the uc1842/3/4/5 family of control devices provides the necessary features to implement off-line or dc-to-dc fixed...

Single ended 500KHz current mode PWM controller with 16V/10V UVLO 50% duty cycle, -40C to 85C 14-SOIC -40 to 85
1A SWITCHING CONTROLLER, 500kHz SWITCHING FREQ-MAX, PDSO8, GREEN, PLASTIC, MS-012AA, SOIC-8

1A SWITCHING CONTROLLER, 500kHz SWITCHING FREQ-MAX, PDSO14, GREEN, PLASTIC, MS-012AB, SOIC-14
1 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDIP8, GREEN, PLASTIC, DIP-8
1A SWITCHING CONTROLLER, 500kHz SWITCHING FREQ-MAX, PDSO14, GREEN, PLASTIC, MS-012AB, SOIC-14