LTC4231

RECOMMENDED FOR NEW DESIGNS

Micropower Hot Swap Controller

Data Sheet (Rev. B) Product Selection Table

Part Models: 32
1ku List Price: Starting From $2.72

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Part Details

Enables Safe Board Insertion and Removal from a Power Supply
4µA Supply Current
0.3µA Shutdown Current
Wide Operating Voltage Range: 2.7V to 36V
Reverse Supply Protection to –40V
Adjustable Analog Current Limit with Circuit Breaker

Automatic Retry or Latchoff on Current Fault
Overvoltage and Undervoltage Monitoring
Controls Single or Back-to-Back N-Channel MOSFETs
12-Lead MSOP and 3mm × 3mm QFN Packages
AEC-Q100 Qualified for Automotive Applications

Part Models: 32
1ku List Price: Starting From $2.72

Documentation

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
LTC4231CMS-1#PBF	12-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC4231CMS-1#TRPBF	12-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC4231CMS-2#PBF	12-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC4231CMS-2#TRPBF	12-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC4231CUD-1#PBF	12-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC4231CUD-1#TRPBF	12-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC4231CUD-2#PBF	12-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC4231CUD-2#TRPBF	12-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC4231HMS-1#PBF	12-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC4231HMS-1#TRPBF	12-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC4231HMS-1#WPBF	12-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC4231HMS-1#WTRPBF	12-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC4231HMS-2#PBF	12-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC4231HMS-2#TRPBF	12-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC4231HMS-2#WPBF	12-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC4231HMS-2#WTRPBF	12-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC4231HUD-1#PBF	12-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC4231HUD-1#TRPBF	12-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC4231HUD-2#PBF	12-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC4231HUD-2#TRPBF	12-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC4231IMS-1#PBF	12-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC4231IMS-1#TRPBF	12-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC4231IMS-1#WPBF	12-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC4231IMS-1#WTRPBF	12-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC4231IMS-2#PBF	12-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC4231IMS-2#TRPBF	12-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC4231IMS-2#WPBF	12-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC4231IMS-2#WTRPBF	12-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC4231IUD-1#PBF	12-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC4231IUD-1#TRPBF	12-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC4231IUD-2#PBF	12-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC4231IUD-2#TRPBF	12-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Apr 17, 2025 - 25_0119 Bond Wire Change from Gold to Copper (Automotive)
		PCN25_0119_Form Material_Report Delta Qualification Matrix Qualification Results Summary
LTC4231CMS-1#PBF	PRODUCTION
LTC4231CMS-1#TRPBF	PRODUCTION
LTC4231CMS-2#PBF	PRODUCTION
LTC4231CMS-2#TRPBF	PRODUCTION
LTC4231HMS-2#WPBF	PRODUCTION
LTC4231HMS-2#WTRPBF	PRODUCTION
LTC4231IMS-1#PBF	PRODUCTION
LTC4231IMS-1#TRPBF	PRODUCTION
LTC4231IMS-1#WPBF	PRODUCTION
LTC4231IMS-1#WTRPBF	PRODUCTION
LTC4231IMS-2#WPBF	PRODUCTION
LTC4231IMS-2#WTRPBF	PRODUCTION
Feb 4, 2020 - 20_0129 Laser Mark Conversion for 12-Lead MSOP Packages Assembled in ADPG and UTAC
		PCN20_0129_Form Material_Report
LTC4231CMS-1#PBF	PRODUCTION
LTC4231CMS-1#TRPBF	PRODUCTION
LTC4231CMS-2#PBF	PRODUCTION
LTC4231CMS-2#TRPBF	PRODUCTION
LTC4231HMS-1#PBF	PRODUCTION
LTC4231HMS-1#TRPBF	PRODUCTION
LTC4231HMS-1#WPBF	PRODUCTION
LTC4231HMS-1#WTRPBF	PRODUCTION
LTC4231HMS-2#PBF	PRODUCTION
LTC4231HMS-2#TRPBF	PRODUCTION
LTC4231HMS-2#WPBF	PRODUCTION
LTC4231HMS-2#WTRPBF	PRODUCTION
LTC4231IMS-1#PBF	PRODUCTION
LTC4231IMS-1#TRPBF	PRODUCTION
LTC4231IMS-1#WPBF	PRODUCTION
LTC4231IMS-1#WTRPBF	PRODUCTION
LTC4231IMS-2#PBF	PRODUCTION
LTC4231IMS-2#TRPBF	PRODUCTION
LTC4231IMS-2#WPBF	PRODUCTION
LTC4231IMS-2#WTRPBF	PRODUCTION
Apr 17, 2025 - 25_0043 Change of Gold to Copper Wire and BOM (Automotive)
		PCN25_0043_Form Material_Report Delta Qualification Matrix Qualification Results Summary
LTC4231CUD-1#PBF	PRODUCTION
LTC4231CUD-1#TRPBF	PRODUCTION
LTC4231CUD-2#PBF	PRODUCTION
LTC4231CUD-2#TRPBF	PRODUCTION
LTC4231HUD-1#PBF	PRODUCTION
LTC4231HUD-1#TRPBF	PRODUCTION
Oct 11, 2022 - 22_0244 Epoxy Change from Henkel 8290 to 8290A for MSOP Package
		PCN22_0244_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LTC4231HMS-1#WPBF	PRODUCTION
LTC4231HMS-1#WTRPBF	PRODUCTION
LTC4231HMS-2#WPBF	PRODUCTION
LTC4231HMS-2#WTRPBF	PRODUCTION
LTC4231IMS-1#WPBF	PRODUCTION
LTC4231IMS-1#WTRPBF	PRODUCTION
LTC4231IMS-2#WPBF	PRODUCTION
LTC4231IMS-2#WTRPBF	PRODUCTION
Jul 12, 2022 - 22_0157 UTAC Thai Limited (UTL) as Alternate Assembly Site for MSOP Packages [With Modification in BOM]
		PCN22_0157_Form Material_Report Qualification Results Summary Delta Qualification Matrix Detailed Parts List
LTC4231HMS-1#WPBF	PRODUCTION
LTC4231HMS-1#WTRPBF	PRODUCTION
LTC4231HMS-2#WPBF	PRODUCTION
LTC4231HMS-2#WTRPBF	PRODUCTION
LTC4231IMS-1#WPBF	PRODUCTION
LTC4231IMS-1#WTRPBF	PRODUCTION
LTC4231IMS-2#WPBF	PRODUCTION
LTC4231IMS-2#WTRPBF	PRODUCTION
Jun 21, 2022 - 22_0050 UTAC Thai Limited (UTL) as Alternate Assembly Site for MSOP Packages / Devices
		PCN22_0050_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LTC4231HMS-1#WPBF	PRODUCTION
LTC4231HMS-1#WTRPBF	PRODUCTION
LTC4231HMS-2#WPBF	PRODUCTION
LTC4231HMS-2#WTRPBF	PRODUCTION
LTC4231IMS-1#WPBF	PRODUCTION
LTC4231IMS-1#WTRPBF	PRODUCTION
LTC4231IMS-2#WPBF	PRODUCTION
LTC4231IMS-2#WTRPBF	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Hardware Ecosystem

Parts	Product Life Cycle	Description
High Voltage Hot Swap Controllers 1
LTC4380	RECOMMENDED FOR NEW DESIGNS	Low Quiescent Current Surge Stopper
PowerPath, Ideal Diodes, and Load Switches 2
LTC4359	RECOMMENDED FOR NEW DESIGNS	Ideal Diode Controller with Reverse Input Protection
LTC4417	RECOMMENDED FOR NEW DESIGNS	Prioritized PowerPath^™ Controller

Tools & Simulations

LTspice 1

LTC4231 - Hot Swap Controllers

Models for the following parts are available in LTspice:

LTC4231-1
LTC4231-2

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.

Evaluation Kits

LTC4231IMS-1 Demo Board | Micropower Hot Swap Controller with Latch-Off

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Product Details

Demonstration circuit 2161A showcases the LTC4231 Micropower Hot Swap™ Controller in a 12V, 3A application. Included on the board are input overvoltage and reverse voltage protection, input voltage dividers for UV and OV detection, an output voltage LED, jumpers to disable UV/OV, manual and remote enable control, and quiescent current measurement. There are turrets provided to monitor input voltage, output voltage, output status, quiescent current, several ground connections, timer pin, and control the ON pin. Input, output and return voltages are provided on banana jacks.