MAX4925:Overvoltage Protectors with External pFET

Provides Overvoltage Protection for up to +28V

The MAX4923–MAX4926 overvoltage protection (OVP) controllers protect low-voltage systems against high-voltage faults of up to +28V with an appropriate external pFET. When the input voltage exceeds the overvoltage lockout (OVLO) threshold, or falls below the undervoltage lockout (UVLO) threshold, these devices turn off the pFET to prevent damage to protected components and issue a flag to notify the processor of a fault condition. The typical overvoltage trip level is set to 7.18V (MAX4923), 6.16V (MAX4924), 5.65V (MAX4925), and 4.46V (MAX4926). The undervoltage trip level is set to 2.44V (typ) for all devices. The input (IN) is ESD protected to ±15kV HBM when bypassed to ground with a 1µF ceramic capacitor. All devices are offered in a small, 6-pin (1.5mm x 1.0mm) µDFN package and are specified over the extended -40°C to +85°C temperature range.

Key Features
  • Overvoltage Protection Up to +28V
  • Preset 7.18V, 6.16V, 5.65V, and 4.46V Typical Overvoltage Trip Levels
  • Preset 2.44V Typical Undervoltage Trip Level
  • ±2.5% Accurate Overvoltage/Undervoltage Trip Levels
  • Low 13µA (typ) Supply Current
  • Drives External pFET
  • 20ms Adapter Debounce Time
  • Fault Flag Indicator
  • 6-Pin (1.5mm x 1.0mm) µDFN Package
MAX4923, MAX4924, MAX4925, MAX4926: Typical Operating Circuit
MAX4923, MAX4924, MAX4925, MAX4926: Typical Operating Circuit
Applications/Uses
  • Cell Phones
  • Digital Still Cameras
  • MP3 Players
  • PDAs and Palmtop Devices
DataSheet
titleDownload file
MAX4923-MAX4926 Data SheetMAX4923-MAX4926.pdf
Parametrics
Part NumberChannelsVIN
(V)
VIN
(V)
Over Voltage Trip Level
(V)
Under Voltage Lockout
(V)
Over Volt. FlagtGATE (On)
(ms)
tGATE (Off)
(µs)
Package/PinsBudgetary
Price
minmaxSee Notes
MAX492311.8287.182.44Open-Drain205See Data Sheet-
MAX49246.15µDFN/6-
MAX49255.65µDFN/6$1.85 @1k
MAX49264.46µDFN/6-
Quality and Environmental Data
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX4925ELT+ActiveµDFN,;6 pin;1.6 mm²-40°C to +85°CLead Free
MAX4925ELT+TActiveµDFN,;6 pin;1.6 mm²-40°C to +85°CLead Free
MAX4923-MAX4926.pdf MAX4926
MAX4925.pdf MAX4925
MAX4923-MAX4926.pdf MAX4924