Features and Benefits

  • -42V to +76V Protection Range
    • ​Relaxes TVS Diodes Requirements
  • 4V to 57V Operating Range
    • Accommodates Wide Automotive Supply Rails
  • 9V Gate Drive Voltage with Respect to SRC
    • ​Reduces MOSFET Power Dissipation
  • Enable Input 
    • ​Provides On-the-Fly System Control
  • 1µA Shutdown Current
    • Extends Battery Life
  • 600ns Reverse-Current Blocking Time with 10mV Overdrive
    • ​Extends System Operation Time During Power Interruption
  • -40°C to +125°C Automotive Temperature Range
  • 2mm x 3mm, Side-Wettable TDFN Package

Product Details

The MAX16171 is an ideal diode controller that protects the load against damaging automotive transients down to -42V and blocks reverse-current flow within 600ns. The MAX16171 operates over a wide supply voltage range of 4V to 57V and withstands input transients up to 76V. In light load applications, the device regulates the voltage drop across the external MOSFET to 20mV, allowing smooth, ring-free operation. At heavy load, the charge pump drives the gate of the external MOSFET into an enhanced mode of operation and significantly improves efficiency and power dissipation compared to traditionally used Schottky diodes.

The MAX16171 consumes only 1μA of current during shutdown mode (VEN = GND) to extend battery life while providing standby power to the load through the body diode of the external MOSFET. An internal 2.5MΩ resistor between GATE and SRC keeps the external MOSFET off when the input voltage drops below ground.

The MAX16171 is available in a tiny 2mm x 3mm x 0.75mm, 8-pin TDFN package with side-wettable flanks and operates over the -40°C to +125°C automotive temperature range.


  • Automotive Power Systems
  • Network Telecom Power Systems
  • RAID Systems
  • Redundant Power Supplies
  • Servers

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

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Product Recommendations

MAX16171 Companion Parts

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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.