LM2596
1) TO-220-5, TO-263-5
2) Power Converter 150 kHz
3) 3A Step-Down Voltage Regulator
4) output voltage---3.3V 5.0V,12V

LM2596

TO-220-5 TO-263-5 

General 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 3A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3V, 5V, 12V, and an adjustableoutput 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 would be needed with lower frequency switching regulators. Available in a standard 5-lead TO-220 package with several different lead bend options, and a 5-lead TO-263 surface mount package.

  A standard series of inductors are available from several different manufacturers optimized for use with the LM2596 series. This feature greatly simplifies the design of

switch-mode power supplies.

  Other features include a guaranteed ±4% tolerance on output voltage under specified input voltage and output load conditions, and ±15% on the oscillator frequency. External shutdown is included, featuring typically 80 μA standby current. Self protection features include a two stage frequency reducing current limit for the output switch and an over temperature shutdown for complete protection under fault conditions.

Features

-3.3V, 5V, 12V, and adjustable output versions

-Adjustable version output voltage range, 1.2V to 37V ±4% max over line and load conditions

-Available in TO-220 and TO-263 packages

-Guaranteed 3A output load current

-Input voltage range up to 40V

-Requires only 4 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

Applications

-Simple high-efficiency step-down (buck) regulator

-On-card switching regulators

-Positive to negative converter