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
- <1μs Overvoltage Turn-Off, Gentle Shutdown
- Controls N-Channel MOSFET
- Adjustable Power-Up dV/dt Limits Inrush
- Reverse Voltage Protection (LTC4360-2)
- Power Good Output
- Low Current Shutdown (LTC4360-1)
- Available in a Tiny 8-Lead SC70 Package
The LTC4360 overvoltage protection controller 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 LTC4360 controls an external N-channel MOSFET in series with the input power supply. During overvoltage transients, the LTC4360 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 LTC4360 provides protection from transients up to 80V without requiring transient voltage suppressors or other external components.
The LTC4360 has a delayed start-up and an adjustable dV/dt ramp-up for inrush current limiting. A PWRGD pin provides power good monitoring for VIN. Following an overvoltage condition, the LTC4360 automatically restarts with a start-up delay. The LTC4360-1 features a soft shutdown controlled by the ON pin, while the LTC4360-2 controls an optional external P-channel MOSFET for negative voltage protection.
- USB Protection
- Handheld Computers
- Cell/Smart Phones
- MP3/MP4 Players
- Digital Cameras
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Tools & Simulations
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.
Models for the following parts are available in LTspice:
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Sample & Buy
The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.