STEVAL-ISA094V1 Datasheet, PDF (1/4 Pages) STMicroelectronics – 3 A step-down switching power supply demonstration board based on the L7981 (HSOP8)

STEVAL-ISA094V1
3 A step-down switching power supply demonstration board
based on the L7981 (HSOP8)
Data brief
Features
■ 3 A DC output current
■ 4.5 V to 28 V input voltage
■ Output voltage adjustable from 0.6 V
■ 250 kHz switching frequency, programmable
up to 1 MHz
■ Internal soft-start and enable
■ Low dropout operation: 100% duty cycle
■ Voltage feed-forward
■ Zero load current operation
■ Overcurrent and thermal protection
■ RoHS compliant
Description
The STEVAL-ISA094V1 is a step-down switching
power supply based on STMicroelectronics’
L7981 switching regulator in an HSOP8 package.
The L7981 features an embedded power
MOSFET and is capable of delivering up to 3 A of
current to the load, depending on the application
conditions.
The input voltage can range from 4.5 V to 28 V,
while the output voltage can be set from 0.6 V to
V_IN.
Requiring a minimum number of external
components, the device includes an internal 250
kHz switching frequency oscillator that can be
externally adjusted up to 1 MHz.
STEVAL-ISA094V1
December 2011
Doc ID 022621 Rev 1
For further information contact your local STMicroelectronics sales office.
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www.st.com
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