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STEVAL-ISA083V1 Datasheet, PDF (1/4 Pages) STMicroelectronics – Short-circuit protected | |||
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STEVAL-ISA083V1
4 A peak 800 kHz fixed-frequency PWM synchronous step-down
demonstration board with enable on/off based on the ST1S40IPUR
Data brief
Features
â Input voltage Vin : 4 V to 18 V
â Output voltage Vout : 3.3 V
â Maximum output current: 4 A
â Switching frequency: 800 kHz
â Short-circuit protected
â RoHS compliant
Description
The STEVAL-ISA083V1, based on the
ST1S40IPUR, is an internally compensated 800
kHz fixed-frequency PWM synchronous step-
down converter demonstration board.
The ST1S40 operates from 4.0 V to 18.0 V input,
while it regulates an output voltage as low as 0.8
V and up to VIN (100% duty cycle).
The ST1S40 integrates a 95 m⦠high-side switch
and a 69 m⦠synchronous rectifier allowing very
high efficiency with very low output voltage.
The peak current mode control with internal
compensation delivers a very compact solution
with a minimum component count.
The ST1S40 is protected through cycle-by-cycle
current limiting in case of overload and is also
protected by a current foldback function with
frequency reduction in case of short-circuit.
The device is available with an enable on/off
function.
STEVAL-ISA083V1
September 2011
Doc ID 022278 Rev 1
For further information contact your local STMicroelectronics sales office.
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www.st.com
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