Data brief

For further information contact your local STMicroelectronics sales office.

July 2009

Doc ID 15977 Rev 1

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STEVAL-ISA049V2

Synchronous dual buck converter with inhibit

demonstration board based on the ST2S06B

Features

DC-DC converter

and power ON delay of 50-100 µs

overtemperature range

Description

This demonstration board is based on the

ST2S06B, a dual synchronous step-down DC-DC

converter optimized for powering low-voltage

digital cores in ODD applications and, generally,

used to replace the high current linear solution

when the power dissipation may cause a high

heating of the application environment.

It provides up to 0.5 A over an input voltage range

of 2.5 V to 5.5 V.

A high switching frequency (1.5 MHz) allows the

use of tiny surface-mount components. A resistor

divider to set the output voltage value, an inductor

and two capacitors are required for every channel.

In addition, a low output ripple is guaranteed by

the current mode PWM topology and by the use

of low ESR surface-mount ceramic capacitors.

The demoboard is thermal protected and current

limited to prevent damage due to accidental short-

circuit.

STEVAL-ISA049V2

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