Acquired by Texas Instruments on September 23rd, 2011.
●General Description
●The LM2598 series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving a 1A 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.
●This series of switching regulators is similar to the LM2595 series, with additional supervisory and performance features added.
●Requiring a minimum number of external components, these regulators are simple to use and include internal frequency compensation†, improved line and load specifications, fixed-frequency oscillator, Shutdown /Soft-start, error flag delay and error flag output.
●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
●■ Guaranteed 1A output current
●■ Available in 7-pin TO-220 and TO-263 (surface mount) package
●■ Input voltage range up to 40V
●■ Excellent line and load regulation specifications
●■ 150 kHz fixed frequency internal oscillator
●■ Shutdown /Soft-start
●■ Out of regulation error flag
●■ Error output delay
●■ Low power standby mode, IQ typically 85 µA
●■ High Efficiency
●■ Uses readily available standard inductors
●■ Thermal shutdown and current limit protection
●Applications
●■ Simple high-efficiency step-down (buck) regulator
●■ Efficient pre-regulator for linear regulators
●■ On-card switching regulators
●■ Positive to Negative converter
