LTC4381

RECOMMENDED FOR NEW DESIGNS

LTC4381

Low Quiescent Current eFuse with Surge Protection

RECOMMENDED FOR NEW DESIGNS

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Part Models 8

1ku List Price Starting From $4.50

Features

Withstands Surge Voltages Up to 100V
Internal 9mΩ N-Channel MOSFET
Guaranteed Safe Operating Area: 20ms at 70V, 1A
Low Quiescent Current: 6μA Operating
Operates Through Automobile Cold Crank
Wide Operating Voltage Range: 4V to 72V
No Input TVS Needed
Overcurrent Protection
Selectable Internal 28.5V/47V or Adjustable Output Clamp Voltage

Reverse Input Protection to –60V
Adjustable Turn-On Threshold
Adjustable Fault Timer with MOSFET Stress Acceleration
Latchoff and Retry Options
Low Retry Duty Cycle During Faults
32-Lead DFN (7mm × 5mm) Package

Additional Details

The LTC4381 is an integrated solution for low quiescent current eFuse with an internal 9mΩ N-Channel MOSFET. Overvoltage protection is provided by clamping the gate voltage of an internal 9mΩ N-channel MOSFET to limit the output voltage to a safe value during overvoltage events such as load dump in automobiles. The MOSFET safe operating area is production tested and guaranteed for the stresses during high voltage transients. Fixed output clamp voltages are selectable for 12V and 24V/28V systems. For systems of any voltage up to 80V, use the adjustable clamp versions.

Overcurrent protection is also provided. An internal multiplier generates a TMR pin current proportional to V_DS and I_D, 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 6μA operating current permits use in always-on and battery powered applications.

APPLICATIONS

Automotive 12V, 24V and 48V System
Avionic/Industrial Surge Protection
Hot Swap/Live Insertion
High Side Switch for Battery Powered Systems
Automotive Load Dump Protection

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Ask a Question

Submit your question below and we will return the best answer from ADI’s knowledge database:

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Support

Analog Devices Support Portal is a one-stop shop to answer all your ADI questions.

Visit the ADI Support Page

Ask the ADI community for help.

Ask the EngineerZone Community

FAQs

Sales & Ordering FAQs

Part Models 8

1ku List Price Starting From $4.50

Technical Documents 3

LTC4381: Low Quiescent Current eFuse with Surge Protection Data Sheet (Rev.B) 07/27/2023

DC2713A Demo Manual (Rev.0) 04/15/2021

10 A Electronic Fuse Enables Compact Overcurrent Protection for 48 V Power Supplies 12/21/2021

Design Resources 8

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. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LTC4381ADKE-1#PBF	32-Lead Plastic DFN (7mm × 5mm)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC4381ADKE-1#TRPBF	32-Lead Plastic DFN (7mm × 5mm)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC4381ADKE-2#PBF	32-Lead Plastic DFN (7mm × 5mm)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC4381ADKE-2#TRPBF	32-Lead Plastic DFN (7mm × 5mm)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC4381ADKE-3#PBF	32-Lead Plastic DFN (7mm × 5mm)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC4381ADKE-3#TRPBF	32-Lead Plastic DFN (7mm × 5mm)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC4381ADKE-4#PBF	32-Lead Plastic DFN (7mm × 5mm)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC4381ADKE-4#TRPBF	32-Lead Plastic DFN (7mm × 5mm)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys

LTC4381ADKE-1#PBF
Pin/Package Drawing
32-Lead Plastic DFN (7mm × 5mm)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LTC4381ADKE-1#TRPBF
Pin/Package Drawing
32-Lead Plastic DFN (7mm × 5mm)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LTC4381ADKE-2#PBF
Pin/Package Drawing
32-Lead Plastic DFN (7mm × 5mm)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LTC4381ADKE-2#TRPBF
Pin/Package Drawing
32-Lead Plastic DFN (7mm × 5mm)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LTC4381ADKE-3#PBF
Pin/Package Drawing
32-Lead Plastic DFN (7mm × 5mm)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LTC4381ADKE-3#TRPBF
Pin/Package Drawing
32-Lead Plastic DFN (7mm × 5mm)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LTC4381ADKE-4#PBF
Pin/Package Drawing
32-Lead Plastic DFN (7mm × 5mm)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LTC4381ADKE-4#TRPBF
Pin/Package Drawing
32-Lead Plastic DFN (7mm × 5mm)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

DC2713A

LTC4381 6μA IQ Surge Stopper with 9mΩ MOSFET

LTC4381 6μA IQ Surge Stopper with 9mΩ MOSFET

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DC2713A

LTC4381 6μA IQ Surge Stopper with 9mΩ MOSFET

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Product Detail

The DC2713A circuit board enables evaluation of the LTC4381, low quiescent current surge stopper with 9mΩ MOSFET, in 12V to 48V applications. The LTC4381 clamps the output voltage, permitting the load to operate safely through 100V transients and load dump surges such as ISO 16750-2 Test A. Current limiting protects the input supply from output overload and short-circuits. In the presence of a sustained input overvoltage or output overload, the LTC4381 shuts off after a delay to protect the internal power MOSFET.

DC2713A is available in four assembly options, from DC2713A-A to DC2713A-D. DC2713A-A/DC2713A-B employ a jumper to set the output clamp voltage to either 28.5V or 47V, to suit 12V or 24V/28V systems. DC2713A-C/DC2713A-D clamp the output to 66.5V for 48V applications. DC2713A-A/DC2713A-C latch off after a fault, whereas DC2713A-B/DC2713A-D automatically restart after a cool down delay.

Resources

PDF

DC2713A Demo Manual (Rev.0)

375.94 K

ZIP

DC2713A - Design Files

1.6 M

PDF

DC2713A - Schematic

261 K

DC2713A

LTC4381 6μA IQ Surge Stopper with 9mΩ MOSFET

LTspice 1

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