Part # LM2594 datasheet

Part Manufacturer: National Semiconductor

National Semiconductor

Part Description: LM2594 LM2594HV SIMPLE SWITCHER Power Converter 150 kHz 0.5A Step-Down Voltage Regulator


Part Details:

Regulator LM2594/LM2594HV December 1999 LM2594/LM2594HVSIMPLE SWITCHER® Power Converter 150 kHz 0.5AStep-Down Voltage Regulator General Description The LM2594HV is for applications requiring an input voltage SIMPLE up to 60V. The LM2594/LM2594HV series of regulators are monolithicintegrated circuits that provide all the active functions for a Features step-down (buck) switching regulator, capable of driving a0.5A load with excellent line and load regulation. These de- n 3.3V, 5V, 12V, and adjustable output versions vices are available in fixed output voltages of 3.3V, 5V, 12V, n Adjustable version output voltage range, 1.2V to 37V SWITCHER and an adjustable output version, and are packaged in a (57V for the HV version)±4% max over line and load 8-lead DIP and a 8-lead surface mount package. conditions Requiring a minimum number of external components, these n Available in 8-pin surface mount and DIP-8 package regulators are simple to use and feature internal frequency n Guaranteed 0.5A output current compensation, a fixed-frequency oscillator, and improved n Input voltage range up to 60V line and load regulation specifications. n Requires only 4 external components The LM2594/LM2594HV series operates at a switching fre- n 150 kHz fixed frequency internal oscillator quency of 150 kHz thus allowing smaller sized filter compo- n TTL Shutdown capability Power nents than what would be needed with lower frequency n Low power standby mode, I typically 85 µA Q switching regulators. Because of its high efficiency, the cop- n High Efficiency per traces on the printed circuit board are normally the onlyheat sinking needed. n Uses readily available standard inductors n Thermal shutdown and current limit protection A standard series of inductors (both through hole and sur- Converter face mount types) are available from several different manu- Applications facturers optimized for use with the LM2594/LM2594HV se-ries. This feature greatly simplifies the design of n Simple high-efficiency step-down (buck) regulator switch-mode power supplies.


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LM2594.pdf Datasheet