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3 A / 2.3 MHz step-down synchronous switching regulator based on the AST1S31HF in a DFN 3x3 package

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Parameter NameParameter Value
Target ApplicationDC-DC Topologies
Core ProductAST1S31HF
Input Voltage Min Volt2.8
Input Voltage Max Volt4.0
Packing TypeNot Applicable
RoHs compliantEcopack2
Package NameCARD

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.

Key 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 mΩ and 55 mΩ 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