Texas Instruments
IC REG BUCK 5V 1A 16-DIP. Switching Voltage Regulators 1A SD VTG Reg
STMicroelectronics
IC REG BUCK ADJ 1.5A 16DIP. Switching Voltage Regulators 5.0 to 40V Step-Down
Monolithic Power Systems Inc.
IC REG BUCK ADJ 1A. Switching Voltage Regulators 1A/50V, 4MHz HF Step DownSwitch Regulator