LTC4226

PRODUCTION

Wide Operating Range Dual Hot Swap Controller

Part Models: 16
1ku List Price: Starting From $3.72

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Overview

Allows Safe Board Insertion into Live Backplane
Selectable Current Limit and Dual-Rate Timer Accommodate Load Surges
Fast Response Limits Peak Fault Current
Wide Operating Voltage Range: 4.5V to 44V
Optional Auto-Retry or Latchoff after Overcurrent Fault
High Side Drive for External N-Channel MOSFET
Allows Parallel Power Paths for High Current Applications
Available in 16-Pin QFN (3mm × 3mm) and MSOP Packages

The LTC4226 dual Hot Swap^™ controller allows two power paths to be safely inserted and removed from a live backplane or powered connector. Using N-channel pass transistors, supply voltages ranging from 4.5V to 44V are ramped up at an adjustable rate.

Three selectable ratios of current limit to circuit breaker threshold accommodate noisy loads and momentary high peak currents without interruption, while a dual-rate fault timer protects the MOSFET from extended output overcurrent events. FAULT outputs indicate the circuit breaker status.The LTC4226-1 remains off after a fault while the LTC4226-2 automatically retries after a 0.5s delay.

The LTC4226 can also be configured as a bidirectional current limiter/circuit breaker. For high current applications, two channels may be configured as parallel power paths.

Applications

Apple FireWire/IEEE 1394
Disk Drives
Rugged 12V, 24V Applications
Hot Board/Connector Insertion
Uni/Bidirectional Current Limiter/Circuit Breaker

Part Models: 16
1ku List Price: Starting From $3.72

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
LTC4226CMS-1#PBF	16-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4226CMS-1#TRPBF	16-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4226CMS-2#PBF	16-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4226CMS-2#TRPBF	16-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4226CUD-1#PBF	16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4226CUD-1#TRPBF	16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4226CUD-2#PBF	16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4226CUD-2#TRPBF	16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4226IMS-1#PBF	16-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4226IMS-1#TRPBF	16-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4226IMS-2#PBF	16-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4226IMS-2#TRPBF	16-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4226IUD-1#PBF	16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4226IUD-1#TRPBF	16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4226IUD-2#PBF	16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC4226IUD-2#TRPBF	16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Feb 14, 2025 - 25_0017 Bond Wire Change from Gold to Copper
		PCN25_0017_Form Material_Report Qualification Results Summary
LTC4226CMS-1#PBF	PRODUCTION
LTC4226CMS-1#TRPBF	PRODUCTION
LTC4226CMS-2#PBF	PRODUCTION
LTC4226CMS-2#TRPBF	PRODUCTION
LTC4226CUD-1#PBF	PRODUCTION
LTC4226CUD-1#TRPBF	PRODUCTION
LTC4226IMS-2#PBF	PRODUCTION
LTC4226IMS-2#TRPBF	PRODUCTION
LTC4226IUD-1#PBF	PRODUCTION
LTC4226IUD-1#TRPBF	PRODUCTION
LTC4226IUD-2#PBF	PRODUCTION
LTC4226IUD-2#TRPBF	PRODUCTION
Jun 5, 2024 - 24_0003 Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2)
		PCN24_0003_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LTC4226CMS-1#PBF	PRODUCTION
LTC4226CMS-1#TRPBF	PRODUCTION
LTC4226CMS-2#PBF	PRODUCTION
LTC4226CMS-2#TRPBF	PRODUCTION
LTC4226IMS-1#PBF	PRODUCTION
LTC4226IMS-1#TRPBF	PRODUCTION
LTC4226IMS-2#PBF	PRODUCTION
LTC4226IMS-2#TRPBF	PRODUCTION
Feb 4, 2020 - 20_0132 Laser Top Mark for 16-Lead MSOP Packages Assembled in ADPG and UTAC
		PCN20_0132_Form Material_Report
LTC4226CMS-1#PBF	PRODUCTION
LTC4226CMS-1#TRPBF	PRODUCTION
LTC4226CMS-2#PBF	PRODUCTION
LTC4226CMS-2#TRPBF	PRODUCTION
LTC4226IMS-1#PBF	PRODUCTION
LTC4226IMS-1#TRPBF	PRODUCTION
LTC4226IMS-2#PBF	PRODUCTION
LTC4226IMS-2#TRPBF	PRODUCTION
Apr 14, 2025 - 25_0017 Bond Wire Change from Gold to Copper
		PCN25_0017_Form Material_Report Qualification Results Summary
LTC4226CUD-2#PBF	PRODUCTION
LTC4226CUD-2#TRPBF	PRODUCTION
LTC4226IMS-1#PBF	PRODUCTION
LTC4226IMS-1#TRPBF	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
Protection Switches & Controllers 2
LTC4222	PRODUCTION	Dual Hot Swap Controller with I²C Compatible Monitoring
LTC4228-1 LTC4228-2		Dual Ideal Diode and Hot Swap Controller

Tools & Simulations

LTspice 1

LTC4226 Demo Circuit - Dual 12V, 7.6A Ideal Diode and Hot Swap Controller for FireWire Application

Models for the following parts are available in LTspice:

LTC4226-1
LTC4226-2

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.