ADM1072

= Dual, USB 2.0 Full/Standby Power Controller with Supply Steering Preliminary Technical Data ADM1072 GENERAL DESCRIPTION FEATURES 500mA Load Current (100mA in Standby Mode) 135m⍀ On Resistance Switchable Current Limit 50µA Typical Quiescent Current 10nA Typical Shutdown Current 40nA Typical Switch Off Leakage Short-Circuit Protection Thermal Shutdown FLT Outputs Small, 16-Pin QSOP Package APPLICATIONS Desktop Computers Palmtop Computers Notebook Computers Hand-Held Instruments Universal Serial Bus (USB) 1A MAIN FET The ADM1072 is a logic controlled, dual P-channel switch with low on resistance and a built-in current limiter, capable of sourcing up to 1A from supply voltages between 2.7V and 5.5V. In addition to logic inputs that switch each channel on and off, the device has a standby input that switches the output current limit, making it ideal for use with USB peripherals. In normal operating mode and Standby mode the output current is typically limited to 500mA and 100mA respectively, as outlined by the USB2.0 Specification. This allows the system power supply to be protected against short-circuits and surge currents in peripheral USB devices powered via the ADM1072. Over-current and over-temperature conditions are signalled by a fault output (FLT) for each channel. The ADM1072 also offers low quiescent current of typically 50µA and shutdown current of typically 10nA. MAIN_IN (2.7V TO 5.5V) 22µF 2 3 14 15 1A MIRROR FET STBY_IN (2.7V TO 5.5V) 0.2A MAIN FET 5 12 ...