April 2008

Rev 7

1/20

ST1S06xx

Synchronous rectification with inhibit, 1.5 A, 1.5 MHz fixed or

adjustable, step-down switching regulator

Features

DC converter

over temperature range

Description

The ST1S06 is a step down DC-DC converter

optimized for powering low-voltage digital core in

HDD applications and, generally, to replace the

high current linear solution when the power

dissipation may cause an high heating of the

application environment. It provides up to 1.5 A

over an input voltage range of 2.7 V to 6 V. An high

switching frequency (1.5 MHz) allows the use of

tiny surface-mount components: as well as the

resistor divider to set the output voltage value,

only an inductor and two capacitors are required.

Besides, a low output ripple is guaranteed by the

current mode PWM topology and by the use of low

ESR SMD ceramic capacitors. The device is

thermal protected and current limited to prevent

damages due to accidental short circuit. The

ST1S06 is available in DFN6D 3x3 package.

DFN6D (3x3 mm)

Table 1.

Device summary

Part numbers

Order codes

Package

ST1S06

ST1S06PUR

DFN6D (3x3 mm)

ST1S06A

ST1S06APUR

DFN6D (3x3 mm)

ST1S06XX12

ST1S06PU12R

DFN6D (3x3 mm)

ST1S06XX33

ST1S06PU33R

DFN6D (3x3 mm)

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