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ADM1072ARQ Folha de dados(PDF) 1 Page - Analog Devices |
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ADM1072ARQ Folha de dados(HTML) 1 Page - Analog Devices |
1 / 8 page Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. = ADM1072 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 World Wide Web Site: http://www.analog.com Fax: 781/326-8703 © Analog Devices, Inc., 2002 Rev. PrE 1/02 Preliminary Technical Data Dual, USB 2.0 Full/Standby Power Controller with Supply Steering FUNCTIONAL BLOCK DIAGRAM 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) GENERAL DESCRIPTION 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. 4 120µF 5 0.2A MAIN FET 0.2A MIRROR FET MIRROR AMPLIFIER MAIN_IN (2.7V TO 5.5V) 4.7µF 3 TEMPERATURE SENSOR 7 14 CURRENT LIMIT AMPLIFIER O N 1 1.24V BANDGAP REFERENCE OVERTEMP ADM1072 10 CURRENT SETTING RESISTOR RPULLUP 10k TO 100k VPULLUP 0 TO 5.5V FLT2 8 15 11 GND CHANNEL 2 IS IDENTICAL TO CHANNEL 1 TO CHANNEL 2 13 OP2 120µF RPULLUP 10k TO 100k VPULLUP 0 TO 5.5V FLT1 6 STBY O N 2 UNDERVOLTAGE SENSOR TO CHANNEL 2 TO CHANNEL 2 TO CHANNEL 2 9 2 1A MIRROR FET 1A MAIN FET 12 STBY_IN (2.7V TO 5.5V) 22µF OP1 16 CONTROL LOGIC 1 |
Nº de peça semelhante - ADM1072ARQ |
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Descrição semelhante - ADM1072ARQ |
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