ST1S06 Datasheet, PDF (1/19 Pages) STMicroelectronics – Synchronous rectification with inhibit, 1.5A, 1.5 MHz fixed or adjustable, step-down switching regulator in DFN6 3x3

ST1S06
Synchronous rectification with inhibit, 1.5A, 1.5 MHz fixed or
adjustable, step-down switching regulator in DFN6 3x3
General features
■ Step-down current mode PWM (1.5MHz) DC-
DC converter
■ 2% DC output voltage tolerance
■ Synchronous rectification
■ Inhibit function
■ Internal soft start
■ Typical efficiency:> 90%
■ 1.5A Output current capability
■ Not switching quiescent current: max 1.5mA
over temperature range
■ R_DS ON typ150mΩ
■ Uses tiny capacitors and inductors
■ Operative junction temp. -30°C to 125°C
■ Available in DFN6 3x3 exposed pad
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
DFN6 (3x3mm)
high current linear solution when the power
dissipation may cause an high heating of the
application environment. It provides up to 1.5A
over an input voltage range of 2.7V to 6V. An high
switching frequency (1.5MHz) 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
E.S.R. SMD ceramic capacitors. The device is
thermal protected and current limited to prevent
damages due to accidental short circuit. The
ST1S06 is available in DFN6 3x3 package.
Order code
Part number
ST1S06PM
ST1S06PU
ST1S06APM
ST1S06PM12
ST1S06PM33
ST1S06APU
ST1S06PU12
ST1S06PU33
April 2007
Packaging
ST1S06PMR
ST1S06PUR
ST1S06APMR
ST1S06PM12R
ST1S06PM33R
ST1S06APUR
ST1S06PU12R
ST1S06PU33R
Rev. 5
Package
DFN6 (3x3 mm)
DFN6D (3x3 mm)
DFN6 (3x3 mm)
DFN6 (3x3 mm)
DFN6 (3x3 mm)
DFN6D (3x3 mm)
DFN6D (3x3 mm)
DFN6D (3x3 mm)
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