MAX891L

19-1223; Rev 0; 4/97 Current-Limited, High-Side P-Channel Switches with Thermal Shutdown _______________General Description The MAX891L/MAX892L smart, low-voltage, P-channel, MOSFET power switches are intended for high-side load-switching applications. These switches operate with inputs from 2.7V to 5.5V, making them ideal for both 3V and 5V systems. Internal current-limiting circuitry protects the input supply against overload. Thermaloverload protection limits power dissipation and junction temperatures. The MAX891L/MAX892L’s maximum current limits are 500mA and 250mA, respectively. The current limit through the switch is programmed with a resistor from SET to ground. When the switch is on, the quiescent supply current is a low 13µA. When the switch is off, the quiescent current decreases to 0.1µA. The MAX891L/MAX892L are available in 8-pin µMAX packages. ____________________________Features o Ultra-Small µMAX Package—Only 1.11mm High o 2.7V to 5.5V Input Range o Programmable Current Limit o Low 13µA Quiescent Current at VIN = 3.3V, 0.1µA Switch Off o Thermal Shutdown o FAULT Indicator Output o On-Resistances: 0.12Ω (MAX891L) 0.25Ω (MAX892L) MAX891L/MAX892L ________________________Applications PCMCIA Slots Access Bus Slots Portable Equipment ______________Ordering Information PART MAX891LC/D MAX891LEUA* MAX892LC/D MAX892LEUA* TEMP. RANGE 0°C to +70°C -40°C to +85°C 0°C to +70°C -40°C to +85°C PINCURRENT PACKAGE LIMIT Dice** 8 µMAX Dice** 8 µMAX 500mA 500mA 250mA 250mA ...