ZSPM4023-12 Datasheet, PDF (1/3 Pages) List of Unclassifed Manufacturers – 24V/12A Synchronous DC/DC Buck Regulator

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.
ZSPM4023-12 Typical Application
For more information, contact ZMDI via [e-mail].
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: –40C to +125C
 28-pin 5mm  6mm QFN package
Efficiency (V_IN = 24V)
vs. Output Current
95
90
5.0V
3.3V
85
2.5V
80
1.8V
75
1.5V
1.2V
70
1.0V
0.9V
65
0.8V
60
55
50
0
VIN = 24V
3
6
9
12
15
OUTPUT CURRENT (A)
© 2013 Zentrum Mikroelektronik Dresden AG — Rev. 1.00 — October 17, 2013. All rights reserved. The material contained herein may not be reproduced, adapted, merged,
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