STEVAL-ISA092V1 STMicroelectronics

STEVAL-ISA092V1 2 A step-down switching demonstration board based on the L7980 Data brief 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 STEVAL-ISA092V1 RoHS compliant Description 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