LM2670T-5.0

Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LM2670 SNVS036K – APRIL 2000 – REVISED JUNE 2016 LM2670 SIMPLE SWITCHER® High Efficiency 3-A Step-Down Voltage Regulator With Sync 1 Features 1 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 Full Line and Load Conditions Wide Input Voltage Range: 8 V to 40 V External Sync Clock Capability (280 kHz to 400 kHz) 260-kHz Fixed Frequency Internal Oscillator –40 to 125°C Operating Junction Temperature Range 2 Applications Simple-to-Design, High Efficiency (>90%) StepDown Switching Regulators Efficient System Preregulator for Linear Voltage Regulators Battery Chargers Communications and Radio Equipment Regulator With Synchronized Clock Frequency 3 Description The LM2670 series of regulators are monolithic integrated circuits which provide 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 ONresistance DMOS power switch. The series consists of fixed output voltages of 3.3-V, 5-V, and 12-V output version. The SIMPLE SWITCHER® concept provides for a complete design using a minimum numbe...