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High-Accuracy, Adjustable Power Limiter

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

Product Details

Key Features

Applications/Uses

Parametric specs for Overvoltage/Overcurrent Protectors with Internal MOSFETs
VIN (V) (min) 5.5
VIN (V) (max) 60
Current Limit (A) (min) 0.6
Current Limit (A) (max) 6
# Channels 1
Internal Pwr. MOSFETs NMOS
RON (mΩ) (typ) 31
Current Limit Accuracy (%) 10
Fault Response Latchoff
Reverse Current Protect. Yes
Fault Indicator Yes
Oper. Temp. (°C) -40 to +125
Package/Pins TQFN-CU/20
Budgetary
Price (See Notes)
2.09
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Simplified Block Diagram

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Parameters

Parametric specs for Overvoltage/Overcurrent Protectors with Internal MOSFETs
VIN (V) (min) 5.5
VIN (V) (max) 60
Current Limit (A) (min) 0.6
Current Limit (A) (max) 6
# Channels 1
Internal Pwr. MOSFETs NMOS
RON (mΩ) (typ) 31
Current Limit Accuracy (%) 10
Fault Response Latchoff
Reverse Current Protect. Yes
Fault Indicator Yes
Oper. Temp. (°C) -40 to +125
Package/Pins TQFN-CU/20
Budgetary
Price (See Notes)
2.09

Key Features

  • Robust, High-Power Protection Reduces System Downtime
    • Wide Input-Supply Range: +5.5V to +60V
    • Programmable Input-Supply Overvoltage Setting Up To 40V
    • -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
    • 1.5x, 2x Startup Current Limit Options
  • 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

Applications/Uses

  • Control and Automation
  • High-Power Applications
  • Human Machine Interfaces
  • Industrial Power Systems
  • Motion System Drives

Description

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.

Simplified Block Diagram

MAX17525: Functional Diagram MAX17525: Functional Diagram Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .