ST1S15 Datasheet, PDF (1/27 Pages) STMicroelectronics – Short-circuit and thermal protection

ST1S15
500 mA, 6 MHz synchronous step-down converter
Datasheet - production data
Features
 85% typical efficiency
 500 mA output current capability
 45 µA typical quiescent current
 PFM or PWM operation for best efficiency
over whole load range
 Ultra-fast load and line transient
 Short-circuit and thermal protection
 Small external components
 Auto or forced PWM selection with
dedicated pin
 Available in Flip Chip 6 package
Applications
 DSP and multimedia processor core supply
 Cell phones
 PDAs
Description
The ST1S15 is a high efficiency miniaturized
step-down converter able to provide 500 mA
output current from an input voltage from 2.3 V to
5.5 V. This converter is specifically designed for
applications where high efficiency and small
application area are the key factors. Thanks to
6 MHz switching frequency, the ST1S15 can use
470 nH nominal values for the inductor and
4.7 µF for the output capacitor providing, at the
same time, very good performance in terms of
load and line transients. A PFM mode can be
selected for high efficiency under light load
conditions or PWM mode for tight regulation and
best dynamic performance. Short-circuit and
thermal protection are also included.
Table 1: Device summary
Order code
Output
voltage (V)
Package
ST1S15J18R
1.82
Flip Chip 6
February 2015
DocID023280 Rev 4
This is information on a product in full production.
1/27
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