ST2S06 Datasheet, PDF (1/18 Pages) STMicroelectronics – Synchronous rectification

ST2S06
Dual synchronous rectification with reset or inhibit, 0.5 A, 1.5 MHz
adjustable step-down switching regulator
Datasheet - production data
QFN12L (4 x 4 mm)
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_DS(ON) 150 m (typ.)
 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.
Order codes
ST2S06A33PQR
ST2S06BPQR
Table 1. Device summary
Package
QFN12L (4 x 4 mm)
Packaging
Tape and reel
May 2013
This is information on a product in full production.
DocID13866 Rev 6
1/18
www.st.com