ST ISA097V1 User Manual

STEVAL-ISA097V1

2 A step-down switching demonstration board based on the L7985 in DFN10 package

Data brief

Features

■2 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-ISA097V1 demonstration board is a step-down switching power supply based on the L7985 in DFN10 package.

The L7985 is a step-down regulator with a 2.5 A (minimum) current limited embedded Power MOSFET, so it is able to deliver up to 2 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 023076 Rev 1

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For further information contact your local STMicroelectronics sales office.

www.st.com

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diagram Schematic .1 Figure

1

diagram Schematic

diagram Schematic

ISA097V1-STEVAL