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Micropower Adjustable Overvoltage Protection Controllers

Product Details

Key Features

Parametric specs for Multifunction PMICs
VIN (V) (min) 4.4
VIN (V) (max) 28
Package/Pins UMAX/10
Budgetary
Price (See Notes)
0
Parametric specs for Overvoltage Protection Controllers
# Channels 5
VIN (V) (min) 2
VIN (V) (max) 28
Over Voltage Trip Level (V) Adjustable (1.1V)
Under Voltage Lockout (V) 2.7
VGATE (V) 9.5
Over Volt. Flag Open-Drain
tGATE (On) (ms) 40
tGATE (Off) (µs) 11
Package/Pins UMAX/10
Budgetary
Price (See Notes)
0
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Simplified Block Diagram

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Parameters

Parametric specs for Multifunction PMICs
VIN (V) (min) 4.4
VIN (V) (max) 28
Package/Pins UMAX/10
Budgetary
Price (See Notes)
0
Parametric specs for Overvoltage Protection Controllers
# Channels 5
VIN (V) (min) 2
VIN (V) (max) 28
Over Voltage Trip Level (V) Adjustable (1.1V)
Under Voltage Lockout (V) 2.7
VGATE (V) 9.5
Over Volt. Flag Open-Drain
tGATE (On) (ms) 40
tGATE (Off) (µs) 11
Package/Pins UMAX/10
Budgetary
Price (See Notes)
0

Key Features

  • Five 3% Accurate Overvoltage Comparators
  • Series PFET Gate Driver with VGS Limiter
  • 21µA Quiescent Supply Current
  • 4µA Shutdown Current
  • 4.4V to 28V Operating Voltage Range
  • 3% Accurate Comparator with 10% Hysteresis for Low-Battery Detection (MAX1808)
  • 28V Open-Drain N-Channel Output (MAX1807)
  • Small 10-Pin µMAX Package

Applications/Uses

  • Multi-Output Power Supplies
  • Notebook Computers
  • Power-Supply Modules

Description

The MAX1807/MAX1808 monitor up to five supply rails for an overvoltage condition and provide a latched output when any one of the five supplies exceeds the trip thresholds. The latched output drives an external P-channel load switch to remove power when an over-voltage condition is detected. The latch is reset when a logic low is input to ON or the power supply is cycled.

The MAX1807 provides a 28V open-drain fault output that can be used to trigger an alert, trip a resetable fuse, or for other purposes. The MAX1808 includes a low-battery comparator with hysteresis to drive the DP output high, turning off the external P-channel switch when the input voltage is too low.

The MAX1807/MAX1808 are available in a miniature 10-pin µMAX® package.

Simplified Block Diagram

MAX1807, MAX1808: Typical Operating Circuit MAX1807, MAX1808: 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 .