MAX1808:Micropower Adjustable Overvoltage Protection Controllers

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.

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
MAX1807, MAX1808: Typical Operating Circuit
MAX1807, MAX1808: Typical Operating Circuit
Applications/Uses
  • Multi-Output Power Supplies
  • Notebook Computers
  • Power-Supply Modules
DataSheet
titleDownload file
MAX1807-MAX1808 Data SheetMAX1807-MAX1808.pdf
Parametrics
Part NumberChannelsVIN
(V)
VIN
(V)
Over Voltage Trip Level
(V)
Under Voltage Lockout
(V)
VGATE
(V)
Over Volt. FlagtGATE (On)
(ms)
tGATE (Off)
(µs)
Oper. Temp.
(°C)
Package/Pins
minmax
MAX18075228Adjustable (1.1V)2.79.5Open-Drain4011-40 to +85µMAX/10
MAX1808-µMAX/10

Part NumberPrimary TopologyMonitor/Control FeaturesVIN
(V)
VIN
(V)
Package/Pins
minmax
MAX1807Amplifier/BufferFeedback Integrator
Output OVP
Shutdown
4.428µMAX/10
MAX1808Feedback Integrator
Low Batt./POK Output
Output OVP
Shutdown
µMAX/10
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX1808EUBNo Longer AvailableµMAX,;10 pin;15.4 mm²-40°C to +85°CNo
MAX1808EUB+ActiveµMAX,;10 pin;15.4 mm²-40°C to +85°CLead Free
MAX1808EUB+TActiveµMAX,;10 pin;15.4 mm²-40°C to +85°CLead Free
MAX1808EUB-TNo Longer AvailableMAX1808EUB+TµMAX,;10 pin;15.4 mm²-40°C to +85°CNo
MAX1807-MAX1808.pdf MAX1808
MAX1807-MAX1808.pdf MAX1808