General Description

The AAT3125 USB On-the-Go (OTG) charge pump is a member of AnalogicTechs Total Power Management IC™ (TPMIC™) 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.

Features

• VIN Range: 2.7V to 5.5V

• Regulated Fractional Charge Pump

• 100mA Output Current

• Reverse Load Protection

• Power Good Flag

• SRP Detection Flag

• SRP Ready Flag

• Output Short-Circuit and Thermal Protection

• Under-Voltage Protection

• Less than 1µA Consumed While Disabled

• Designed to Allow Operation with Output Capacitance as Low as 3.3µF

• 16-pin QFN44 Package

• -40°C to +85°C Temperature Range

Applications

• Cell Phones

• Hand-Held Computers

• PDAs