Top

1.2A, Current-Limited, High-Side P-Channel Switch 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) 1200
Current Limit (mA) (max) 1200
# Power Switches 1
Fault Indicator Yes
Current Limit Accuracy (%) 15
Current Limit Set By Resistor
Lowest Adj. Setting (A) 0.32
RON (Ω) (typ) 0.075
VSUPPLY (V) (min) 2.7
VSUPPLY (V) (max) 5.5
Oper. Temp. (°C) -40 to +85
Package/Pins SOIC (N)/8
Budgetary
Price (See Notes)
1.47
View Less

Simplified Block Diagram

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 .

Parameters

Parametric specs for Current Limit and USB Power Switches
Current Limit (mA) (min) 1200
Current Limit (mA) (max) 1200
# Power Switches 1
Fault Indicator Yes
Current Limit Accuracy (%) 15
Current Limit Set By Resistor
Lowest Adj. Setting (A) 0.32
RON (Ω) (typ) 0.075
VSUPPLY (V) (min) 2.7
VSUPPLY (V) (max) 5.5
Oper. Temp. (°C) -40 to +85
Package/Pins SOIC (N)/8
Budgetary
Price (See Notes)
1.47

Key Features

  • +2.7V to +5.5V Input Range
  • Programmable Current Limit
  • Low Quiescent Current
    • 10µA (typ) at VIN = 3.3V
    • 0.1µA (typ) with Switch Off
  • Thermal Shutdown
  • Active-Low FAULT Indicator Output
  • 0.09Ω (typ) On-Resistance

Applications/Uses

  • Access Bus Slots
  • PCMCIA Slots
  • Portable Equipment

Description

The MAX890L 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 temperatures.

The MAX890L's maximum current limit is 1.2A. The current limit through the switch is programmed with a resistor from SET to ground. The quiescent supply current is a low 10µA. When the switch is off, the supply current decreases to 0.1µA.

The MAX890L is available in an 8-pin SO package.

Simplified Block Diagram

MAX890, MAX890L: Typical Operating Circuit MAX890, MAX890L: 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 .