Part # LM2597 datasheet

Part Manufacturer: National Semiconductor

National Semiconductor

Part Description: LM2597 LM2597HV SIMPLE SWITCHER Power Converter 150 kHz 0.5A Step-Down Voltage Regulator, with Features


Part Details:

Regulator LM2597/LM2597HV December 2000 LM2597/LM2597HV ,with SIMPLE SWITCHER® Power Converter 150 kHz 0.5AStep-Down Voltage Regulator, with Features Features General Description The LM2597HV is for use in applications requiring and input SIMPLE voltage up to 60V. The LM2597/LM2597HV 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 n 3.3V, 5V, 12V, and adjustable output versions devices are available in fixed output voltages of 3.3V, 5V, n Adjustable version output voltage range, 1.2V to 37V SWITCHER 12V, and an adjustable output version, and are packaged in (57V for HV version)±4% max over line and load an 8-lead DIP and an 8-lead surface mount package. conditions This series of switching regulators is similar to the LM2594 n Guaranteed 0.5A output current series, with additional supervisory and performance features n Available in 8-pin surface mount and DIP-8 package added. n Input voltage range up to 60V Requiring a minimum number of external components, these n 150 kHz fixed frequency internal oscillator regulators are simple to use and include internal frequency n Shutdown /Soft-start compensation, improved line and load specifications, n Out of regulation error flag Power fixed-frequency oscillator, Shutdown /Soft-start, error flag n Error output delay delay and error flag output. n Bias Supply Pin (V ) for internal circuitry improves BS The LM2597/LM2597HV series operates at a switching fre- efficiency at high input voltages quency of 150 kHz thus allowing smaller sized filter compo- n Low power standby mode, I typically 85 µA Q nents than what would be needed with lower frequency Converter n High Efficiency switching regulators. Because of its high efficiency, the cop-per traces on the printed circuit board are normally the only n Uses readily available standard inductors heat sinking needed. n Thermal shutdown and current limit protection A standard series of inductors (both through hole and sur-


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LM2597.pdf Datasheet