IC 5.5 A SWITCHING REGULATOR, 115 kHz SWITCHING FREQ-MAX, MBFM4, METAL CAN, TO-3, 4 PIN, Switching Regulator or Controller
LT1171 - 100kHz, 5A, 2.5A and 1.25A High Efficiency Switching Regulators; Package: TO-220; Pins: 5; Temperature Range: -40°C to 85°C
LT1172 - 100kHz, 5A, 2.5A and 1.25A High Efficiency Switching Regulators; Package: PDIP; Pins: 8; Temperature Range: -40°C to 85°C

Switching Regulator, Voltage-mode, 1.5A, 23kHz Switching Freq-Max, BIPolar, PDSO8

Switching Regulator, Current-mode, 3.5A, 115kHz Switching Freq-Max, BIPolar, PDIP8