ADM869L

a FEATURES 2 A Load Current 45 m ⍀ On Resistance User-Settable Current Limit 12 ␮ A Typical Quiescent Current 10 nA Typical Shutdown Current 40 nA Typical Switch Off Leakage Short-Circuit Protection Thermal Shutdown FAULT Output Small, 16-Lead QSOP Package APPLICATIONS Desktop Computers Palmtop Computers Notebook Computers Hand-Held Instruments Universal Serial Bus (USB) 2 A, High-Side P-Channel Switch with Current Limit and Thermal Shutdown ADM869L GENERAL DESCRIPTION The ADM869L is a logic controlled P-channel switch with low on resistance, capable of sourcing up to 2 A from supply voltages between 2.7 V and 5.5 V. A user-settable current limit allows the trip current to be set between 400 mA and 2 A with an accuracy of ± 21%. This allows the system power supply to be protected against short circuits and surge currents in peripheral loads powered via the ADM869L. Over-current and overtemperature conditions are signalled by a FAULT output. The ADM869L also offers low quiescent current of typically 12 µA and shutdown current of typically 10 nA. FUNCTIONAL BLOCK DIAGRAM MAIN FET OUT IN (2.7V TO 5.5V) MIRROR AMPLIFIER MIRROR FET ON 22␮F SET CURRENT LIMIT AMPLIFIER ON VPULLUP 0 TO 5.5V 1.24V BANDGAP REFERENCE ON ON ON TEMPERATURE SENSOR AND CONTROL OVERTEMP CIRCUITRY FAULT 0.1␮F ADM869L RSET RPULLUP 10k⍀ TO 100k⍀ GND REV. A Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its us...