LTC1421

PRODUCTION

Hot Swap Controller

Part Models: 16
1ku List Price: Starting From $6.15

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Overview

Allows Safe Board Insertion and Removal from a Live Backplane
System Reset and Power Good Control Outputs
Programmable Electronic Circuit Breaker
User Programmable Supply Voltage Power-Up Rate
High Side Driver for Two External N-Channels
Controls Supply Voltages from 3V to 12V
Connection Inputs Detect Board Insertion or Removal
Undervoltage Lockout
Power-On Reset Input

The LTC1421/LTC1421-2.5 are Hot Swap^™ controllers that allow a board to be safely inserted and removed from a live backplane. Using external N-channel pass transistors, the board supply voltages can be ramped up at a programmable rate. Two high side switch drivers control the N-channel gates for supply voltages ranging from 3V to 12V.

A programmable electronic circuit breaker protects against shorts. Warning signals indicate that the circuit breaker has tripped, a power failure has occurred or that the switch drivers are turned off. The reset output can be used to generate a system reset when the power cycles or a fault occurs. The two connect inputs can be used with staggered connector pins to indicate board insertion or removal. The power-on reset input can be used to cycle the board power or clear the circuit breaker.

The trip point of the ground sense comparator is set at 0.1V for LTC1421 and 2.5V for LTC1421-2.5.

The LTC1421/LTC1421-2.5 are available in 24-pin SO and SSOP packages.

Applications

Hot Board Insertion
Electronic Circuit Breaker

Part Models: 16
1ku List Price: Starting From $6.15

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
LTC1421CG#PBF	24-Lead SSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1421CG#TRPBF	24-Lead SSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1421CG-2.5#PBF	24-Lead SSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1421CG-2.5#TRPBF	24-Lead SSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1421CSW#PBF	24-Lead SOIC (Wide 0.3 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1421CSW#TRPBF	24-Lead SOIC (Wide 0.3 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1421CSW-2.5#PBF	24-Lead SOIC (Wide 0.3 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1421CSW-2.5#TRPBF	24-Lead SOIC (Wide 0.3 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1421IG#PBF	24-Lead SSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1421IG#TRPBF	24-Lead SSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1421IG-2.5#PBF	24-Lead SSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1421IG-2.5#TRPBF	24-Lead SSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1421ISW#PBF	24-Lead SOIC (Wide 0.3 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1421ISW#TRPBF	24-Lead SOIC (Wide 0.3 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1421ISW-2.5#PBF	24-Lead SOIC (Wide 0.3 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1421ISW-2.5#TRPBF	24-Lead SOIC (Wide 0.3 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Aug 6, 2022 - 22_0171 Laser Top Mark Conversion for SSOP Packages Assembled in PNG
		PCN22_0171_Form Material_Report Delta Qualification Matrix
LTC1421CG#PBF	PRODUCTION
LTC1421CG#TRPBF	PRODUCTION
LTC1421CG-2.5#PBF	PRODUCTION
LTC1421CG-2.5#TRPBF	PRODUCTION
LTC1421IG#PBF	PRODUCTION
LTC1421IG#TRPBF	PRODUCTION
LTC1421IG-2.5#PBF	PRODUCTION
LTC1421IG-2.5#TRPBF	PRODUCTION
Oct 3, 2024 - 24_0235 (QSOP/SSOP PKG) Migrating Bottom Trace Code Marking to Top Side Laser Marking
		PCN24_0235_Form Material_Report Other Delta Qualification Matrix
LTC1421CG-2.5#PBF	PRODUCTION
LTC1421CG-2.5#TRPBF	PRODUCTION
LTC1421IG-2.5#PBF	PRODUCTION
LTC1421IG-2.5#TRPBF	PRODUCTION
Aug 10, 2022 - 22_0176 Laser Top Mark Conversion for SOIC_W Packages Assembled in ADPG [PNG] and UTL
		PCN22_0176_Form Material_Report Delta Qualification Matrix
LTC1421CSW#PBF	PRODUCTION
LTC1421CSW#TRPBF	PRODUCTION
LTC1421CSW-2.5#PBF	PRODUCTION
LTC1421CSW-2.5#TRPBF	PRODUCTION
LTC1421ISW#PBF	PRODUCTION
LTC1421ISW#TRPBF	PRODUCTION
LTC1421ISW-2.5#PBF	PRODUCTION
LTC1421ISW-2.5#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
LTC4221	RECOMMENDED FOR NEW DESIGNS	Dual Hot Swap Controller/Power Sequencer with Dual Speed, Dual Level Fault Protection
LTC4226	PRODUCTION	Wide Operating Range Dual Hot Swap Controller