LM2596T-5.0/NOPB Step-Down Switching Regulator 1-Channel 3A 5-Pin TO-220

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 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 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.

• 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.