LM2675N-5.0 Description

The LM2675 series of regulators are monolithic integrated DC-DC converter circuits built with a LMDMOS process. These regulators provide all the active functions for a step-down (buck) switching regulator, capable of driving a 1-A load current with excellent line and load regulation. These devices are available in fixed output voltages of 3.3 V, 5 V, 12 V, and an adjustable output version. Requiring a minimum number of external components, these regulators are simple to use and include patented internal frequency compensation and a fixed frequency oscillator.

LM2675N-5.0 Features

Efficiency up to 96%

Available in 8-Pin SOIC, PDIP, and 16-Pin WSON Package

Requires only 5 External Components

3.3-V, 5-V, 12-V, and Adjustable Output Versions

Adjustable Version Output Voltage Range: 1.21 V to 37 V

±1.5% Maximum Output Voltage Tolerance Over Line and Load Conditions

Ensured 1-A Output Load Current

Wide Input Voltage Range: 8 V to 40 V

260-kHz Fixed Frequency Internal Oscillator

TTL Shutdown Capability, Low-Power Standby Mode

Thermal Shutdown and Current Limit Protection

LM2675N-5.0 Applications

Simple High Efficiency (>90%) Step-Down (Buck) Regulator

Efficient Preregulator for Linear Regulators

Positive-to-Negative Converter