LM2599SX-ADJ/NOPB Description

The LM2599SX-ADJ/NOPB regulator is a monolithic integrated circuit that provides all the active functions for a step-down (buck) switching regulator, capable of driving a 3-A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3 V, 5 V, and 12 V, and an adjustable output

version. The LM2599SX-ADJ/NOPB is a member of the LM259x family, with additional supervisory and performance features added. Requiring a minimum number of external components, these regulators are simple to use and include internal frequency compensation, improved line and load specifications, a fixed-frequency oscillator, Shutdown and Soft-start, error flag delay, and error flag output.

LM2599SX-ADJ/NOPB Features

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

Adjustable Version Output Voltage Range: 1.2 V to 37 V ±4% Maximum Over Line and Load Conditions

3-A Output Current

Available in 7-Pin TO-220 and TO-263 (SurfaceMount) Package

Input Voltage Range Up to 40 V

150-kHz Fixed-Frequency Internal Oscillator

Shutdown and Soft-Start

Out-of-Regulation Error Flag

Error Output Delay

Low Power Standby Mode, IQ, Typically 80 μA

High Efficiency

Uses Readily Available Standard Inductors

Thermal Shutdown and Current-Limit Protection

LM2599SX-ADJ/NOPB Applications

Simple High-Efficiency Step-Down (Buck) Regulator

Efficient Preregulator for Linear Regulators

On-Card Switching Regulators

Positive to Negative Converter