for more information, contact zmdi via analog@zmdi.com . zspm4023 - 09 24v/9 a synchronous dc/dc buck regulator ? 2013 zentrum mikroelektronik dresden ag rev . 1.00 october 1 7 , 2013. all rights reserved. the material c o ntained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. the information furnished in this publication is sub ject to changes without notice. brief description the zspm4023 - 09 is a constant - frequency, syn - chronous dc/dc buck regulator featuring adaptive on - time control architecture. the zspm4023 - 09 operates over a 4.5v to 28 v supply range ( 24 v typi - cal). it has an internal linear regulator that provides a regulated 5v to power the internal control circuitry. the zspm4023 - 09 operates at a constant 600khz (typical) switching frequency in continuous - conduction mode and can be used to provide up to 9 a of output current. the output voltage is adjust - able from 5.5v down to 0.8v. under medium to heavy loads, the zspm4023 - 09 provides high efficiency and ultra - fast transient res - ponse via its rapid - control architecture. under light load conditions, it maintains high efficiency and a superior transient res ponse by transitioning to variable - frequency, discontinuous mode operation with its ultra - light - load architecture . the zspm4023 - 09 offers a full suite of protection features to ensure protection of the ic during fault conditions. these include under - volta ge lockout to ensure proper operation under power - sag con - ditions ; thermal shutdown ; internal soft - start to reduce inrush current ; foldback current limit ing; and hiccup mode short - circuit protection. the zspm4023 - 09 includes a power good (pg) output to a llow simple sequencing. zspm4023 - 09 typical application benefits ? ultra - light l oad efficiency C up to 80% at 10ma ? up to 95% efficiency ? f eedback reference accuracy as high as 1% features ? rapid - control architecture enables operation with a high input/output voltage ratio ( e.g., v in = 28 v and v out = 0.8v) and small output capacitance ? adjustable output voltage from 0.8v to 5.5v ? universally compatible with most output capacitors stable with zero to high esr ? power good (pg) output ? foldback current limit ing and hiccup mode short - circuit protection ? safe start - up into pre - biased loads available support ? evaluation kit ? support d ocumentation physical characteristics ? input voltage range: 4.5v to 28 v ? output current: up to 9 a ? switching frequency: 600khz ? junction temperature: C 40 ? c to +125 ? c ? 28 - pin 5mm ? 6mm qfn package efficiency (v in = 24v) vs. output current 50 55 60 65 70 75 80 85 90 95 0 3 6 9 12 output current (a) efficiency (%) 5.0v 3.3v 2.5v 1.8v 1.5v 1.2v 1.0v 0.9v 0.8v v in = 24v
zspm4023 - 09 24v/9 a synchronous dc/dc buck regulator ? 2013 zentrum mikroelektronik dresden ag rev. 1.00 october 1 7 , 2013. all rights reserved. the material c o ntained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. typical applications ? servers, work stations ? routers, switches, and telecom equipment ? base stations zspm4023 - 09 functional diagram ordering information product sales code description package zspm4023 aa1w0 9 zspm4023 - 09 qfn28 5mmx6mm temperature range: C 40 ? c to +125 ? c 7 reel with 1000 ics zspm4023 - 09 - kit evaluation kit for zspm4023 - 09 , including zspm4023 - 09 evaluation board. kit sales and further information www.zmdi.com analog@zmdi.com zentrum mikroelektronik dresden ag global headquarters grenzstrasse 28 01109 dresden, germany central office: phone +49.351.8822.0 fax +49.351.8822.600 zmd america, inc. 1525 mccarthy blvd., #212 milpitas, ca 95035 - 7453 usa usa phone +855.275.9634 zentrum mikroelektronik dresden ag, japan office 2nd floor, shinbashi tokyu bldg. 4 - 21 - 3, shinbashi, minato - ku tokyo, 105 - 0004 japan zmd far east, ltd. 3f, no. 51, sec. 2, keelung road 11052 taipei taiwan zentrum mikroelektronik dresden ag, korea office u - space 1 building 11th floor, unit ja - 1102 670 sampyeong - dong bundang - gu, seongnam - si gyeonggi - do, 463 - 400 korea phone +82.31.950.7679 fax + 82.504.841.3026 phone +408.883.6310 fax +408.883.6358 phone +81.3.6895.7410 fax +81.3.6895.7301 phone +886.2.2377.8189 fax +886.2.2377.8199 european technical support phone +49.351.8822.7.772 fax +49.351.8822.87.772 disclaimer : this information applies to a product under development. its characteristics and specifications are subject to change without notice. zentrum mikroelek tronik dresden ag (zmd ag) assumes no obligation regarding future manufacture unless otherwise agreed to in writing. the information furnished hereby is believed to be true and accurate. however, under no circumstances shall zmd ag be liable to a ny customer, licensee, or any other third party for any special, indirect, incidental, or consequential damages of any kind or natu re whatsoever arising out of or in any way related to the furnishing, performance, or use of this technical data. zmd ag hereby expressly disclaims any liabilit y of zmd ag to any customer, licensee or any other third party, and any such customer, licensee and any other third party hereby waives any liability of zmd ag for any damages in connection with or arising out of the furnishing, performance or use of this technical data, whether based on contract, warranty, tort (including negligence), strict liabili ty, or otherwise. european sales (stuttgart) phone +49.711.674517.55 fax +49.711.674517.87955
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