May 2016

DocID029293 Rev 1

1/5

For further information contact your local STMicroelectronics sales

office

www.st.com

STEVAL-ISA190V1

38 V, 1.5 A synchronous step-down switching regulator

evaluation board based on A6986F

Data brief

Features

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AECQ100 qualification

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1.5 A DC output current

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4 V to 38 V operating input voltage

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Low consumption mode or low noise mode

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Embedded output voltage supervisor

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Synchronization

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Adjustable soft-start time

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Internal current limiting

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Overvoltage protection

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Output voltage sequencing

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Peak current mode architecture

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Thermal shutdown

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RoHS compliant

Description

The STEVAL-ISA190V1 is a product evaluation

board based on ST's synchronous step-down

switching regulator A6986F.

The device is capable of delivering up to 1.5 A

and its 100% duty cycle capability to withstand

the cold crank event along with its wide input

operating voltage range make A6986F the ideal

choice for battery powered automotive systems.

Synchronous rectification improves efficiency at

full load as well as application compactness,

while high-frequency switching (programmable

up to 2 MHz) lowers power passive costs and

size while remaining outside of the AM band.

The device can operate in low consumption

mode (LCM) with quiescent current as low as 30

assuring high efficiency at light loads, as required

in typical car body applications that remain active

while the car is parked. A low noise mode (LNM)

can alternatively be selected to meet the forced

PWM mode requirement under all loading

conditions for infotainment applications.

The default evaluation board settings are 6 V

output voltage configured in LCM, 500 kHz

the switchover feature disabled. These

configurations can easily be changed by the user

to evaluate different application scenarios.