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 adjustable output version.

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 UA

• 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