ZSPM4022-06 datasheet(2/38 Pages) ETC2

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ZSPM4022-06

12V/6A Synchronous DC/DC Buck Regulator

stored, or used without the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice.

Brief Description

The ZSPM4022-06 is a constant-frequency, syn-

chronous DC/DC buck regulator featuring adaptive

on-time control architecture. The ZSPM4022-06

operates over a 4.5V to 19V supply range (12V typi-

cal). It has an internal linear regulator that provides a

regulated 5V to power the internal control circuitry.

The ZSPM4022-06 operates at a constant 600kHz

(typical)

switching

frequency

continuous-

conduction mode and can be used to provide up to

6A of output current. The output voltage is adjust-

able from 5.5V down to 0.8V.

Under medium to heavy loads, the ZSPM4022-06

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

variable-frequency, discontinuous mode operation

with its ultra-light-load architecture.

The ZSPM4022-06 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

ZSPM4022-06 includes a power good (PG) output to

allow simple sequencing.

ZSPM4022-06 Typical Application

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., VIN = 19V

and VOUT = 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 19V

 Output current: up to 6A

 Switching frequency: 600kHz

 Junction temperature: –40

C to +125C

 28-pin 5mm

 6mm QFN package

100

OUTPUT CURRENT (A)

Efficiency (VIN = 12V)

vs. Output Current

5.0V

3.3V

2.5V

1.8V

1.5V

1.2V

1.0V

0.9V

0.8V

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