• 简体中文
• English

MAX17525：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.

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

MAX17525: Functional Diagram Applications/Uses Control and Automation High-Power Applications Human Machine Interfaces Industrial Power Systems Motion System Drives

DataSheet

Parametrics

Design kits & evaluation modules

• MAX17525EVKIT

Ordering Information