3.5V to 36V Ideal Diode Controller with Voltage and Current Circuit Breaker

Protect Automotive Supplies from Reverse Current Conduction and Down Stream Loads from High Voltage/Current Transients

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The MAX16141, an ideal diode controller, provides system protection against a variety of system faults, such as reverse-current, overcurrent, input overvoltage/undervoltage, and overtemperature conditions. The wide operating voltage range of 3.5V to 36V, combined with 5μA (typ) of shutdown current, make the MAX16141 ideal for automotive applications. An integrated charge pump drives the gate of the back-to-back external nFETs 9V above the source connection, minimizing power loss between the source and the load.

A fast-acting comparator allows the MAX16141 to block reverse-current flow within 1μs (max) of the input falling below the output voltage. An external current-sense resistor between RS and OUT provides overload monitoring capability. Two input pins, OVSET and UVSET, provide set points to protect against input overvoltage and undervoltage events using a simple resistive-divider.

During startup, the MAX16141 monitors the voltage drop across the external nFETs (VIN - VOUT) to ensure VOUT is greater than 0.9 x VIN. Once the startup event is complete, the MAX16141 is ready to protect against systems faults. During normal operation, some systems experience brownouts or short interruptions of power. To ensure smooth system recovery from these interruptions, the MAX16141 includes a secondary power input (VCC) to keep critical circuits alive. When the main input power recovers, the MAX16141 enables the gate in fast mode (70μs, typ) to charge the output capacitor.

Additional features include a low-power mode that allows the MAX16141 to source limited power to the load, an internal switch that helps save power during shutdown mode, and a fault output that asserts during fault conditions.

The MAX16141 is available in a 4mm x 4mm x 0.75mm, 16-pin TQFN package and operates over the automotive temperature range of -40°C to +125°C.
MAX16141: Functional Diagram MAX16141: Functional Diagram Enlarge+

Key Features

  • Wide Voltage Range
    • 3.5V to 36V Operating Voltage Range
    • -36V to +60V Protection Voltage Range
  • Eliminates Discrete Diode Power Dissipation
  • Low-Power Shutdown Reduces Battery Drain
    • 5μA (Typ) Shutdown Current
    • Term Switch Isolates UVLO and OVLO Circuitry in Shutdown
  • Isolates Failed Supply from Load
    • Bidirectional Current Blocking On Open
    • Bidirectional Voltage Blocking On Open
  • Current Protection
    • Factory Adjustable Overcurrent Trip Thresholds
    • Factory Adjustable Reverse-Current Trip Thresholds
  • Resistor Adjustable Overvoltage and Undervoltage Trip Thresholds
  • Automotive Qualified
    • Operates Down to +3.5V, Riding Out Cold-Crank Conditions
    • -40°C to +125°C Operating Temperature Range
  • N-Channel MOSFET Gate Driver of VIN + 8V
  • Fault Output
    • UVLO, OVLO, Overcurrent, Reverse-Current, and Thermal Shutdown


  • Automotive Power Systems
  • Network/Telecom Power Systems
  • PoE Systems
  • RAID Systems
  • Servers
Part NumberChannelsVIN
Over Voltage Trip Level
Under Voltage Lockout
Over Volt. FlagtGATE (On)
tGATE (Off)
Oper. Temp.
minmaxSee Notes
MAX16141 NEW!13.536AdjustableAdjustable9Open-Drain
-40 to +125
$1.70 @1k
See All Overvoltage Protection Controllers (84)
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.

MAX16141: 3.5V to 36V Ideal Diode Controller with Voltage and Current Circuit Breaker
MAX16141EVKIT: Evaluation Kit for the MAX16141

Quality and Environmental Data

Request Reliability Report for: MAX16141 
Lead-Free Package Tin (Sn) Whisker Reports
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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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Related Resources

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  • Factory-Set Reset Threshold Options from +2.3V to +11.6V
  • Manual Reset Input
  • Guaranteed Reset Valid to VCC ≥ 1.3V

3.5V to 36V Ideal Diode Controller with Voltage and Current Circuit Breaker

  • Wide Voltage Range
  • Eliminates Discrete Diode Power Dissipation
  • Low-Power Shutdown Reduces Battery Drain