ST2S06A33 Datasheet, PDF (1/21 Pages) STMicroelectronics – Dual synchronous rectification with reset or inhibit, 0.5 A, 1.5 MHz adjustable step-down switching regulator

ST2S06A33
ST2S06B - ST2S06D33
Dual synchronous rectification with reset or inhibit, 0.5 A, 1.5 MHz
adjustable step-down switching regulator
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 and D versions
■ Inhibit function for B version
■ Internal soft start for start-up 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 mA
over temperature range
■ R_DS(ON) 150 mΩ (typ.)
■ Uses tiny capacitors and inductors
■ Available in QFN12L (4x4 mm)
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
QFN12L (4x4 mm)
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.
Table 1. Device summary
Order code
ST2S06APQR⁽¹⁾
ST2S06A33PQR
ST2S06D33PQR
ST2S06BPQR
1. Available on request.
March 2008
Package
QFN12L (4x4 mm)
QFN12L (4x4 mm)
QFN12L (4x4 mm)
QFN12L (4x4 mm)
Rev 3
Packaging
Tape and reel
Tape and reel
Tape and reel
Tape and reel
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