STEVAL-ISA069V1 STMicroelectronics

STEVAL-ISA069V1 3 A / 1.5 MHz step-down synchronous switching regulator based on the ST1S31 in DFN 3x3 package Data brief Features 4 A peak output current From 2.8 V to 5.5 V input voltage Output voltage adjustable from 0.8 V 1.5 MHz switching frequency Internal soft-start and enable Integrated 60 m and 45 m power MOSFETs All ceramic capacitors Power Good (POR) Cycle-by-cycle current limiting Current foldback short-circuit protection RoHS compliant Description The STEVAL-ISA069V1 demonstration board is based on the ST1S31, which is an internally compensated 1.5 MHz fixed-frequency PWM synchronous step-down regulator. This device operates from 2.8 V to 5.5 V input, while it regulates an output voltage as low as 0.8 V and up to Vin. The peak current mode control with internal compensation delivers a very compact solution with a minimum component count. April 2012 Doc ID 022882 Rev 1 1/4 For further information contact your local STMicroelectronics sales office. www.st.com 4Schematic diagram Document header RPN(s) 1 Schematic diagram Figure 1. Schematic diagram , ( . 54 7 .36) . 6) 2 34 3 %. n 0 O T U IN SW 2 . & & 0 Y 2/4 Doc ID 022882 Rev 1 6& & 2 IN A 37 6/ 6)