Texas Instruments LMR14203XMKE/NOPB DC-DC, Step Down Buck Controller 1.5 MHz 6-Pin, SOT-23

Input Voltage up to 42V (LMRx42xx), 20V (LMRx20xx), and 5.5V (LMRx05xx)
Output Current up to 2A (LMRxxx20), 1.5A (LMRxxx15), 1A (LMRxxx10), etc.
Adjustable output voltage from 0.6V
1MHz or greater switching frequency of 1.6MHz (LMR.....X) and 3MHz (LMR.....Y)
Low Shutdown Quiescent Current
Internal Soft-start
Thermal Shutdown

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SIMPLE SWITCHER® Regulators, Texas Instruments

Use for wide voltage inputs designs up to 75V, and a balance between ease of use and flexibility.