July 2009

Doc ID 13866 Rev 4

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18

ST2S06A33

ST2S06B

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

adjustable step-down switching regulator

Features

DC-DC converter

and power ON delay of 50-100 µs

over temperature range

Description

The ST2S06 is a dual step-down DC-DC

converter optimized for powering low-voltage

digital cores in ODD applications and, generally,

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 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 device is

thermally protected and current limited to prevent

damage due to accidental short circuit. The

ST2S06 series is available in the QFN12L (4x4

mm) package.

QFN12L (4x4 mm)

Table 1.

Device summary

Order code

Package

Packaging

ST2S06A33PQR

QFN12L (4x4 mm)

Tape and reel

ST2S06BPQR

QFN12L (4x4 mm)

Tape and reel

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