STEVAL-ISA108V1 Datasheet, PDF (1/4 Pages) STMicroelectronics – 850 kHz switching frequency

STEVAL-ISA108V1
4 A, 850 kHz fixed-frequency PWM synchronous step-down
demostration board based on the ST1S41 in a VFQFPN package
Data brief
Features
■ 4 to 18 V input voltage
■ Output voltage adjustable from 0.8 V
■ 850 kHz switching frequency
■ Internal soft-start
■ Integrated 95 mΩ and 69 mΩ power MOSFETs
■ All ceramic capacitor
■ Enable function
■ Cycle-by-cycle current limiting
■ Current fold-back short-circuit protection
■ RoHS compliant
Description
Based on the ST1S41 step-down switching
regulator, the STEVAL-ISA108V1 demonstration
board is an internally-compensated 850 kHz
fixed-frequency PWM synchronous step-down
converter.
The ST1S41 operates from 4.0 V to 18 V input,
while it regulates an output voltage as low as 0.8
V and up to V_IN (100% duty cycle).
The ST1S41 integrates a 95 mΩ high side switch
and 69 mΩ low side synchronous rectifier,
resulting in very high efficiency with very low
output voltages.
The peak current mode control with internal
compensation offers a compact solution with a
minimum component count.
February 2013
Doc ID 024148 Rev 1
For further information contact your local STMicroelectronics sales office.
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