ST ISA099V1 User Manual

STEVAL-ISA099V1

3 A step-down switching demonstration board based on the L7986 in DFN10 package

Data brief

Features

■3 A DC output current

■From 4.5 V to 38 V range 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-ISA099V1 demonstration board is a step-down switching power supply based on the L7986 in DFN10 package.

The L7986 is a step-down 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 VIN.

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.

April 2012

Doc ID 023083 Rev 1

1/4

For further information contact your local STMicroelectronics sales office.

www.st.com

2/4

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diagram Schematic .1 Figure

1

diagram Schematic

diagram Schematic

ISA099V1-STEVAL