This part is a kind of semiconductor called MT3608.

Function of this product has High Efficiency 1.2MHz 2A Step Up Converter.

Manufacturers : AEROSEMI

Image and pinout :

Some of the text within the PDF file :

AEROSEMI FEATURES • Integrated 80mΩ Power MOSFET • 2V to 24V Input Voltage • 1.2MHz Fixed Switching Frequency • Internal 4A Switch Current Limit • Adjustable Output Voltage • Internal Compensation • Up to 28V Output Voltage • Automatic Pulse Frequency Modulation Mode at Light Loads • up to 97% Efficiency • Available in a 6-Pin SOT23-6 Package APPLICATIONS • Battery-Powered Equipment • Set-Top Boxed • LCD Bais Supply • DSL and Cable Modems and Routers • Networking cards powered from PCI or PCI express slots MT3608 High Efficiency 1.2MHz 2A Step Up Converter GENERAL DESCRIPTION The MT3608 is a constant frequency, 6-pin SOT23 current mode step-up converter intended for small, low power applications. The MT3608 switches at 1.2MHz and allows the use of tiny, low [ ... ]

MT3608 PDF Datasheet Download