STEVAL-ISA099V1

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 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. April 2012 Doc ID 023083 Rev 1 1/4 For further information contact your local STMicroelectronics sales office. www.st.com 4 2 2 2 2 Schematic diagram STEVAL-ISA099V1 1 Schematic diagram Figure 1. Schematic diagram 6).6) . 40 40 40 40 U U N N 2 2 K K 6 6 . &37 2 2 K K , , . P P N N /54 /54 39. %. /-0 5 5 2 2 . - . - 40 40 39. 39. 2 2 K K 3403 , 3403 , , , U( U( U U 2 2 K K 2 2 K K N N 2 2 40 40 40 40 /546/546 - V 2/4 Doc ID 023083 Rev 1