BUY LM2575T-5 https://www.utsource.net/itm/p/330344.html
1.0 A, Adjustable Output Voltage, Step-Down Switching Regulator
Description: The LM2575T-5 is a monolithic integrated circuit that provides all the active functions for a step-down (buck) switching regulator. Features: Wide 4.5V to 40V input voltage range Internal 0.5Ω, 40V, N-channel power MOSFET Fixed frequency operation at 100kHz Current mode operation for excellent line and load regulation TTL shutdown capability Output voltage adjustable down to 1.2V Thermal shutdown and current limit protection Lead-free, RoHS compliant Applications: Battery-powered systems Post regulation for switching power supplies DC-DC converters High efficiency, low noise, low cost step-down regulators
(For reference only)
