LTC4362-1
LTC4362-2

1.2A Overvoltage/Overcurrent Protector

Data Sheet
Rev. B
icon-recommended Recommended for New Designs
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Datasheet
Data Sheet Rev. B
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Alternative Parts

LT4363
LT4363

High Voltage Surge Stopper with Current Limit

LTC4361-1 <br>LTC4361-2
LTC4361-1
LTC4361-2

Overvoltage/Overcurrent Protection Controller

Overview

Features and Benefits

  • 2.5V to 5.5V Operation
  • Overvoltage Protection Up to 28V
  • Internal 40mΩ N-Channel MOSFET and 31mΩ RSENSE
  • Avalanche Rated MOSFET Requires No Input Capacitor or TVS for Most Applications
  • <1μs Overvoltage Turn-Off, Gentle Shutdown
  • 2% Accurate 5.8V Overvoltage Threshold
  • 20% Accurate 1.5A Overcurrent Threshold
  • Input Withstands Up to ±25kV HBM ESD with 1μF COUT
  • Controlled Power-Up dV/dt Limits Inrush Current
  • Reverse Voltage Protection Driver
  • Low Current Shutdown
  • Latchoff (LTC4362-1) or Auto-Retry (LTC4362-2) After Overcurrent
  • Available in 8-Lead DFN 2mm × 3mm Package

Product Details

The LTC4362 monolithic overvoltage/overcurrent protector safeguards 2.5V to 5.5V systems from power supply overvoltage. It is designed for portable devices with multiple power supply options including wall adaptors, car battery adaptors and USB ports.

The LTC4362 controls an internal 40mΩ N-channel MOSFET in series with the input power supply. During overvoltage transients, the LTC4362 turns off the MOSFET within 1μs, isolating downstream components from the input supply. In most applications, the LTC4362 rides through inductive cable transients without requiring transient voltage suppressors or other external components. An internal current sense resistor is used to implement overcurrent protection.

The LTC4362 has a delayed start-up at plug-in and controlled dV/dt ramp-up for inrush current limiting. A PWRGD pin provides power good monitoring for VIN. The LTC4362 features a soft-shutdown controlled by the ON pin and drives an optional external P-channel MOSFET for negative voltage protection. Following an overvoltage condition, the LTC4362 automatically restarts with a 130ms delay. After an overcurrent fault, the LTC4362-1 remains off while the LTC4362-2 automatically restarts after a 130ms delay.

Applications

  • USB Protection
  • Handheld Computers
  • Cell/Smart Phones
  • MP3/MP4 Players
  • Digital Cameras

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Product Lifecycle icon-recommended Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

Evaluation Kits (1)

Documentation

Tools & Simulations

LTspice

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LTspice

Models for the following parts are available in LTspice:

LTC4362-1
LTC4362-2

Reference Materials

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

LTC4362-1
LTC4362-2 Material Declaration
Quality And Reliability
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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.