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AAT4670 Datasheet(PDF) 1 Page - Advanced Analogic Technologies |
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AAT4670 Datasheet(HTML) 1 Page - Advanced Analogic Technologies |
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1 / 12 page  SmartSwitch™ AAT4670 Dual-Input, Dual-Output Load Switches 4670.2002.1.0.92 1 General Description The AAT4670 SmartSwitch™ is part of the Analogic Tech Application Specific Power MOSFET (ASPM™) line of products. The AAT4670 consists of dual, independent, 1A current limited, slew rate controlled P-channel MOSFET power switches with a dedicated source and drain pin assigned to each switch. The internal circuitry automatically derives power from the higher of the two input power source pins with a low operating quiescent current of 18µA. In shutdown mode, the supply current decreases to less than 1µA. The switches operate with inputs ranging from 2.2V to 5.5V, making them ideal for 2.5V, 3V and 5V systems. The dual configuration permits integration of the load switch function for systems with two different power busses. Independent under voltage lockout circuits will shut down the corresponding switch if its input voltage falls below the under voltage lockout threshold. If the die temperature reaches the thermal limit, both switches thermal cycle off and on indefinitely without damage until the thermal condition is removed. An open drain FAULT output signals an over current or over temperature condition for each channel. Input logic levels are TTL compatible. The AAT4670 is available in 8 pin SOP, TSSOP or MSOP specified over -40 to 85 °C temperature range. Features • 2.2V to 5.5V input voltage range • 1A current limit per channel • 95m Ω typical R DS(ON) • Fast transient response: • < 1µs response to short circuit • Low 18µA quiescent current • 1µA max with Switches off • Slew rate controlled • Thermal shutdown • Fault flags with 3ms blanking • Under voltage lockout • Temp range -40 to 85ºC • 8-pin SOP, TSSOP or MSOP packages Applications • Notebook Computer • PDA, Subnotebook • USB ports • Peripheral ports • Hot swap supplies • Media bay Typical Application INA CINA 1 µF CINB 1 µF INB EN FAULTA OUTA GND AAT4670 7 6 1 4 8 INA INB GND GND OUTA EN FAULTA FAULTB FAULTB OUTB 5 OUTB 2 3 COUTA 1 µF COUTB 1 µF |
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