The LM258x series of regulators are monolithic integrated circuits specifically designed for flyback, step-up (boost), SEPIC, and forward converter applications. The device is available in 4 different output voltage versions: 3.3V, 5.0V, 12V, and adjustable. Requiring a minimum number of external components, these regulators are simple to use. Included in the datasheet are typical circuits of boost and flyback regulators.
Features
NPN output switches support up to 5.0A and can stand off 65V
Wide input voltage range: 4V to 40V
Current-mode operation for improved transient response, line regulation, and current limit
100 - 200 kHz switching frequencies supported
Internal soft-start function reduces in-rush current during start-up
Output transistor protected by current limit, under voltage lockout, and thermal shutdown
System Output Voltage Tolerance of ±4% max over line and load conditions
