Part # LM2595 datasheet

Part Manufacturer: National Semiconductor

National Semiconductor

Part Description: LM2595 SIMPLE SWITCHER® Power Converter 150 kHz 1A Step-Down Voltage Regulator


Part Details:

LM2595 May 1999 SIMPLE LM2595SIMPLE SWITCHER® Power Converter 150 kHz1A Step-Down Voltage Regulator SWITCHER General Description Features The LM2595 series of regulators are monolithic integrated n 3.3V, 5V, 12V, and adjustable output versions circuits that provide all the active functions for a step-down n Adjustable version output voltage range, 1.2V to 37V (buck) switching regulator, capable of driving a 1A load with ±4% max over line and load conditions excellent line and load regulation. These devices are avail- n Available in TO-220 and TO-263 (surface mount) able in fixed output voltages of 3.3V, 5V, 12V, and an adjust- packages able output version. Power n Guaranteed 1A output load current Requiring a minimum number of external components, these n Input voltage range up to 40V regulators are simple to use and include internal frequency n Requires only 4 external components compensation, and a fixed-frequency oscillator. n Excellent line and load regulation specifications The LM2595 series operates at a switching frequency of n 150 kHz fixed frequency internal oscillator Converter 150 kHz thus allowing smaller sized filter components than n TTL shutdown capability what would be needed with lower frequency switching regu- n Low power standby mode, I typically 85 µA lators. Available in a standard 5-lead TO-220 package with Q several different lead bend options, and a 5-lead TO-263 n High efficiency surface mount package. Typically, for output voltages less n Uses readily available standard inductors than 12V, and ambient temperatures less than 50°C, no heat n Thermal shutdown and current limit protection sink is required. 150 A standard series of inductors are available from several dif- Applications ferent manufacturers optimized for use with the LM2595 se- n Simple high-efficiency step-down (buck) regulator ries. This feature greatly simplifies the design


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LM2595.pdf Datasheet