SIMPLE SWITCHER Power Converter 150 KHz 1A Step-Down Voltage Regulator

The LM2595 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.
Requiring a minimum number of external components, these Regulators are simple to use and include internal frequency compensation?, and a fixed-frequency Oscillator
The LM2595 series operates at a switching frequency of 150 kHz thus allowing smaller sized Filter components than what would be needed with lower frequency Switching Regulators Available in a standard 5-lead TO-220 package with several different lead bend options, and a 5-lead TO-263 surface mount package. Typically, for output voltages less than 12V, and ambient temperatures less than 50?C, no heat sink is required.
A standard series of inductors are available from several different manufacturers optimized for use with the LM2595 series. This feature greatly simplifies the design of switch-mode power supplies.
Other features include a guaranteed ?4% tolerance on output voltage under specified input voltage and output load conditions, and ?15% on the Oscillator frequency. External shutdown is included, featuring typically 85 ?A stand-by current. Self protection features include a two stage frequency reducing current limit for the output Switch and an over temperature shutdown for complete protection under fault conditions.
By National Semiconductor Corporation