Part # LM2598 datasheet

Part Manufacturer: National Semiconductor

National Semiconductor

Part Description: LM2598 SIMPLE SWITCHER Power Converter 150 kHz -1A StepDown Voltage Regulator, with Features

Part Details:

Features LM2598 January 2001 SIMPLE LM2598SIMPLE SWITCHER® Power Converter 150 kHz1A Step-Down Voltage Regulator, with Features SWITCHER General Description ternal shutdown is included, featuring typically 85 µAstandby current. Self protection features include a two stage The LM2598 series of regulators are monolithic integrated current limit for the output switch and an over temperature circuits that provide all the active functions for a step-down shutdown for complete protection under fault conditions. (buck) switching regulator, capable of driving a 1A load withexcellent line and load regulation. These devices are avail- Features able in fixed output voltages of 3.3V, 5V, 12V, and an adjust-able output version. n 3.3V, 5V, 12V, and adjustable output versions Power This series of switching regulators is similar to the LM2595 n Adjustable version output voltage range, 1.2V to 37V series, with additional supervisory and performance features ±4% max over line and load conditions added. n Guaranteed 1A output current Requiring a minimum number of external components, these n Available in 7-pin TO-220 and TO-263 (surface mount) Converter regulators are simple to use and include internal frequency package compensation, improved line and load specifications, n Input voltage range up to 40V fixed-frequency oscillator, Shutdown /Soft-start, error flag n Excellent line and load regulation specifications delay and error flag output. n 150 kHz fixed frequency internal oscillator The LM2598 series operates at a switching frequency of 150 n Shutdown /Soft-start kHz thus allowing smaller sized filter components than what n Out of regulation error flag would be needed with lower frequency switching regulators. n Error output delay 150 Available in a standard 7-lead TO-220 package with several n Low power standby mode, I typically 85 µA Q different lead bend options, and a 7-lead TO-263 surface n High Efficiency mount package. Typically, for output voltages less than 12V, kHz and ambient temperatures less than 50°C, no heat sink is n Uses readily available standard inductors required. n Thermal shutdown and current limit protection A standard series of inductors (both through hole and sur- Applications

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LM2598.pdf Datasheet