STMicroelectronics 2 A step-down switching demonstration board based on the L7980 STEVAL-ISA092V1 STEVAL-ISA092V1 Data Sheet

  

  

   

  

For further information contact your local STMicroelectronics sales office.

December 2011

Doc ID 022620 Rev 1

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2 A step-down

switching demonstration board based on the L7980

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2 A DC output current

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4.5 V to 28 V input voltage

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Output voltage: 3.3 V (adjustable from 0.6 V)

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250 kHz switching frequency, programmable 
up to 1 MHz

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Internal soft-start and enable

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Low dropout operation: 100% duty cycle

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Voltage feed-forward

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Zero load current operation

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Overcurrent and thermal protection

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RoHS compliant

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.