MAX1807

Micropower Adjustable Overvoltage Protection Controllers


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

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
Part NumberChannelsVIN
(V)
VIN
(V)
Over Voltage Trip Level
(V)
Under Voltage Lockout
(V)
VGATE
(V)
Over Volt. FlagtGATE (On)
(ms)
tGATE (Off)
(µs)
Package/Pins
minmax
MAX1807 5228Adjustable (1.1V)2.79.5Open-Drain4011
UMAX/10
MAX1808 -
See Data Sheet
See All Overvoltage Protection Controllers (78)

Part NumberPrimary TopologyMonitor/Control FeaturesVIN
(V)
VIN
(V)
Package/Pins
minmax
MAX1807 Amplifier/Buffer
Feedback Integrator
Output OVP
Shutdown
4.428
UMAX/10
MAX1808 
Feedback Integrator
Low Batt./POK Output
Output OVP
Shutdown
UMAX/10
See All Multifunction PMICs (85)
Pricing 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 and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Quality and Environmental Data

Request Reliability Report for: MAX1807 
Lead-Free Package Tin (Sn) Whisker Reports
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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