LM2596SX-12 12V 3A Step-Down Converter with Wide 4.5V-40V Input 80% Efficiency Adjustable Output, Thermal Protection Low Ripple and Compact TO-263 Package for Reliable Power Regulation

Features

• New product available:– LMR51430 4.5 to 36-V, 3-A, 500-kHz and 1.1 MHz synchronous converter

• For faster time to market:– TLVM13630 3 to 36-V, 3-A, 200-kHz to 2.2-MHz power module

• 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

• Available in TO-220 and TO-263 packages

• 3-A output load current

• Input voltage range up to 40 V

• Requires only four external components

• Excellent line and load regulation specifications

• 150-kHz fixed-frequency internal oscillator

• TTL shutdown capability

• Low power standby mode, IQ, typically 80 μA

• High efficiency

• Uses readily available standard inductors

• Thermal shutdown and current-limit protection

• Create a custom design using the LM2596 with the WEBENCH® Power Designer

Applications

• Appliances

• Grid infrastructure

• EPOS

• Home theater

Description

The LM2596 series of regulators are monolithic integrated circuits that provide 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, 12 V, and an adjustable output version.

Requiring a minimum number of external components, these regulators are simple to use and include internal frequency compensation, and a fixed frequency oscillator.

The LM2596 series operates at a switching frequency of 150 kHz, thus allowing smaller sized filter components than what can be required with lower frequency switching regulators. Available in a standard 5-pin TO-220 package with several different lead bend options, and a 5-pin TO-263 surface mount package.

INFORMATION

Drawing

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