BUY LM2575HVS-15 https://www.utsource.net/itm/p/1099555.html
SIMPLE SWITCHER 1A Step-Down Voltage Regulator
Description: The LM2575HVS-15 is a monolithic integrated circuit that provides all the active functions for a step-down (buck) switching regulator, capable of driving a 3A load with excellent line and load regulation.
Features:
Input voltage range: 4.5V to 40V
Output voltage range: 1.23V to 37V
Output current: 3A
Switching frequency: 150kHz
Internal soft-start
Internal over-temperature protection
Internal current limit
Low shutdown current
Applications:
Automotive applications
Battery-powered systems
Industrial and consumer applications
Portable equipment
Telecom systems
High-efficiency DC/DC converters
(For reference only)