This part is a kind of semiconductor called HT7233.

Function of this product has 300mA TinyPower LDO.

Manufacturers : Holtek Semiconductor

Image and pinout :

Some of the text within the PDF file :

HT72XX Series 300mA TinyPowerTM LDO Features · Output voltage ranges: Fixed range of 1.8V, 2.5V, · Guaranteed output current: 300mA · Low quiescent current: 4mA (typ.) · Current limiting · Over-temperature shutdown · SOT23, SOT23-5, SOT89, TO92 Packages 2.7V, 3.0V, 3.3V, 5.0V type. · Highly accuracy: ±2% · Low voltage drop: 240mV (typ.), VOUT=5.0V at 300mA · Maximum Input Voltage: 8V Applications · Portable electronics · Wireless devices · Cordless phones · PC peripherals · Battery powered devices · Electronic scales General Description The HT72XX series of positive, linear regulators features low quiescent current (4mA typ.) with low dropout voltage, making them ideal for battery applications. The space-saving SOT23 package is attractive for ²Pocket² and ²Hand Held [ ... ]

HT7233 PDF Datasheet Download