MAX893L

19-1450; Rev 0; 7/99 1.2A, Current-Limited, High-Side P-Channel Switch with Thermal Shutdown General Description The MAX893L smart, low-voltage, P-channel, MOSFET power switch is intended for high-side load-switching applications. This switch operates with inputs from +2.7V to +5.5V, making it ideal for both +3V and +5V systems. Internal current-limiting circuitry protects the input supply against overload. Thermal overload protection limits power dissipation and junction temperature. The MAX893L’s maximum programmed current limit is 1.2A. The typical short-circuit current is 1.5 times the programmed current; therefore, a 1.2A programmed limit will result in a 1.8A short-circuit current limit. The current limit through the switch is programmed with a resistor from SET to ground. The quiescent supply current is a low 13µA. When the switch is off, the supply current decreases to 0.1µA. The MAX893L is available in an 8-pin SO package. ____________________________Features o +2.7V to +5.5V Input Range o Programmable Current Limit 0.2A to 1.2A Range ±20% Accuracy o 1.2A Continuous Load Current o 1.8A Short-Circuit Current o Low Quiescent Current 13µA at VIN = 3.3V 0.1µA with Switch Off o Thermal Shutdown o FAULT Indicator Output o 0.07Ω On-Resistance MAX893L ________________________Applications USB Ports USB Hubs PCMCIA Slots Access Bus Slots Portable Equipment PART MAX893LESA Ordering Information TEMP. RANGE -40°C to +85°C PIN-PACKAGE 8 SO Typical Operating Circuit Pin Conf...