LTC4380 - Low Quiescent Current Surge Stopper

Features

  • 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

Typical Application

LTC4380 Typical Application
LTC4380 Typical Application

Description

The LTC®4380 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.

Packaging

CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
Drawing
RoHS
LTC4380CDD-1#PBF 3x3 DFN-10 DD C 05-08-1699 Yes
LTC4380CDD-1#TRPBF 3x3 DFN-10 DD C 05-08-1699 Yes
LTC4380CDD-2#PBF 3x3 DFN-10 DD C 05-08-1699 Yes
LTC4380CDD-2#TRPBF 3x3 DFN-10 DD C 05-08-1699 Yes
LTC4380CDD-3#PBF 3x3 DFN-10 DD C 05-08-1699 Yes
LTC4380CDD-3#TRPBF 3x3 DFN-10 DD C 05-08-1699 Yes
LTC4380CDD-4#PBF 3x3 DFN-10 DD C 05-08-1699 Yes
LTC4380CDD-4#TRPBF 3x3 DFN-10 DD C 05-08-1699 Yes
LTC4380CMS-1#PBF MS-10 MS C 05-08-1661 Yes
LTC4380CMS-1#TRPBF MS-10 MS C 05-08-1661 Yes
LTC4380CMS-2#PBF MS-10 MS C 05-08-1661 Yes
LTC4380CMS-2#TRPBF MS-10 MS C 05-08-1661 Yes
LTC4380CMS-3#PBF MS-10 MS C 05-08-1661 Yes
LTC4380CMS-3#TRPBF MS-10 MS C 05-08-1661 Yes
LTC4380CMS-4#PBF MS-10 MS C 05-08-1661 Yes
LTC4380CMS-4#TRPBF MS-10 MS C 05-08-1661 Yes
LTC4380HDD-1#PBF 3x3 DFN-10 DD H 05-08-1699 Yes
LTC4380HDD-1#TRPBF 3x3 DFN-10 DD H 05-08-1699 Yes
LTC4380HDD-2#PBF 3x3 DFN-10 DD H 05-08-1699 Yes
LTC4380HDD-2#TRPBF 3x3 DFN-10 DD H 05-08-1699 Yes
LTC4380HDD-3#PBF 3x3 DFN-10 DD H 05-08-1699 Yes
LTC4380HDD-3#TRPBF 3x3 DFN-10 DD H 05-08-1699 Yes
LTC4380HDD-4#PBF 3x3 DFN-10 DD H 05-08-1699 Yes
LTC4380HDD-4#TRPBF 3x3 DFN-10 DD H 05-08-1699 Yes
LTC4380HMS-1#PBF MS-10 MS H 05-08-1661 Yes
LTC4380HMS-1#TRPBF MS-10 MS H 05-08-1661 Yes
LTC4380HMS-2#PBF MS-10 MS H 05-08-1661 Yes
LTC4380HMS-2#TRPBF MS-10 MS H 05-08-1661 Yes
LTC4380HMS-3#PBF MS-10 MS H 05-08-1661 Yes
LTC4380HMS-3#TRPBF MS-10 MS H 05-08-1661 Yes
LTC4380HMS-4#PBF MS-10 MS H 05-08-1661 Yes
LTC4380HMS-4#TRPBF MS-10 MS H 05-08-1661 Yes
LTC4380IDD-1#PBF 3x3 DFN-10 DD I 05-08-1699 Yes
LTC4380IDD-1#TRPBF 3x3 DFN-10 DD I 05-08-1699 Yes
LTC4380IDD-2#PBF 3x3 DFN-10 DD I 05-08-1699 Yes
LTC4380IDD-2#TRPBF 3x3 DFN-10 DD I 05-08-1699 Yes
LTC4380IDD-3#PBF 3x3 DFN-10 DD I 05-08-1699 Yes
LTC4380IDD-3#TRPBF 3x3 DFN-10 DD I 05-08-1699 Yes
LTC4380IDD-4#PBF 3x3 DFN-10 DD I 05-08-1699 Yes
LTC4380IDD-4#TRPBF 3x3 DFN-10 DD I 05-08-1699 Yes
LTC4380IMS-1#PBF MS-10 MS I 05-08-1661 Yes
LTC4380IMS-1#TRPBF MS-10 MS I 05-08-1661 Yes
LTC4380IMS-2#PBF MS-10 MS I 05-08-1661 Yes
LTC4380IMS-2#TRPBF MS-10 MS I 05-08-1661 Yes
LTC4380IMS-3#PBF MS-10 MS I 05-08-1661 Yes
LTC4380IMS-3#TRPBF MS-10 MS I 05-08-1661 Yes
LTC4380IMS-4#PBF MS-10 MS I 05-08-1661 Yes
LTC4380IMS-4#TRPBF MS-10 MS I 05-08-1661 Yes


LTC4380 Package Drawing
LTC4380 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
(1-99)
Price
(1k)*
RoHS
LTC4380CDD-1#PBF 3x3 DFN-10 C $3.54 $2.48 Yes
LTC4380CDD-1#TRPBF 3x3 DFN-10 C $3.60 $2.54 Yes
LTC4380CDD-2#PBF 3x3 DFN-10 C $3.54 $2.48 Yes
LTC4380CDD-2#TRPBF 3x3 DFN-10 C $3.60 $2.54 Yes
LTC4380CDD-3#PBF 3x3 DFN-10 C $3.54 $2.48 Yes
LTC4380CDD-3#TRPBF 3x3 DFN-10 C $3.60 $2.54 Yes
LTC4380CDD-4#PBF 3x3 DFN-10 C $3.54 $2.48 Yes
LTC4380CDD-4#TRPBF 3x3 DFN-10 C $3.60 $2.54 Yes
LTC4380CMS-1#PBF MS-10 C $3.54 $2.48 Yes
LTC4380CMS-1#TRPBF MS-10 C $3.60 $2.54 Yes
LTC4380CMS-2#PBF MS-10 C $3.54 $2.48 Yes
LTC4380CMS-2#TRPBF MS-10 C $3.60 $2.54 Yes
LTC4380CMS-3#PBF MS-10 C $3.54 $2.48 Yes
LTC4380CMS-3#TRPBF MS-10 C $3.60 $2.54 Yes
LTC4380CMS-4#PBF MS-10 C $3.54 $2.48 Yes
LTC4380CMS-4#TRPBF MS-10 C $3.60 $2.54 Yes
LTC4380HDD-1#PBF 3x3 DFN-10 H $4.48 $3.14 Yes
LTC4380HDD-1#TRPBF 3x3 DFN-10 H $4.54 $3.20 Yes
LTC4380HDD-2#PBF 3x3 DFN-10 H $4.48 $3.14 Yes
LTC4380HDD-2#TRPBF 3x3 DFN-10 H $4.54 $3.20 Yes
LTC4380HDD-3#PBF 3x3 DFN-10 H $4.48 $3.14 Yes
LTC4380HDD-3#TRPBF 3x3 DFN-10 H $4.54 $3.20 Yes
LTC4380HDD-4#PBF 3x3 DFN-10 H $4.48 $3.14 Yes
LTC4380HDD-4#TRPBF 3x3 DFN-10 H $4.54 $3.20 Yes
LTC4380HMS-1#PBF MS-10 H $4.48 $3.14 Yes
LTC4380HMS-1#TRPBF MS-10 H $4.54 $3.20 Yes
LTC4380HMS-2#PBF MS-10 H $4.48 $3.14 Yes
LTC4380HMS-2#TRPBF MS-10 H $4.54 $3.20 Yes
LTC4380HMS-3#PBF MS-10 H $4.48 $3.14 Yes
LTC4380HMS-3#TRPBF MS-10 H $4.54 $3.20 Yes
LTC4380HMS-4#PBF MS-10 H $4.48 $3.14 Yes
LTC4380HMS-4#TRPBF MS-10 H $4.54 $3.20 Yes
LTC4380IDD-1#PBF 3x3 DFN-10 I $4.07 $2.85 Yes
LTC4380IDD-1#TRPBF 3x3 DFN-10 I $4.13 $2.91 Yes
LTC4380IDD-2#PBF 3x3 DFN-10 I $4.07 $2.85 Yes
LTC4380IDD-2#TRPBF 3x3 DFN-10 I $4.13 $2.91 Yes
LTC4380IDD-3#PBF 3x3 DFN-10 I $4.07 $2.85 Yes
LTC4380IDD-3#TRPBF 3x3 DFN-10 I $4.13 $2.91 Yes
LTC4380IDD-4#PBF 3x3 DFN-10 I $4.07 $2.85 Yes
LTC4380IDD-4#TRPBF 3x3 DFN-10 I $4.13 $2.91 Yes
LTC4380IMS-1#PBF MS-10 I $4.07 $2.85 Yes
LTC4380IMS-1#TRPBF MS-10 I $4.13 $2.91 Yes
LTC4380IMS-2#PBF MS-10 I $4.07 $2.85 Yes
LTC4380IMS-2#TRPBF MS-10 I $4.13 $2.91 Yes
LTC4380IMS-3#PBF MS-10 I $4.07 $2.85 Yes
LTC4380IMS-3#TRPBF MS-10 I $4.13 $2.91 Yes
LTC4380IMS-4#PBF MS-10 I $4.07 $2.85 Yes
LTC4380IMS-4#TRPBF MS-10 I $4.13 $2.91 Yes
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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 Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Part Number Description Price Documentation
DC2178A-A LTC4380IDD-1 Demo Board | Low Quiescent Current Surge Stopper, Latchoff Version $75.00
DC2178A-B LTC4380IDD-2 Demo Board | Low Quiescent Current Surge Stopper, Auto-Retry Version $75.00
Buy Now
Click here to view our complete list of demo boards

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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Design Tools

LTspice

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Models for the following parts are available in LTspice:
LTC4380-1
LTC4380-2
LTC4380-3
LTC4380-4

Technical Support