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MAX893L
1.2A, Current-Limited, High-Side P-Channel Switch with Thermal Shutdown

1.2A Current-Limited, High-Side P-Channel Switch with Thermal Shutdown


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Description
FULL DATA SHEET (PDF, 128kB)
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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.

Key Features   Applications/Uses
  • +2.7V to +5.5V Input Range
  • Programmable Current Limit
    • 0.2A to 1.2A Range
    • ±20% Accuracy
  • 1.2A Continuous Load Current
  • 1.8A Short-Circuit Current
  • Low Quiescent Current
    • 13µA at VIN = 3.3V
    • 0.1µA with Switch Off
  • Thermal Shutdown
  • Active-low FAULT Indicator Output
  • 0.07Ω On-Resistance

 
  • Access Bus Slots
  • PCMCIA Slots
  • Portable Equipment
  • USB Hubs
  • USB Ports

    Key Specifications:   USB Power Switches
    Part Number Number of Switches Max. Load Current (A) RON (typ) (Ω) Fault Indicator Switch Op. Voltage Range (V) RoHS Available Package Smallest Available Package (max w/pins) (mm2) Operating Temp. Range (°C) Price**
    MAX893L  1 1.2 0.07 Yes 2.7 to 5.5 Yes SOIC/8 31 -40 to +85 $0.80 @ 1k
    See All USB Power Switches (28)
    Notes:
    **This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

    Diagram
    MAX893L: Typical Operating Circuit
    Typical Operating Circuit

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    Document Ref.: 19-1450; Rev 0; 1999-07-01
    This page last modified: 2007-07-23



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