High-Accuracy, Adjustable Power Limiter

Industry's First Dynamic Power Limiter with Thermal Controlled Current Foldback with Fast & Slow Comparator


The MAX17525 adjustable overvoltage, undervoltage, and overcurrent protection device guards systems against overcurrent faults in addition to positive overvoltage and reverse-voltage faults. When used with an optional external pMOSFET, the device also protects downstream circuitry from voltage faults up to ±60V (for -60V external pFET rating. The device features a low, 31mΩ, on-resistance integrated FET.

During startup, the devices are designed to charge large capacitances on the output in a continuous mode for applications where large reservoir capacitors are used on the inputs to downstream devices. Additionally, the devices feature a dual-stage, current-limit mode in which the current is continuously limited to 1x, 1.5x, and 2x the programmed limit, respectively, for a short time after startup. This enables faster charging of large loads during startup.

The MAX17525 also feature reverse-current and overtemperature protection. The devices are available in a 20-pin (5mm x 5mm) TQFN package and operate over the -40°C to 125°C temperature range.
MAX17525: Functional Diagram MAX17525: Functional Diagram Enlarge+

Key Features

  • Robust, High-Power Protection Reduces System Downtime
    • Wide Operating Input Range: +5.5V to +60V
    • -60V Negative Input Tolerance with External pFET (for -(60 + VOUT) External pFET Rating)
    • Low 31mΩ (typ) RON
    • Reverse Current-Blocking Protection with External pFET
  • Enables Fast Startup and Brownout Recovery
    • Thermal Foldback Current-Limit Protection
  • Flexible Design Enables Reuse and Less Requalification
    • Adjustable OVLO and UVLO Thresholds
    • Programmable Forward Current Limit From 0.6A to 6A with ±15% Accuracy Over Full Temperature Range
    • Normal and High-Voltage Enable Inputs (EN and Active-Low HVEN)
    • Protected External pFET Gate Drive
  • Saves Board Space and Reduces External BOM Count
    • 20-Pin 5mm x 5mm TQFN Package
    • Integrated nFET


  • Control and Automation
  • High-Power Applications
  • Human Machine Interfaces
  • Industrial Power Systems
  • Motion System Drives
Part Number Channels VIN
Internal Pwr. MOSFETs RON
Current Limit
Current Limit
Current Limit Accuracy
Fault Response Reverse Current Protect. Fault Indicator Oper. Temp.
Package/Pins Budgetary
min max typ min max See Notes
MAX17525  1 5.5 60 NMOS 31 0.6 6 10 Latchoff Yes Yes -40 to +125
$1.99 @1k
See All Overvoltage/Overcurrent Protectors with Internal MOSFETs (17)
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.

MAX17525EVKIT: Evaluation Kit for the MAX17525

Quality and Environmental Data

Request Reliability Report for: MAX17525 
Lead-Free Package Tin (Sn) Whisker Reports

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