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 (Table 1)
- Reverse Input Protection to –60V
- Adjustable Turn-On Threshold
- Adjustable Fault Timer with MOSFET Stress Acceleration
- Controls N-Channel MOSFET
- Latchoff and Retry Options (Table 1)
- Low Retry Duty Cycle During Faults (Table 1)
- 10-Pin DFN (3mm × 3mm) and MSOP Packages
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
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.
Evaluation Kits (2)
Documentation
Reliability Data (1)
Solutions Bulletins & Brochures (1)
Product Information (1)
Evaluation Kit Manuals (1)
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.
Models for the following parts are available in LTspice:
Reference Materials
Product Selector Card (2)
Solutions Bulletins & Brochures (1)
Technical Articles (1)
Surge Stoppers Video Product Brief
Low Iq Surge Stopper for High Reliability Current Sensitive Applications
Press Releases (1)
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.
Discussions
LTC4380 Discussions
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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.
