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STMicroelectronics ST1S31 Step-Down Switching Regulator

STMicroelectronics ST1S31 Step-Down Switching Regulator is an internally compensated 1.5MHz fixed-frequency PWM synchronous step-down regulator. The ST1S31 operates from 2.8V to 5.5V input, while it regulates an output voltage as low as 0.8V and up to VIN.

This device integrates a 60mΩ high-side switch and 45mΩ synchronous rectifier allowing very high efficiency with very low output voltages. The peak current mode control with internal compensation delivers a very compact solution with a minimum component count. The ST1S31 is available in 3mm x 3mm, 8 lead VFDFPN, and SO-8 packages.

Features

  • 3A DC output current
  • 2.8V to 5.5V input voltage
  • Output voltage adjustable from 0.8V
  • 1.5MHz switching frequency
  • Internal soft-start and enable
  • Integrated 60mΩ and 45mΩ Power MOSFETs
  • All ceramic capacitor
  • Power Good (POR)
  • Cycle-by-cycle current limiting
  • Current foldback short-circuit protection
  • VFDFPN3x3-8L, SO8 packages

Applications

  • μP/ASIC/DSP/FPGA core and I/O supplies
  • Point of load for STB, TVs, DVDs
  • Optical storage, hard disk drive, printers, audio/graphic cards

Application Circuit

Application Circuit Diagram - STMicroelectronics ST1S31 Step-Down Switching Regulator
发布日期: 2013-07-18 | 更新日期: 2022-03-11