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Current-Limited, High-Side P-Channel Switches with Thermal Shutdown

Low-Resistance P-Channel Switches with Adjustable, Accurate Current Limit Protects Systems and USB

Product Details

Key Features

Parametric specs for Current Limit and USB Power Switches
Current Limit (mA) (min) 250
Current Limit (mA) (max) 250
# Power Switches 1
Fault Indicator Yes
Current Limit Accuracy (%) 15
Current Limit Set By Resistor
Lowest Adj. Setting (A) 0.05
RON (Ω) (typ) 0.25
VSUPPLY (V) (min) 2.7
VSUPPLY (V) (max) 5.5
Oper. Temp. (°C) -40 to +85
Package/Pins UMAX/8
Budgetary
Price (See Notes)
1.73
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Simplified Block Diagram

Technical Docs

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Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.

Parameters

Parametric specs for Current Limit and USB Power Switches
Current Limit (mA) (min) 250
Current Limit (mA) (max) 250
# Power Switches 1
Fault Indicator Yes
Current Limit Accuracy (%) 15
Current Limit Set By Resistor
Lowest Adj. Setting (A) 0.05
RON (Ω) (typ) 0.25
VSUPPLY (V) (min) 2.7
VSUPPLY (V) (max) 5.5
Oper. Temp. (°C) -40 to +85
Package/Pins UMAX/8
Budgetary
Price (See Notes)
1.73

Key Features

  • Ultra-Small µMAX Package-Only 1.11mm High
  • 2.7V to 5.5V Input Range
  • Programmable Current Limit
  • Low 13µA Quiescent Current at VIN = 3.3V, 0.1µA Switch Off
  • Thermal Shutdown
  • FAULT-bar Indicator Output
  • On-Resistances:
    • 0.12Ω (MAX891L)
    • 0.25Ω (MAX892L)

Applications/Uses

  • Access Bus Slots
  • PCMCIA Slots
  • Portable Equipment

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. Thermal-overload 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.

Simplified Block Diagram

MAX891L, MAX892L: Typical Operating Circuit MAX891L, MAX892L: Typical Operating Circuit Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.