up response c l = 100f v out 2v/div i out 5v/div 5v/div 1a/div toc08 10ms/div v in v pok power- up response c l = 1000f v out 2v/div i out 5v/div 5v/div 2v/div toc09 10ms/div v in v out overvoltage-fault response v pok 100ma/d iv i out max14737 max14737 10v/div toc11 10s/div v in 35v surge test waveform without max14737 5v/div (ac- coupled) 5v/div toc12 10s/div v in v out 35v surge test waveform with max14737 v out initial voltage = 2.5v max14736/max14737 precision, ultra-fast, low supply current, bidirectional overvoltage protector maxim integrated 6 www.maximintegrated.com typical operating characteristics (continued) downloaded from: http:///
bump name function max14736 max14737 a1 a1 pok push-pull power-okay output. when the pok output is low, an ovlo, uvlo, or thermal fault has been detected, or the device has been placed into shutdown mode. a2 a2 gnd ground a3 en active-low enable input. drive en high to place the device in shutdown mode (power switch is open). drive en low to place the device in normal operating mode. a3 en active-high enable input. drive en low to place the device in shutdown mode (power switch is open). drive en high to place the device in normal operating mode. b1, b2, c1 b1, b2, c1 in overvoltage-protection input. bypass in with a 0.1f ceramic capacitor for 15kv human body model (hbm) esd protection. no capacitor is required for 2kv hbm esd protection. externally connect all the in pins together. b3, c2, c3 b3, c2, c3 out overvoltage-protection output. bypass out with at least a 1f ceramic capacitor. externally connect all the out pins together. wlp top view bump - side down ma x 14736 max 14737 + pok 1 in 2 in 3 gnd a in b out c en ( en ) out out () max 14736 only max14736/max14737 precision, ultra-fast, low supply current, bidirectional overvoltage protector www.maximintegrated.com maxim integrated 7 bump conigurationbump description downloaded from: http:///
detailed description the max14736/max14737 overvoltage-protection (ovp) devices guard battery-powered modules in portable devices against overvoltage faults. the low, 15m (typ) on-resistance, as well as the low 13a (typ) quiescent supply current of the devices minimize power consumption, making them an excel - lent choice for low-power systems. additionally, the devices feature a precision overvoltage-lockout (ovlo) threshold, ultra-fast response time, and surge suppression to 35v, which serve to provide excellent protection against even high- slew rate, high-voltage transients. the integrated power transistor in the devices is a p-channel device, but the intrinsic body diode from out to in is removed through appropriate design techniques. consequently, when the switch is in the off state, reverse- current blocking is inherent to the devices. the devices feature a push-pull pok output that is driven low if either an overvoltage, undervoltage, or thermal fault is detected; or if the device is placed into shutdown mode. the max14736 has an active-low enable pin ( en ), while the enable pin (en) on max14737 is active-high. when driven to the active state, the device is enabled. when driven to the inactive state, the device is placed in a low-power shutdown mode and the switch is kept in the off state. device operationthe devices contain timing logic that controls the turn- on of the internal fet. when the device is enabled and v uvlo < v int * < v ovlo , the internal gate-driver circuitry is powered. after 15ms of debounce time, which prevents false turn-on of the fet during startup, the soft-start function limits inrush current through the fet for 30ms (typ). at any time, if v int * rises above v olvo , or falls below v uvlo , the fet is turned off and out is consequently disconnected from in. *v int = max(v in , v out ) in out gnd timing and control logic gate driver temperature faults in out in out en max 14736/ max 14737 pok pok v ovlo in out ideal diodes ( en )* * en for max 14736 en for max 14737 max14736/max14737 precision, ultra-fast, low supply current, bidirectional overvoltage protector www.maximintegrated.com maxim integrated 8 functional diagram downloaded from: http:///
overvoltage lockout the max14736 offers a 4.7v (typ) precision overvoltage threshold, while the overvoltage threshold for max14737 is 5.2v (typ). when in or out rise above the overvoltage- lockout threshold (v ovlo ), out is disconnected from in. when v int * drops by the ovlo falling hysteresis (v ovlo_hys ), out and in are reconnected. shutdown mode the devices feature a low-power shutdown mode, which disconnects out from in and reduces current consumption to 2a (typ). to enter shutdown mode, drive en high on the max14736 or en low on the max14737. the pok output is driven low when the device is in shutdown mode. for max14737, en has an internal pulldown resistor. the max14737 is placed in shutdown mode by leaving en unconnected. thermal-shutdown protection the devices contain internal thermal-shutdown circuitry necessary to protect the devices. the internal fet turns off, and pok is driven low, when the junction temperature exceeds +150c (typ). the devices exit thermal shutdown after the junction temperature cools by 20c (typ). pok output the push-pull pok output on the devices assert high when they are enabled and when ovlo, uvlo, or ther - mal fault is not present. table 1 shows the truth table for the pok output. table 1. pok truth table * v int = max(v in , v out ) v int * en (max14736) en (max14737) thermal shutdown pok v uvlo < v int < v ovlo high low no fault low fault low low high no fault high (after t deb ) fault low v int < v uvlo or v int > v ovlo high low no fault low fault low low high no fault low fault low max14736/max14737 precision, ultra-fast, low supply current, bidirectional overvoltage protector www.maximintegrated.com maxim integrated 9 downloaded from: http:///
applications information in bypass capacitor the max14736/max14737 do not require an input capacitor, though it is generally recommended to bypass in to gnd with a 0.1f ceramic capacitor as close as possible to the device. if the power source has significant inductance due to long lead length or other non-ideal layout conditions, the device clamps the overshoot due to the lc tank circuit. output capacitor the soft-start functionality included in the max14736/ max14737 limits inrush current for 30ms (typ), allowing the devices to charge capacitances over 1000f. esd test conditions esd performance depends on a number of conditions. the max14736/max14737 are specified for 2kv (hbm) typical esd resistance on all pins and 15kv (hbm) typi - cal esd resistance on in with a 0.1f bypass capacitor. hbm esd protection figure 2 shows the human body model, while figure 3 shows the current waveform it generates when discharged into low impedance. this model consists of a 100pf capacitor charged to the esd voltage of interest, which is then discharged into the device through a 1.5k resistor. figure 2. human body esd test model t r = 0.7ns to 1ns 30ns 60ns t 100% 90%10% i peak i charge-current- limit resistor discharge resistance storagecapacitor c s 100pf r c 1m ? r d 1500 ? high- voltage dc source device under test figure 3. human body current waveform max14736/max14737 precision, ultra-fast, low supply current, bidirectional overvoltage protector www.maximintegrated.com maxim integrated 10 downloaded from: http:///
note: all devices are specified over the -40c to +85c extended temperature range. + denotes lead(pb)-free/rohs-compliant package. t = tape and reel. part enable polarity ovlo (v) top mark pin-package max14736 ewl+t en 4.7 akq 9 wlp max14737 ewl+t en 5.2 akr 9 wlp package type package code outline no. land pattern no. 9 wlp w91k1+1 21-0760 refer to application note 1891 max14736/max14737 precision, ultra-fast, low supply current, bidirectional overvoltage protector www.maximintegrated.com maxim integrated 11 chip information process: bicmos ordering information package information for the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages . note that a +, #, or - in the package code indicates rohs status only. package drawings may show a different suffix character, but the drawing pertains to the package regardless of rohs status. downloaded from: http:///
revision number revision date description pages changed 0 5/15 initial release maxim integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim integrated product. no circuit patent licenses are implied. maxim integrated reserves the right to change the circuitry and speciications without n otice at any time. the parametric values (min and max limits) shown in the electrical characteristics table are guaranteed. other parametric values quoted in this data sheet are provided for guidance. maxim integrated and the maxim integrated logo are trademarks of maxim integrated products, inc. max14736/max14737 precision, ultra-fast, low supply current, bidirectional overvoltage protector ? 2015 maxim integrated products, inc. 12 revision history for pricing, delivery, and ordering information, please contact maxim direct at 1-888-629-4642, or visit maxim integrateds website at www.maximintegrated.com. downloaded from: http:///

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