LM2596 is a classic buck switching regulator chip produced by Texas Instruments, with high efficiency and low power consumption. It can stably reduce the input voltage to the set output voltage and is widely used in fields such as battery charging, LED drivers, and embedded systems，etc. LM2596 adopts external component design, and users can choose appropriate inductance and capacitance values according to their needs to meet the needs of different applications.
DescriptionThe 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.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 ±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 overtemperature shutdown for complete protection under fault conditions.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●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, I Q, typically 80 µA●High efficiency●Uses readily available standard inductors●Thermal shutdown and current-limit protectionNow a newer version of this product is available,same functionality with different pin-out to the compared device. These three specific models are LMR51430,TLVM13630 and TPSM63603.
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