ST ST1S40IDR

Step-DownБак4V18V3A

Overview

The ST1S40IDR device is an internally compensated 850 kHz fixed-frequency PWM synchronous step-down regulator. The ST1S40IDR operates from 4.0 V to 18 V input, while it regulates an output voltage as low as 0.8 V and up to VIN.

The ST1S40IDR integrates a 95 mΩ high side switch and 69 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 ST1S40IDR is available in HSOP-8, VFQFPN 4 mm x 4 mm - 8 lead, and standard SO8 package.

Features

• 3 A DC output current

• 4.0 V to 18 V input voltage

• Output voltage adjustable from 0.8 V

• 850 kHz switching frequency

• Internal soft-start

• Integrated 95 m? and 69 m? Power MOSFETs

• All ceramic capacitor

• Enable

• Cycle-by-cycle current limiting

• Current fold back short-circuit protection

• Available in HSOP-8, VFQFPN4x4-8L, and SO8 packages

Applications

• P/ASIC/DSP/FPGA core and I/O supplies

• Point of load for: STB, TVs, DVD

• Optical storage, hard disk drive, printers, audio/graphic cards