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April 2012 Doc ID 023084 Rev 1 1/4
4
STEVAL-ISA100V1
3 A step-down switching demonstration board based on the L7986A
in HSOP8 package
Data brief
Features
■ 3 A DC output current
■ 4.5 V to 38 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-ISA100V1 demonstration board is a
step-down switching power supply based on the
L7986A in HSOP8 package.
The L7986A is a step-down switching regulator
with a 3.7 A (minimum) current limited embedded
power MOSFET, so it is able to deliver up to 3 A
current to the load depending on the application
conditions.
The input voltage can range from 4.5 V to 38 V,
while the output voltage can be set starting from
0.6 V to V
IN
.
Requiring a minimum set of external components,
the device includes an internal 250 kHz switching
frequency oscillator that can be externally
adjusted up to 1 MHz.
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