This part is a kind of semiconductor called Si9183DT-AD-T1.

Function of this product has High-Performance/ Size Saving 150-mA CMOS LDO Regulator.

Manufacturers : Vishay Siliconix

Image and pinout :

Some of the text within the PDF file :

Si9183 Vishay Siliconix High-Performance, Size Saving 150-mA CMOS LDO Regulator FEATURES D D D D D D D D D Low 135-mV Dropout at 150-mA Load Guaranteed 150-mA Output Current 300-mA Peak Output Current Capability Uses Low ESR Ceramic Output Capacitor Fast Load And Line Transient Response Low Output Noise 1-mA Maximum Shutdown Current Built-in Short Circuit And Thermal Protection Fixed 1.5-V, 1.8-V, 2.0-V, 2.5-V, 2.7-V, 2.8-V, 2.85-V, 3.0-V, 3.3-V, 3.6-V, 5.0-V or Adjustable Output Voltage Options (Version B) D Thin SOT-23 5-Pin Package APPLICATIONS D D D D D D Battery Powered Portable Systems Cellular Phones PDAs, Palmtops Pagers Post Regulators for Multi-Output Converters Notebook Computers DESCRIPTION The Si9183 is a high performance yet size saving 150-mA CMOS LDO (low dropout) volta [ ... ]

Si9183DT-AD-T1 PDF Datasheet Download