Data brief

For further information contact your local STMicroelectronics sales office.

November 2010

Doc ID 18215 Rev 1

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STEVAL-ISA052V1

High efficiency step-down controller with embedded 2 A LDO

regulator demonstration board based on the PM6675S

Features

time loop control

mode

supported

Description

The STEVAL-ISA052V1 demonstration board is

based on the PM6675S device which consists of

a single high efficiency step-down controller and

an independent low drop-out (LDO) linear

regulator.

The constant on-time (COT) architecture assures

fast transient response supporting both

electrolytic and ceramic output capacitors. An

embedded integrator control loop compensates

the DC voltage error due to the output ripple.

Selectable low-consumption mode allows the

highest efficiency over a wide range of load

conditions. The low-noise mode sets the minimum

switching frequency to 33 kHz for audio-sensitive

applications. The LDO linear regulator can sink

and source up to 2 Apk. Two fixed current limits

(±1 A and ±2 A) can be chosen.

An active soft-end is independently performed on

both the switching and the linear regulator outputs

when disabled.

STEVAL-ISA052V1

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