ZSPM4023-12
24V/12A Synchronous DC/DC Buck Regulator
Brief Description
The ZSPM4023-12 is a constant-frequency, syn-
chronous DC/DC buck regulator featuring adaptive
on-time control architecture. The ZSPM4023-12
operates over a 4.5V to 28V supply range (24V typi-
cal). It has an internal linear regulator that provides a
regulated 5V to power the internal control circuitry.
The ZSPM4023-12 operates at a constant 600kHz
(typical) switching frequency in continuous-
conduction mode and can be used to provide up to
12A of output current. The output voltage is adjust-
able from 5.5V down to 0.8V.
Under medium to heavy loads, the ZSPM4023-12
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 response by transitioning to
variable-frequency, discontinuous mode operation
with its ultra-light-load architecture.
The ZSPM4023-12 offers a full suite of protection
features to ensure protection of the IC during fault
conditions. These include under-voltage lockout to
ensure proper operation under power-sag con-
ditions; thermal shutdown; internal soft-start to
reduce inrush current; foldback current limiting; and
“hiccup” mode short-circuit protection. The
ZSPM4023-12 includes a power good (PG) output to
allow simple sequencing.
Benefits
Ultra-light load efficiency – up to 80% at 10mA
Up to 95% efficiency
Feedback reference accuracy as high as ±1%
Features
Rapid-control architecture enables operation with
a high input/output voltage ratio (e.g., V
IN
= 28V
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 limiting and “hiccup” mode
short-circuit protection
Safe start-up into pre-biased loads
Available Support
Evaluation Kit
Support documentation
Physical Characteristics
Input voltage range: 4.5V to 28V
Output current: up to 12A
Switching frequency: 600kHz
Junction temperature: –40C to +125C
28-pin 5mm
6mm QFN package
Efficiency (V
IN
= 24V)
vs. Output Current
5.0V
3.3V
2.5V
1.8V
1.5V
1.2V
1.0V
0.9V
0.8V
ZSPM4023-12 Typical Application
95
90
85
EFFICIENCY (%)
80
75
70
65
60
55
50
0
3
6
9
12
V
IN
= 24V
15
OUTPUT CURRENT (A)
For more information, contact ZMDI via
Analog@zmdi.com.
© 2013 Zentrum Mikroelektronik Dresden AG — Rev. 1.00 — October 17, 2013.
All rights reserved. The material contained 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 subject to changes without notice.
ZSPM4023-12
24V/12A Synchronous DC/DC Buck Regulator
ZSPM4023-12
Functional Diagram
Typical Applications
Servers, work stations
Routers, switches, and telecom
equipment
Base stations
Ordering Information
Product Sales Code
ZSPM4023AA1W12
ZSPM4023-12-KIT
Description
ZSPM4023-12 QFN28 5mmx6mm — Temperature range: –40C to +125C
Evaluation Kit for ZSPM4023-12, including ZSPM4023-12 Evaluation Board.
Package
7” reel with 1000 ICs
Kit
Sales and Further Information
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
Phone +408.883.6310
Fax
+408.883.6358
www.zmdi.com
Zentrum Mikroelektronik
Dresden AG, Japan Office
2nd Floor, Shinbashi Tokyu Bldg.
4-21-3, Shinbashi, Minato-ku
Tokyo, 105-0004
Japan
Phone +81.3.6895.7410
Fax
+81.3.6895.7301
ZMD FAR EAST, Ltd.
3F, No. 51, Sec. 2,
Keelung Road
11052 Taipei
Taiwan
Analog@zmdi.com
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 +886.2.2377.8189
Fax
+886.2.2377.8199
European Technical Support
Phone +49.351.8822.7.772
Fax
+49.351.8822.87.772
European Sales
(Stuttgart)
Phone +49.711.674517.55
Fax
+49.711.674517.87955
DISCLAIMER: This information applies to a product under development. Its characteristics and specifications are subject to change without notice.
Zentrum Mikroelektronik 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 any customer,
licensee, or any other third party for any special, indirect, incidental, or consequential damages of any kind or nature 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 liability 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 liability, or otherwise.
© 2013 Zentrum Mikroelektronik Dresden AG — Rev. 1.00 — October 17, 2013.
All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner.
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