IC manufacturers STMicroelectronics

IC manufacturers (95)

STMicroelectronics ST1S31

3 A DC step-down switching regulator

Overview

TopologyBuck Converter
Input voltage5 V
Switching frequency1200-1900 kHz
Output 13.3 V
IC revision4

Description

The ST1S31 device is an internally compensated 1.5 MHz fixed-frequency PWM synchronous stepdown regulator. The ST1S31 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 ST1S31 integrates a 60 mΩ high-side switch and a 45 mΩ 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 device is available in 3 mm x 3 mm, 8 lead VFDFPN and SO8 packages.

Features

  • 3 A DC output current
  • 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 capacitor
  • Power Good (POR)
  • Cycle-by-cycle current limiting
  • Current foldback short-circuit protection
  • VFDFPN 3 x 3 - 8L, SO8 packages

Typical applications

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