The LM2596S-12/NOPB(购买请点击)series of regulators are monolithic integratedcircuits that provide all the active functions for a step-down(buck) switching regulator, capable of driving a 3A load withexcellent line and load regulation. These devices are availablein fixed output voltages of 3.3V, 5V, 12V, and an adjustableoutput version.
Requiring a minimum number of external components, theseregulators are simple to use and include internal frequencycompensation†, and a fixed-frequency oscillatorLM2596S-12/NOPB(购买请点击).
The LM2596 series operates at a switching frequency of150 kHz thus allowing smaller sized filter components thanwhat would be needed with lower frequency switching regulators.Available in a standard 5-lead TO-220 package withseveral different lead bend options, and a 5-lead TO-263surface mount packageLM2596S-12/NOPB(购买请点击).
A standard series of inductors are available from severaldifferent manufacturers optimized for use with the LM2596seriesLM2596S-12/NOPB(购买请点击). This feature greatly simplifies the design ofswitch-mode power supplies.Other features include a guaranteed ±4% tolerance on outputvoltage under specified input voltage and output loadconditions, and ±15% on the oscillator frequency. Externalshutdown is included, featuring typically 80 μA standby current.
Self protection features include a two stage frequencyreducing current limit for the output switch and anovertemperature shutdown for complete protection under faultconditionsLM2596S-12/NOPB(购买请点击).
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。
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