BUY LM2574N https://www.utsource.net/itm/p/35295.html
0.5 A, Adjustable Output Voltage, Step-Down Switching Regulator
Description: The LM2574N is a monolithic integrated circuit in an 8-pin dual-in-line package. It is a step-down DC-DC converter with a wide input voltage range of 4.5V to 40V.
Features:
Low quiescent current
Internal soft-start
Internal current limit
Internal thermal shutdown
Output voltage adjustable
High efficiency
Low ripple
Applications:
Battery-powered systems
Automotive applications
Industrial systems
Telecom systems
Portable equipment
(For reference only)