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Overview
Features and Benefits
- Low Quiescent Current: 8µA Operating
- Withstands Surge Voltage Up to the MOSFET Limit
- Wide Operating Voltage Range: 4V to 72V
- Overcurrent Protection
- Selectable Internal 31.5V/50V or Adjustable Gate Clamp Voltage
- Reverse Input Protection to –60V
- Adjustable Turn-On Threshold
- Adjustable Fault Timer with MOSFET Stress Acceleration
- Controls N-Channel MOSFET
- Latchoff and Retry Options
- Low Retry Duty Cycle During Faults
- 10-Pin DFN (3mm × 3mm) and MSOP Packages
- AEC-Q100 Qualified for Automotive Applications
Product Details
The LTC4380 low quiescent current surge stopper protects loads from high voltage transients. Overvoltage protection is provided by clamping the gate voltage of an external N-channel MOSFET to limit the output voltage to a safe value during overvoltage events such as load dump in automobiles. Fixed gate clamp voltages are selectable for 12V and 24V/28V systems. For systems of any voltage up to 72V, use the adjustable gate clamp versions. Overcurrent protection is also provided.
An internal multiplier generates a TMR pin current proportional to VDS and ID, so that operating time in both overcurrent and overvoltage conditions is limited in accordance with MOSFET stress.
The GATE pin can drive back-to-back MOSFETs for reverse input protection, eliminating the voltage drop and dissipation of a Schottky diode solution. A low 8µA operating current permits use in always-on and battery powered applications. An accurate ON pin comparator monitors the input supply for undervoltage (UV) conditions and also serves as a shutdown input, reducing the quiescent current to 6µA.
Applications
- Automotive/Avionic/Industrial Surge Protection
- Hot Swap, Live Insertion
- High Side Switch for Battery Powered Systems
- Automotive Load Dump Protection
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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 (2)
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Reliability Data (1)
Product Information (1)
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Tools & Simulations
LTspice
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Models for the following parts are available in LTspice:
Reference Materials
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Surge Stoppers Video Product Brief
Low Iq Surge Stopper for High Reliability Current Sensitive Applications
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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.
