ST ISA092V1 User Manual

switching demonstration board based on the L7980

STEVAL-ISA092V1

Features

■ 2 A DC output current

■ 4.5 V to 28 V input voltage

■ Output voltage: 3.3 V (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

STEVAL-ISA092V1

2 A step-down

Data brief

The STEVAL-ISA092V1 is a step-down switching
power supply based on the L7980 in a QFN
package.

The L7980 is a step-down switching regulator with
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 28 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.

December 2011 Doc ID 022620 Rev 1 1/4

For further information contact your local STMicroelectronics sales office.

www.st.com

4

Circuit schematic STEVAL-ISA092V1

1 Circuit schematic

Figure 1. Circuit schematic

2/4 Doc ID 022620 Rev 1