The AAT3125 USB On-the-Go (OTG) charge pump is a member of AnalogicTech's Total Power Management ICTM (TPMICTM) product family. The device integrates a high efficiency 1.5X fractional 100mA regulated charge pump for supplying VBUS with the additional functions required for OTG devices (formerly known as dual role devices). Four voltage detectors monitor VBUS, and a current source dedicated for VBUS pulsing is provided for compliance with Session Request Protocol (SRP) as defined by the USB OTG Supplement.