STEVAL-ISA160V1 STMicroelectronics

S T E VA L - I S A 1 6 0 V 1 3 A / 2.3 MHz step-down synchronous switching regulator based on the AST1S31HF in a DFN 3x3 package Data brief Description The STEVAL-ISA160V1 evaluation board is based on the AST1S31HF internally compensated 2.3 MHz fixed-frequency PWM synchronous step-down regulator. The device operates on a 2.8 V to 4.0 V input voltage and provides a regulated output voltage from as low as 0.8 V up to Vin. The peak current mode control with internal compensation delivers a very compact solution with a minimum component count. All the components on the evaluation board are automotive grade. Features AECQ100 qualification 3 A DC output current 2.8 V to 4 V input voltage Output voltage adjustable from 0.8 V 2.3 MHz switching frequency Internal soft-start and enable Integrated 70 m and 55 m power MOSFETs All ceramic capacitor Power good (POR) Cycle by cycle current limiting Current fold back short circuit protection VFDFPN 3x3 - 8L package RoHS compliant February 2016 DocID029028 Rev 1 1/4 www.st.com For further information contact your local STMicroelectronics sales office Schematic diagram STEVAL-ISA160V1 1 Schematic diagram Figure 1: STEVAL-ISA160V1 circuit schematic GSPG2202161045SG VIN U1 AST1S31HF 1 8 L1 VIN A PGND C3 2 7 EN SW VOUT 1uF 0.91uH 3 6 FB VIN SW 4 5 AGND PGOOD C1 C2 47uF 22uF R3 10K R1 100K R2 200K 2/4 DocID029028 Rev 1 9 ePAD