LTC4361-1
LTC4361-2

Overvoltage/Overcurrent Protection Controller

Data Sheet
Rev. C
icon-recommended Recommended for New Designs
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Data Sheet Rev. C
JP Rev. C
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Alternative Parts

LTC4360-1 <br>LTC4360-2
LTC4360-1
LTC4360-2

Overvoltage Protection Controller

LTC4362-1 <br>LTC4362-2
LTC4362-1
LTC4362-2

1.2A Overvoltage/Overcurrent Protector

Overview

Features and Benefits

  • 2.5V to 5.5V Operation
  • Overvoltage Protection Up to 80V
  • No Input Capacitor or TVS Required for Most Applications
  • 2% Accurate 5.8V Overvoltage Threshold
  • 10% Accurate 50mV Overcurrent Circuit Breaker
  • <1μs Overvoltage Turn-Off, Gentle Shutdown
  • Controls N-Channel MOSFET
  • Adjustable Power-Up dV/dt Limits Inrush Current
  • Reverse Voltage Protection
  • Power Good Output
  • Low Current Shutdown
  • Latchoff (LTC4361-1) or Auto-Retry (LTC4361-2) After Overcurrent
  • Available in 8-Lead ThinSOT™ and 8-Lead (2mm × 2mm) DFN Packages

Product Details

The LTC4361 overvoltage/overcurrent protection controller safeguards 2.5V to 5.5V systems from input supply overvoltage. It is designed for portable devices with multiple power supply options including wall adaptors, car battery adaptors and USB ports.

The LTC4361 controls an external N-channel MOSFET in series with the input power supply. During overvoltage transients, the LTC4361 turns off the MOSFET within 1μs, isolating downstream components from the input supply. Inductive cable transients are absorbed by the MOSFET and load capacitance. In most applications, the LTC4361 provides protection from transients up to 80V without requiring transient voltage suppressors or other external components.

The LTC4361 has a delayed start-up and adjustable dV/dt ramp-up for inrush current limiting. A PWRGD pin provides power good monitoring for VIN. The LTC4361 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 LTC4361 automatically restarts with a start-up delay. After an overcurrent fault, the LTC4361-1 remains off while the LTC4361-2 automatically restarts after a 130ms start-up 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

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.

LTspice

LTspice Simulations

LTC4361 Demo Circuit - Protection from Overvoltage and Overcurrent

Models for the following parts are available in LTspice:

LTC4361-1
LTC4361-2

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.

LTC4361-1
LTC4361-2 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.