LM2676S-ADJ Description

The LM2676S-ADJ regulator is a monolithic integrated circuit that provides all of the active functions for a step-down (buck) switching regulator capable of driving up to 3-A loads with excellent line and load regulation characteristics. High efficiency (>90%) is obtained through the use of a low-resistance DMOS power switch. The LM2676S-ADJ consists of fixed output voltages of 3.3-V, 5-V, and 12-V and an adjustable output version.

LM2676S-ADJ Features

Efficiency up to 94%

Simple and easy to design with (using off-the-shelf external components)

150-mΩ DMOS output switch

3.3-V, 5-V, 12-V Fixed output, and adjustable (1.2 V to 37 V) versions

50-µA Standby current when switched OFF

±2% Maximum output tolerance over the full line and load conditions

Wide input voltage range: 8 V to 40 V

260-kHz Fixed frequency internal oscillator

–40 to 125°C Operating junction temperature range

LM2676S-ADJ Applications

Communication module

Electricity meter

Calling button operating panel

Motor drives