DC/DC Converter IC 0.6. . .5.5 V TSOT-23-6, LTC3560IS6#PBF, Linear Technology
IC 2.1 A SWITCHING REGULATOR, 2700 kHz SWITCHING FREQ-MAX, PDSO6, 1 MM HEIGHT, PLASTIC, MO-193, TSOT-23, Switching Regulator or Controller

Sync Step Down DC-DC Conv, 0.8A, 2.5-5.5V In, 0.6-5.5V Out, 6-Pin TSOT-23

LTC3561 - 1A, 4MHz, Synchronous Step-Down DC/DC Converter; Package: DFN; Pins: 8; Temperature Range: -40°C to 85°C

LTC3569 - Triple Buck Regulator with 1.2A and Two 600mA Outputs and Individual Programmable References