This is information on a product in full production.

May 2013

DocID13866 Rev 6

1/18

ST2S06

Dual synchronous rectification with reset or inhibit, 0.5 A, 1.5 MHz

adjustable step-down switching regulator

Datasheet

Features

 Step-down current mode PWM (1.5 MHz) DC-

DC converter

 Fixed or adjustable output voltage from 0.8 V

 2% DC output voltage tolerance

 Synchronous rectification

 Reset function for A version

 Inhibit function for B version

 Internal soft start for startup current limitation

and power ON delay of 50-100 µs

 Typical efficiency: > 90%

 0.5 A output current capability

 Non-switching quiescent current: max 1.2 mA

over temperature range

 R

 Uses tiny capacitors and inductors

 Available in QFN12L (4x4 mm)

Description

The ST2S06A33 and ST2S06B are dual step-

down DC-DC converters optimized for powering

low-voltage digital cores in ODD applications and,

generally, to replace high current linear solutions

when the power dissipation may cause 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 of 1.5 MHz allows the

use of tiny surface-mount components as well as

a resistor divider to set the output voltage value.

Only an inductor and two capacitors are required.

A low output ripple is guaranteed by the current

mode PWM topology and the utilization of low

ESR SMD ceramic capacitors. The devices are

thermally protected and current-limited to prevent

damage due to accidental short-circuit. The

ST2S06A33 and ST2S06B are available in the

QFN12L (4x4 mm) package.

QFN12L (4 x 4 mm)

Table 1. Device summary

Order codes

Package

Packaging

ST2S06A33PQR

QFN12L (4 x 4 mm)

Tape and reel

ST2S06BPQR

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