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dsp switcher? 88mg875z-x/ 88mg876-x series 5a rated output current, non-isolated, step- down switching regulator module with anyvolt- age? technology advance specifications, patent pending doc. no. mv-s102822-00, rev. b april 4, 2006
no part of this document may be reproduced or transmitted in any form or by any means, electronic or mechanical, including phot ocopying and recording, for any purpose, without the express written permission of marvell. marvell retains the right to make changes to this document at any time, without notice. marvell makes no warranty of any kind, expressed or implied, with regard to any information contained in this document, including, but not limited to, the implied warranties of merchantability or fitn ess for any particular purpose. further, marvell does not warrant the accuracy or completeness of the information, text, graphics, or other items contained within this document. marvell products are not designed for use in life-support equipment or applications that would cause a life-threatening situati on if any such products failed. do not use marvell products in these types of equipment or applications. with respect to the products described herein, the user or recipient, in the absence of appropriate u.s. government authorizati on, agrees: 1) not to re-export or release any such information consisting of technology, software or source code controlled for national s ecurity reasons by the u.s. export control regulations ("ear"), to a national of ear country groups d:1 or e:2; 2) not to export the direct product of such technology or such software, to ear country groups d: 1 or e:2, if such technology o r software and direct products thereof are controlled for national security reasons by the ear; and, 3) in the case of technology controlled for national security reasons under the ear where the direct product of the technology is a complete plant or component of a plant, not to export to ear country groups d:1 or e:2 the direct product of the plant or major component thereof, if such direct product is controlled for national security reasons by the ear, or is subject to controls under the u.s. munitions list ("usml"). at all times hereunder, the recipient of any such information agrees that they shall be deemed to have manually signed this doc ument in connection with their receipt of any such information. copyright ? 2006. marvell international ltd. all rights reserved. marvell, the marvell logo, moving forward faster, alaska, fas twriter, galnet, libertas, link street, netgx, phyadvantage, prestera, virtual cable tester, and yukon are registered trademarks of marvell. anyvoltage, discovery, dsp switcher, feroceon, galtis, horizon, radlan, rais ing the technology bar, the technology within, unimac, and vct are trademarks of marvell. all other trademarks are the property of their respective owners. 88mg875z-x/88mg876-x 5a rated output current, non-isol ated, step-down switching regulator module with anyvoltage? technology doc. no. mv-s102822-00 rev. b copyright@ 2006 marvell page 2 document classification: proprietary information april 4, 2006, advance document status advance information this document contains design specifications for in itial product development. specifications may change without notice. contact marvell field application engineers for more information. preliminary information this document contains preliminary data, and a revision of this document will be published at a later date. specifications may change without notice. contact marvell field application engineers for more information. final information this document contains specifications on a product that is in final releas e. specifications may change without notice. contact marvell field application engineers for more information. revision code: rev. b advance technical publication: 0.61
5a rated output current, non-isolated, step-down switching regulator module with anyvoltage? technology 88mg875z-x/88mg876-x series copyright@ 2006 marvell doc. no. mv-s102822-00, rev. b april 4, 2006, advance document classifi cation: proprietary information page 3 f eatures /b enefits ? true lead-free "plug-n-play" solution ? no external components required - except a sin- gle voltage programming resistor ? tiny sip, dip, and smt packages available ? input voltage range: 3v to 5.5v ? programmable output vo ltage: 0.72v to 3.63v ? 1 mhz switching frequency ? 2% output voltage tolerance ? 95% efficiency ? 2.5v and 3.3v ldo secondary voltage versions ? ultra-fast transient response ? any voltage? technology provides 72 output selections and shortens design cycles ? output voltage marginin g capability for easy sys- tem testing and qualification ? high reliability - lowest component count ? works with any external capacitive load (low esr, high esr) ? built-in undervoltage lockout, thermal protection, and current limit ? control ic and passive kit components are avail- able for high volume user sip package dip package smt package (tbd)
doc. no. mv-s102822-00, rev. b copyright@ 2006 marvell page 4 document classification: proprieta ry information april 4, 2006, advance o verview the 88mg875z-x/88mg876-x series 1 is a high-perfor- mance, non-isolated, dc-dc converter module for point-of-load (pol) applications. it functions as a syn- chronous step-down (buck) switching regulator in a small form factor. the module includes a proprietary marvell? integrated regulator device. the switching frequency for the regulator is 1 mhz, and no external components are required (except one voltage pro- gramming resistor, see section 2.1 "output voltage - any voltage? technology" on page 13 ). ultra-high conversion efficiency (typically 95%) allows for the use of the 88mg 875z-x/88mg876-x series without any heatsink. additionally, the 88mg875z-x/ 88mg876-x series includes an innovative single resis- tor method 2 to program the output voltage. this volt- age is defined by the user with an external resistor. the 88mg875z-x/88mg876-x se ries operates from an input voltage range of 3v to 5.5v, making the device well suited for portable applications. the output volt- age range is 0.72v to 3.63v, supporting future devices down to 65 nm geometries. other key features include an internal current limit, an undervoltage lockout, a thermal shutdown, and an ambient temperature range of -40c to 85c. a pplications ? point-of-load power supplies ? networking/datacom systems ? portable computing ? servers ? dsp power supplies ? lan/wan 1. the 88mg875z-x/88mg876-x series includes 88mg75z-s, 88mg875z-d, 88mg875z-t, 88MG876-S, 88mg876-d, and 88mg876-t. 2. patent pending d evice f eature d ifferences the table below summarizes the feature differences between 88mg875z, and 88mg876 features 88mg875z 88mg876 rated output current 5a 5a packages ? 12-pin sip ? 9-pin dip ? 9-pin smt ? 11-pin sip ? 8-pin dip ? 8-pin smt ldo ldo voltage option no ldo
copyright@ 2006 marvell doc. no. mv-s102822-00, rev. b april 4, 2006, advance document classifi cation: proprietary information page 5 table 1: product selector table part name description ldo output voltage output current package 88mg875b-s sip module: 5a rated output current with ldo 3.3v 5a 12-pin sip 88mg875b-d dip module: 5a rated output current with ldo 3.3v 5a 9-pin dip 88mg875b-t smt module: 5a rated out put current with ldo 3.3v 5a 9-pin smt 88mg875e-s sip module: 5a rated output current with ldo 2.5v 5a 12-pin sip 88mg875e-d dip module: 5a rated output current with ldo 2.5v 5a 9-pin dip 88mg875e-t smt module: 5a rated out put current with ldo 2.5v 5a 9-pin smt 88MG876-S sip module: 5a rated output current -- 5a 11-pin sip 88mg876-d dip module: 5a rated output current -- 5a 8-pin dip 88mg876-t smt module: 5a rated output current -- 5a 8-pin smt
88mg875z-x/88mg876-x 5a rated output current, non-isolated, step-down switching regulator module with anyvoltage? technology doc. no. mv-s102822-00, rev. b copyright ? 2006 marvell page 6 document classification: proprieta ry information april 4, 2006, advance table of contents s ection 1. s ignal d escription .............. .............. .............. .............. ........... 7 1.1 pin diagram................................................................................................................. ....7 1.2 pin description ............................................................................................................. 11 s ection 2. f unctional d escription ............... ................ ............... ........... 13 2.1 output voltage - any volt age? technology ...... ................ ................ ............. ..........13 2.2 output voltage margining..... .......................................................................................14 2.3 regulation and start-up...............................................................................................15 2.4 digital soft start .......................................................................................................... .15 2.5 undervoltage lockout (uvlo) ....................................................................................16 2.6 thermal shutdown .......................................................................................................16 2.7 pgood ....................................................................................................................... ...16 s ection 3. e lectrical s pecifications ............. .............. ............... ........... 17 3.1 absolute maximum ratings ........................................................................................17 3.2 recommended operating c onditions .......... ................. ................ ................ .............17 3.3 electrical characteristics. ............................................................................................18 3.4 startup waveforms......................................................................................................20 3.5 load transient response waveforms .......................................................................23 3.6 thermal shutdown .......................................................................................................24 3.7 switching waveforms ..................................................................................................24 3.8 efficiency.................................................................................................................. .....26 s ection 4. m echanical d rawings ................ ................ ................. ........... 27 4.1 mechanical drawings for 88mg875z-x ...... .................................................................27 4.2 mechanical drawings for 88mg876-x .........................................................................30 s ection 5. o rdering i nformation ................ ................ ................. ........... 32 5.1 ordering part numbers and package mark ings ........................................................32
copyright ? 2006 marvell doc. no. mv-s102822-00, rev. b april 4, 2006, advance document classifi cation: proprietary information page 7 signal description pin diagram section 1. signal description 1.1 pin diagram figure 1: 88mg875z-s package - component view figure 2: 88mg875z-d package - component view 12 45 789 61011 12 3 1: ldo 7: pset 2: sdi 8: vset 3: m i ssi ng pi n 9: gnd 4: enable 10: gnd 5: pgood 11: vout 6: vin 12: vout 88mg875z-s 1 2 4 3 567 8 9 1: gnd 6: sdi 2: pset 7: vset 3: vin 8: pgood 4 : enabl e 9 : vout 5: ldo 88mg875z-d
88mg875z-x/88mg876-x 5a rated output current, non-isolated, step-down switching regulator module with anyvoltage? technology doc. no. mv-s102822-00, rev. b copyright ? 2006 marvell page 8 document classification: proprieta ry information april 4, 2006, advance figure 3: 88mg875z-t packages - component view figure 4: connection block configuration sample for 88mg875z -s 1 2 3 45 6 7 8 9 1: gnd 6: sdi 2: pset 7: vset 3: vin 8: pgood 4: enabl e 9 : vout 5: ldo 88mg875z-t 88mg875z-s vout gnd vin en gnd 3v-5.5v vset pset optional load ldo load
copyright ? 2006 marvell doc. no. mv-s102822-00, rev. b april 4, 2006, advance document classifi cation: proprietary information page 9 signal description pin diagram figure 5: 88MG876-S package - component view figure 6: 88mg876-d package - component view 1345 8 67 10 911 1 : sdi 5 : vi n 9 : gnd 2: m i ssi ng pi n 6 : pset 1 0 : vout 3 : enabl e 7 : vset 1 1 : vout 4: pgood 8: gnd 2 88MG876-S 1 2 4 3 56 7 8 1: gnd 5: sdi 2: pset 6: vset 3: vin 7: pgood 4: enable 8: vout 88mg876-d
88mg875z-x/88mg876-x 5a rated output current, non-isolated, step-down switching regulator module with anyvoltage? technology doc. no. mv-s102822-00, rev. b copyright ? 2006 marvell page 10 document classification: proprieta ry information april 4, 2006, advance figure 7: 88mg876-t package - component view figure 8: connection block configuration sample for 88MG876-S 1: gnd 5: sdi 2 : pset 6 : vset 3: vi n 7: pgood 4 : enabl e 8 : vout 1 2 3 4 5 6 7 8 88mg876-t 88MG876-S vout gnd vin en gnd 3v-5.5v vset pset optional load
copyright ? 2006 marvell doc. no. mv-s102822-00, rev. b april 4, 2006, advance document classifi cation: proprietary information page 11 signal description pin description 1.2 pin description name pin description ldo_out 1 1. this pin is present in 88mg875z. secondary output voltage. connect directly to load with a short wide pcb trace. pset percent set. an external resistor is connected to the gr ound to trim the set voltage by the percentage value. see ta b l e 3 in the section 2.1 "output voltage - any voltage? technology" on page 13 for resistor values and percentage options. the total capacitance across this pin and gnd should be less than 25 pf. shorting this pin to ground, floating this pin, or using r vset >619k or r vset < 7.68k does not affect the set volt- age. a resistor with tolerance of 5% or better must be used. if this pin is not used, it is recom- mended that the pin be tied to gnd. gnd power ground. connect this pin to a suitable low-impedance ground plane. nc not connected. no pin. vset voltage set. an external resistor is connected to ground to set the output voltage of the switching regula- tor. see ta b l e 3 in the section 2.1 "output voltage - any voltage? technology" on page 13 for resistor values and output voltage options. the total capacitance across this pin and gnd should be less than 15 pf. shorting this pin to ground, floating this pin, or using r vset > 619k or r vset < 7.68k disables the switching reg- ulator. a resistor with tolerance of 5% or better must be used. vout output voltage. connect directly to load with a short wide pcb trace. vin 3v - 5.5v input voltage. en enable logic low ( 0.8v) disables the regulator. open collector will enable the regulator due to inter- nal pull-up resistor provided. the high signal has to be at least 20 s in duration to enable the regulator. tdo terminal data output. this pin is a special func tion pin. contact your marvell? representative for information otherwise this pin should be left floating. tdi terminal data input. this pin is a special function pin. contact your marvell? representative for information otherwise this pin should be left floating. pgood the power good pin (pg) is an acti ve-high, open-drain output pin. refer to section 2.7 for fur- ther details on the pgood pin.
88mg875z-x/88mg876-x 5a rated output current, non-isolated, step-down switching regulator module with anyvoltage? technology doc. no. mv-s102822-00, rev. b copyright ? 2006 marvell page 12 document classification: proprieta ry information april 4, 2006, advance table 2: pin number assignment table pin name 88mg875z-s 88mg875z -d/t 88MG876-S 88mg876-d/t ldo_out15- - sdi2615 gnd 9, 10 1 8, 9 1 missing pin 3 - 2 - vset8776 vout 11, 12 9 10, 11 8 vin6353 enable4434 pgood5847 pset7262
copyright ? 2006 marvell doc. no. mv-s102822-00, rev. b april 4, 2006, advance document classifi cation: proprietary information page 13 functional description output voltage - any voltage? technology section 2. functional description 2.1 output voltage - any voltage? technology the output voltage of the 88mg875z-x/88mg876-x se ries devices is programmed by using the look-up ta b l e 3 to select the resistor value for the vset and pset pins. the vset pin sets the output voltage, and the pset pin trims the set voltage to a percentage value. for example, to program 2.25v output, a 165k resistor is selected for the vset pin, and an 11k resistor is selected for the pset pin. the 165k resistor sets the output voltage to 2.5v and the 11k resistor trims the set voltage off by 10% (or -10%). using a resistor value grea ter than 619k or less than 7.68k for the vset pin disables the switching regulator and sets the sw pin to high impedance. using a resistor valu e greater than 619k or less than 7.68k for the pset pin does not affect the set voltage. using a vset resistor with value great er than 619 kohm or less than 7.68 k ohm disables the step-down switching regulator and sets the sw pin to high impedance. if the vset resistor's value is outside the 5% tolerance, the out- put can be either higher or lower than the set voltage. using a resistor value greater than 619 kohm or less than 7.68 kohm for the pset pin does not affect the set volt- age. when the pset pin is not used, it must be conn ected to ground . like the vset resist or, the percent value can be either high er or lower if the pset resistor's value is outside the 5% tolerance. table 3: any voltage programming table for 5% resistors pset -10.0% ?7.5% ?5.0% ?2.5% 2.5% 5.0% 7.5% 10.0% vset 11k 18k 30k 51k gnd 100k 160k 270k 470k 11k 0.720 0.740 0.760 0.780 0.800 0.820 0.840 0.860 0.880 18k 0.900 0.925 0.950 0.975 1.000 1.025 1.050 1.075 1.100 30k 1.080 1.110 1.140 1.170 1.200 1.230 1.260 1.290 1.320 51k 1.350 1.388 1.425 1.463 1.500 1.575 1.575 1.613 1.650 100k 1.620 1.665 1.710 1.755 1.800 1.890 1.890 1.925 1.980 160k 2.250 2.313 2.375 2.438 2.500 2.625 2.625 2.688 2.750 270k 2.700 2.775 2.850 2.925 3.000 3.150 3.150 3.225 3.300 470k 2.970 3.053 3.135 3.218 3.300 3.465 3.465 3.548 3.630
88mg875z-x/88mg876-x 5a rated output current, non-isolated, step-down switching regulator module with anyvoltage? technology doc. no. mv-s102822-00, rev. b copyright ? 2006 marvell page 14 document classification: proprieta ry information april 4, 2006, advance the vset and pset resistor are read once during start-up be fore the output voltage is turned on. after the output voltage is turned on, the vset and pset resisters are ignore d.the benefit of this is th at the output voltage toler- ance is not dependant upon the tolerance or th ermal characteristics of these resistors. 2.2 output voltage margining a useful application of the marvell? any voltage? technolo gy is ?output voltage margining?. voltage margining is commonly used during system qualificatio n to evaluate operation at ?corner? conditions of volt age, temperature etc. typically, output voltage will be offset up and down by some percentage (margin) of the nominal value. for the 88mg875z-x/88mg876-x series, the vset pin/resistor controls the nominal voltage of the switching regulator output while the pset pin/resistor controls the marg in voltage. as can be seen in ta b l e 3 , the pset pin allows the margin to be set as high as 10% above and as low as -10% below the nominal setpoint established by vset. depending on the value of the pset resistor intermediate points of 7.5%, 5% and 2.5% can also be accessed. for example, if an application calls for a nominal output voltage of 1.5v then ta b l e 3 prescribes a value of r1 for the vset resistor. this selection is shown in figure 9 connected to the vset pin. to offset the voltage above and below the nominal value, the pset pin can be used with re sistor values again from ta b l e 3 . additionally, switches s1 and s2 can be al ternately closed to select from the two resistors r3 and r2 (o ffset values) for pset. if more offsets are required more switches and resistors may be used. as shown in figure 9 , if s1 is closed and s2 opened a positive 5% offset would be added to the nominal 1.5v output yielding 1.575v. conversely, if s1 is opened and s2 closed the output would be offset to -5% from 1.5v, or 1.425v. finally with both s1 and s2 opened the output would return to the nominal 1.5v. thus volt age margining can be simply and reliably implemented with a minimum of components and design effort. table 4: any voltage programming table for 1% resistors pset -10.0% ?7.5% ?5.0% ?2.5% 2.5% 5.0% 7.5% 10.0% 11k 18.7k 31.6k 53.6k open / gnd 97.6k 165k 280k 475k vset gnd 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 11k 0.720 0.740 0.760 0.780 0.800 0.820 0.840 0.860 0.880 18.7k 0.900 0.925 0.950 0.975 1.000 1.025 1.050 1.075 1.100 31.6k 1.080 1.110 1.140 1.170 1.200 1.230 1.260 1.290 1.320 53.6k 1.350 1.388 1.425 1.463 1.500 1.538 1.575 1.613 1.650 97.6k 1.620 1.665 1.710 1.755 1.800 1.845 1.890 1.935 1.980 165k 2.250 2.313 2.375 2.438 2.500 2.563 2.625 2.688 2.750 280k 2.700 2.775 2.850 2.925 3.000 3.075 3.150 3.225 3.300 475k 2.970 3.053 3.135 3.218 3.300 3.383 3.465 3.548 3.630 open 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000
copyright ? 2006 marvell doc. no. mv-s102822-00, rev. b april 4, 2006, advance document classifi cation: proprietary information page 15 functional description regulation and start-up figure 9: output voltage margining 2.3 regulation and start-up the step-down switching regulator uses pulse width m odulation (pwm) and pulse frequency modulation (pfm) modes to regulate the output voltage using digital contro l. the mode of operation depend s on the level of output current and the output voltage. in steady states, the step-down switching regulator monitors the current flowing through the inductor to determine if the regulator is handling heavy or light load applications . for heavy load applications, the step-down regulator operates in the pwm mode (b and c) to minimize the ripp le current for optimum efficiency and to minimize the rip- ple output voltage. the step-down regulator operates in the pfm and discontinuous conduction mode (dcm) (a and d) to limit the switching action for optimum efficiency in light load applications. in this mode, the average out- put voltage is slightly higher than the average outp ut voltage for heavy transient load applications. figure 10: output voltage window 2.4 digital soft start during start-up, the 88mg875z-x/88mg876-x provides a soft start function. soft start reduces surge currents from input voltage and provides a well-controlled output voltage ri se characteristics. the rate of the output voltage start- up is limited by the value of the output capacitor and the internal current limit circuitry. this combination forces the output voltage to come up slowly, providing a soft-start characteristic. during soft start, the 88mg875z-x/88mg876-x feeds a consta nt current to the output ca pacitor in several steps. figure 11 shows the inductor current waveform during startup. the current limit is ramped up in 7 steps beginning at approximately 40% of the current limit rating and endi ng at 100% at 25 s per step. the buck regulator behaves like a current source during this time as the output ramps up slowly. 88mg876-x vout load gnd vin en gnd 3v-5.5v vset pset r1 r2 s1 s2 r3 typical v out pfm mode pwm moed pfm mode a b d d
88mg875z-x/88mg876-x 5a rated output current, non-isolated, step-down switching regulator module with anyvoltage? technology doc. no. mv-s102822-00, rev. b copyright ? 2006 marvell page 16 document classification: proprieta ry information april 4, 2006, advance 2.5 undervoltage lockout (uvlo) the 88mg875z-x/88mg876-x series incorporates undervolt age-lockout circuitry to disable the step-down regula- tor when the input voltage is below 2.75v (typical). the step-down regulator is enabled when the input voltage is above 2.85v (typical). 2.6 thermal shutdown if the junction temperature of the c ontrol ic on 88mg875z-x/88mg876-x series exceeds 150c (typical), the ther- mal shutdown circuitry disables the step-down regulator. the step-down regulator is enabled when the junction temperature falls to 120c (typical). 2.7 pgood the power good pin (pg) is an active-high, open-drain outp ut pin. it is asserted wh en the output voltage of the step-down regulator is below the threshold. when the out put voltage is above the threshold, the power good pin is de-asserted. setting the output voltage greater than 1.35v, the threshold voltage is 0.9% * vout (typical). setting the output voltage less than 1.32v, the threshold voltage is v out ? 130mv (typical). a built-in 25s (t delay ) delay is incorporated to prevent nuisance tripping. v out _ ldo v out_buck enable figure 11: start-up using the enable pin 2v/div 1v/div 2v/div 1 ms/div v pg 0v v pgh v pgl < t delay > t delay v pgth v buck
copyright ? 2006 marvell doc. no. mv-s102822-00, rev. b april 4, 2006, advance document classifi cation: proprietary information page 17 electrical specifications absolute maximum ratings section 3. electrical specifications 3.1 absolute maximum ratings stresses above those listed in absolute maximum ratings may ca use permanent device failure. functionality at or above those lim its is not implied. exposure to absolute maximum ratings for extended periods may affect device reliability. parameter symbol range units input voltage to gnd v in -0.3 to 6.0 v voltage set to gnd v set -0.6 to (v in + 0.3) v percentage set voltage to gnd v pset -0.6 to (v in + 0.3) v shutdown voltage to gnd v shdn -0.6 to (v in + 0.3v) v storage temperature range t stor -65 to +150 c peak switch current i peak 7.5 a rated output current i out 5a ldo output current (peak) i out_ldo 450 ma 3.2 recommended operating conditions 1 1. this device is not guaranteed to f unction outside the specified operating range. parameter symbol range units input voltage v in 3 to 5.5 v operating temperature range 2 2. this device is guaranteed to me et the specifications from 0c to 70c. any specifications that per- tains to the operating temperature range -40c to +85c are assured by design, characterization, and correlation with stat istical process controls. t op -40 to +85 c
88mg875z-x/88mg876-x 5a rated output current, non-isolated, step-down switching regulator module with anyvoltage? technology doc. no. mv-s102822-00, rev. b copyright ? 2006 marvell page 18 document classification: proprieta ry information april 4, 2006, advance 3.3 electrical characteristics the following applies unless otherwise noted: v in = 5.0v. t a = 25c . bold values indicate -40c t a 85c . parameter symbol condition min typ max units input voltage range v in 3.0 5.5 v total quiescent current (no load) i in 10 ma shutdown supply current i in v shdn = v in = 5.5v 1 10 a undervoltage lockout v uvlo high threshold, v in increasing 2.85 3.00 v low threshold, v in decreasing 2.65 2.75 v enable input voltage logic v en enable regulator (5v) 3 v enable regulator (3.3v) 2.4 v disable regulator (3.3v/5v) 0.8 v shutdown input current i shdn v shdn = gnd or 5.5v 1 a over-temperature thermal shutdown t ots t j increasing (disable regulator) 150 c t j decreasing (enable regulator) 120 c switching frequency f sw 1mhz output voltage tolerance v out 1% line regulation i out = 5a 0.2 % v in = 3.0v to 5.5v load regulation v out = 1.5v i out = 0.5a to 5.0a 0.5 % input current ripple i in ripple v out = 0.8v i out = 5a (without external filter) 10.5 ma pk-pk input voltage ripple v in ripple 50.0 mv pk-pk output voltage noise v in = 5.0v v out = 1.8v i out = 5.0a 6.0 mv rms 11.0 mv pk-pk electrical material rating flammability rating ul94v-0 material type fr4-pcb
copyright ? 2006 marvell doc. no. mv-s102822-00, rev. b april 4, 2006, advance document classifi cation: proprietary information page 19 electrical specifications electrical characteristics table 5: ldo output elect rical characteristics parameter symbol condi tion min typ max units line regulation ldo i out = 800 ma 0.2 % v in = -4.0v to 5.5v load regulation ldo i out = 10 ma to 800 ma 0.5 %
88mg875z-x/88mg876-x 5a rated output current, non-isolated, step-down switching regulator module with anyvoltage? technology doc. no. mv-s102822-00, rev. b copyright ? 2006 marvell page 20 document classification: proprieta ry information april 4, 2006, advance 3.4 startup waveforms note: there is a delay (3.5 ms typ) before the output volt age turns on. the actual threshold is before delay. v out _ ldo v out_buck enable start-up using the enable pin 2v/div 1v/div 2v/div v out_ldo v out_buck enable turn off using the enable pin 2v/div 1v/div 2v/div 1 ms/div 1 ms/div v in = 5.0v t dly ~ 4 ms v in = 5.0v v ldo = 3.3v v ldo = 3.3v v buck = 1.2v v buck = 1.2v i load = no load i load = no load v out_buck enable enable threshold at v in = 3.0v 1v/div 2v/div v out_buck enable enable threshold at v in = 5.0v 1v/div 2v/div 10 ms/div 10 ms/div v in = 3.0v v th = 1.47v (note) v in = 5.0v v th = 2.33v (note) v ldo = 3.3v v ldo = 3.3v v buck = 1.2v v buck = 1.2v i load = no load i load = no load
copyright ? 2006 marvell doc. no. mv-s102822-00, rev. b april 4, 2006, advance document classifi cation: proprietary information page 21 electrical specifications startup waveforms v out_ldo v out_buck v in vin soft start 2v/div 1v/div 2v/div v in v ldo v buck vin hot plug 5v/div 2v/div 1v/div 2 ms/div 1 ms/div v in = 5.0v ldo start = 1.7v v in = 5.0v t dly = 4 ms v ldo = 3.3v v ldo = 3.3v v buck = 1.2v v buck = 1.2v i load = no load i load = no load v out_buck i_l buck rise time 1v/div 2a/div v out_ldo 3.3v ldo rise time 1v/div 20 s/div 50 s/div v in = 5v t rise = 75 sv in = 5.0v t rise = 100 s v out = 3.3v v ldo = 3.3v i load = 7.5a _ _
88mg875z-x/88mg876-x 5a rated output current, non-isolated, step-down switching regulator module with anyvoltage? technology doc. no. mv-s102822-00, rev. b copyright ? 2006 marvell page 22 document classification: proprieta ry information april 4, 2006, advance i_l soft start current limit 2a/div v out_buck v in uvlo threshold 1v/div 200mv/div 50 s/div 100 ms/div v in = 5.0v i limit = 7.5a v ldo = 3.3v v hth = 2.966v v ldo = 3.3v v buck = 1.2v v lth = 2.792v v buck = 1.2v i load = no load temperature derating 0 1 2 3 4 5 6 25 35 45 55 65 75 85 temperature (degree c) output current (amps) still air 100 lfm _ _ _
copyright ? 2006 marvell doc. no. mv-s102822-00, rev. b april 4, 2006, advance document classifi cation: proprietary information page 23 electrical specifications load transient response waveforms 3.5 load transient response waveforms v out i load load transient response 100mv/div 1a/div v out i load double-pulsed load response 100mv/div 1a/div 20 s/div 20 s/div v in = 5.0v i load = 0.5a to 5a v in = 5.0v i load = 0.5a to 5a v buck = 1.0v t rise = 11 a/ sv out = 1.0v t rise = 11 a/ s t fall = 176 a/ st fall = 176 a/ s v sw v out i load rise time 5v/div 100mv/div 1a/div v out i load fall time 100mv/div 1a/div 20 s/div 20 s/div v in = 5.0v i load = 0.5a to 5a v in = 5.0v i load = 0.5a to 5a v buck = 1.0v t rise = 11 a/ sv buck = 1.0v t rise = 11 a/ s t fall = 176 a/ st fall = 176 a/ s _ _ _ _
88mg875z-x/88mg876-x 5a rated output current, non-isolated, step-down switching regulator module with anyvoltage? technology doc. no. mv-s102822-00, rev. b copyright ? 2006 marvell page 24 document classification: proprieta ry information april 4, 2006, advance 3.6 thermal shutdown 3.7 switching waveforms v out_buck t a g75 lower thermal shutdown 1v/div 100c/div v out_buck t a g75 upper thermal shutdown 1v/div 100c/div 5 ms/div 5 ms/div v in = 5.0v i load = 5.0a v in = 5.0v i load = 5.0a v buck = 1.2v l th = 107.65 c v buck = 1.2v u th = 150.68 c v sw i_l v out 20 mhz v in pwm mode 2v/div 1a/div 5mv/div 100mv/div v sw v out i_l dcm mode 2v/div 20mv/div 1a/div 500 ns/div 5 s/div v in = 5.0v v in(pk-pk) = 110 mv v in = 5.0v i ind(pk) = 1.33a v buck = 1.5v i ind(pk-pk) = 1.5a v buck = 1.5v freq = 105 khz i out = 5a i ind(pk) = 5.87a i out = 50 ma v out(pk-pk) = 7.62 mv freq = 950 khz v out(pk-pk) = 3. mv 2 5 _ _ _ _ _ _ _ _
copyright ? 2006 marvell doc. no. mv-s102822-00, rev. b april 4, 2006, advance document classifi cation: proprietary information page 25 electrical specifications switching waveforms note: for repeatability of measuring output ripple (v out(p-p) ), the test procedure is to set the scope bandwidth to 20 mhz and use a coax cable with very short leads terminated into 50 . the coax leads must be routed as far as possible from the switching node. v out 20 mhz pwm mode output ripple 10mv/div v sw v out i_l dcm mode 2v/div 20mv/div 1a/div 10 ms/div 500 ns/div v in = 5.0v v out(pk-pk) = 9.79.mv v in = 5.0v freq ringing = 5.09 mhz v ldo = 3.3v v ldo = 3.3v v buck = 1.5v v buck = 1.5v i load = 5.0a i load = 50 mv _ _ _
88mg875z-x/88mg876-x 5a rated output current, non-isolated, step-down switching regulator module with anyvoltage? technology doc. no. mv-s102822-00, rev. b copyright ? 2006 marvell page 26 document classification: proprieta ry information april 4, 2006, advance 3.8 efficiency efficiency vs. output current v in = 5.0v @ 25 c efficiency vs. output current v in = 3.3v @ 25 c 50 60 70 80 90 100 012345 output current (a) efficiency (%) 3.3v 2.5v 1.8v 1.2v 1.0v 0.8v 50 60 70 80 90 100 012345 output current (a) efficiency (%) 3.3v 2.5v 1.8v 1.2v 1.0v 0.8v
copyright ? 2006 marvell doc. no. mv-s102822-00, rev. b april 4, 2006, advance document classifi cation: proprietary information page 27 mechanical drawings mechanical drawings for 88mg875z-x section 4. mechanical drawings 4.1 mechanical drawings for 88mg875z-x figure 12: 88mg875z-s mechanical dimensions (sip package) 0.047(1.19) max. pcb 0.025(0.64) (2.16) (2.16) (2.16) (2.16) (2.16) (2.16) (2.16) (2.16) 11- ? 0.0287(0.71) 1 245 789 61011 (2.16) 12 3 top view side view
88mg875z-x/88mg876-x series 5a rated output current, non-isolated, step-down switching regulator module with anyvoltage? technology doc. no. mv-s102822-00, rev. b copyright ? 2006 marvell page 28 document classification: proprieta ry information april 4, 2006, advance figure 13: 88mg875z-d mechanical dimensions (dip package) 9- ? 0. 046( 1. 17) (3.18) (3.18) ( 3. 18) (1.52) 1 2 4 3 567 8 9 0. 495( 12. 57) pi n( 9 x) round pcb top view side view
copyright ? 2006 marvell doc. no. mv-s102822-00, rev. b april 4, 2006, advance document classifi cation: proprietary information page 29 mechanical drawings mechanical drawings for 88mg875z-x figure 14: 88mg875z-t mechanical di mensions (smt package) 0.984(25.00) 0.354(9.00) 1.104(28.04) 0.125 0.495(12.57) (3.18) (3.18) 0.125 (3.18) 0.125 0.059(1.51) 0.197(5.00) 0.060(1.52) 1 2 3 45 6 7 8 9 pcb top view side view 9x rect 0.079(2.0)by 0.099(2.52)pad bottom layer 9x dia 0.079(2.0)pad top layer for test point only 0.150(3.81) 0.032(0.81)
88mg875z-x/88mg876-x series 5a rated output current, non-isolated, step-down switching regulator module with anyvoltage? technology doc. no. mv-s102822-00, rev. b copyright ? 2006 marvell page 30 document classification: proprieta ry information april 4, 2006, advance 4.2 mechanical drawings for 88mg876-x figure 15: 88MG876-S mechanical dimensions (sip package) (2.16) (2.16) (2.16) (2.16) (2.16) (2.16) (2.16) (2.16) 10- ?0. 0287( 0. 71) 1345 8 67 10 911 2 0. 158( 4. 01) 0. 025( 0. 64) 0. 032( 0. 81) 0. 047( 1. 19) m ax. pcb 0. 150( 3. 81) top view side view
copyright ? 2006 marvell doc. no. mv-s102822-00, rev. b april 4, 2006, advance document classifi cation: proprietary information page 31 mechanical drawings mechanical drawings for 88mg876-x figure 16: 88mg876-d mechanical dimensions (dip package) figure 17: 88mg876-t mechanical dimensions (smt package) 8- ? 0.046(1.17) 0.750(19.06) 0.125 (3.18) 0.060(1.51) 0.125 (3.18) 0.125 0.495(12.57) 0.125 (3.18) (3.18) 0.060(1.52) 0.250(6.36) (3.18) 0.125 0.870(22.10) 1 2 4 3 56 7 8 0.215(5.46) p c b top view side view 0.750(19.06) 0.125 (3.18) 0.060(1.51) 0.125 (3.18) 0.125 0.495(12.57) 0.125 (3.18) (3.18) 0.060(1.52) 0.250(6.36) (3.18) 0.125 0.870(22.10) 1 2 3 45 6 7 8 pcb top view side view 8x dia 0.079(2.0)pad top layer for test point only 8x rect 0.079(2.0) by 0.099(2.52)pad bottom layer 0.150(3.81) 0.032(0.81)
88mg875z-x/88mg876-x series 5a rated output current, non-isolated, step-down switching regulator module with anyvoltage? technology doc. no. mv-s102822-00, rev. b copyright ? 2006 marvell page 32 document classification: proprieta ry information april 4, 2006, advance section 5. ordering information 5.1 ordering part numbers and package markings figure 18 shows the typical ordering part numbering scheme for the mds-g76 part. markings for the other vari- ants are similar. for complete ordering information, contact your marvell fae or sales representative. figure 18: 88mg875z sample ordering part number figure 19: 88mg876 sample ordering part number 88mg875za0-x part number internal marvell code b = 3.3v, e = 2.5v voltage option ldo package code 88mg876 part number -a0-x internal marvell code package code
copyright ? 2006 marvell doc. no. mv-s102822-00, rev. b april 4, 2006, advance document classifi cation: proprietary information page 33 ordering information ordering part numbers and package markings the standard ordering part number for the respective solution is shown in ta b l e 6 . figure 20 shows a typical package marking and pin 1 location for the 88mg876 part. markings for the other vari- ants are similar. figure 20: 88mg876 package marking table 6: ordering part numbers part number switcher output voltage ldo output voltage rated output current ambient temperature range 1 1. any specifications that pertai ns to the operating temperature ra nge -40c to 85c are assured by design, characterization, and correlation with statistical process controls. package 88mg875b-s programmable 3.3v 5a -40 c to 85 c 12-pin sip 88mg875b-d programmable 3.3v 5a -40 c to 85 c9-pin dip 88mg875b-t programmable 3.3v 5a -40 c to 85 c9-pin smt 88mg875e-s programmable 2.5v 5a -40 c to 85 c 12-pin sip 88mg875e-d programmable 2.5v 5a -40 c to 85 c9-pin dip 88mg875e-t programmable 2.5v 5a -40 c to 85 c9-pin smt 88MG876-S programmable -- 5a -40 c to 85 c 11-pin sip 88mg876-d programmable -- 5a -40 c to 85 c8-pin dip 88mg876-t programmable -- 5a -40 c to 85 c8-pin smt g76-x yww$ lot code part number package code work week last digit of year
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