Voltage LDO Regulator, Integrated-circuit linear regulator, regulator circuit

 MIC2954 Series 5 V Fixed Output 250 mA SMT LDO Voltage Regulator - SOT-223

https://www.futureelectronics.com/p/semiconductors--analog--regulators-reference--linear-regulators/mic2954-03ws-tr-microchip-7061616