LTC1645

PRODUCTION

Dual-Channel Hot Swap Controller/Power Sequencer

Part Models: 8
1ku List Price: Starting From $4.26

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Overview

Allows Safe Board Insertion and Removal from a Live Backplane
Programmable Power Supply Sequencing
Programmable Electronic Circuit Breaker
User-Programmable Supply Voltage Power-Up and Power-Down Rate
High Side Drivers for External N-Channel FETs
Controls Supply Voltages from 1.2V to 12V
Ensures Proper Power-Up Behavior
Undervoltage Lockout
Glitch Filter Protects Against Spurious RESET Signals
8- and 14-Pin SO Packages

The LTC1645 is a 2-channel Hot Swap^™ controller that allows a board to be safely inserted and removed from a live backplane. Using external N-channel pass transistors, the supply voltages can be ramped at a programmable rate. Two high side switch drivers control the N-channel gates for supply voltages ranging from 1.2V to 12V. The two channels can be set to ramp up and down separately, or they can be programmed to rise and fall simultaneously, ensuring power supply tracking at the two outputs.

Programmable electronic circuit breakers protect against shorts at either output. The RESET output can be used to generate a system reset when a supply voltage falls below a user-programmed voltage. An additional spare comparator is available for monitoring a second supply voltage.

The LTC1645 is available in the 8- and 14-pin SO packages.

Applications

Hot Board Insertion
Power Supply Sequencing
Electronic Circuit Breaker

Part Models: 8
1ku List Price: Starting From $4.26

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
LTC1645CS#PBF	14-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1645CS#TRPBF	14-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1645CS8#PBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1645CS8#TRPBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1645IS#PBF	14-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1645IS#TRPBF	14-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1645IS8#PBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1645IS8#TRPBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Oct 24, 2024 - 24_0246 Migrating Bottom Trace Code Marking to Top Side Laser Marking for SOIC_N Package
		PCN24_0246_Form Material_Report Marking Comparison Delta Qualification Matrix
LTC1645CS#PBF	PRODUCTION
LTC1645CS#TRPBF	PRODUCTION
LTC1645IS#PBF	PRODUCTION
LTC1645IS#TRPBF	PRODUCTION
Oct 12, 2022 - 22_0251 Epoxy Change from Henkel 8290 to 8290A for 14-Lead SOIC Package
		PCN22_0251_Form Material_Report Qualification Results Summary
LTC1645CS#PBF	PRODUCTION
LTC1645CS#TRPBF	PRODUCTION
LTC1645IS#PBF	PRODUCTION
LTC1645IS#TRPBF	PRODUCTION
Aug 6, 2022 - 22_0173 Laser Top Mark Conversion for SOICN14 and SOICN16 Packages Assembled on ADPG [PNG]
		PCN22_0173_Form Material_Report Delta Qualification Matrix
LTC1645CS#PBF	PRODUCTION
LTC1645CS#TRPBF	PRODUCTION
LTC1645IS#PBF	PRODUCTION
LTC1645IS#TRPBF	PRODUCTION
Nov 14, 2022 - 22_0254 Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 1 of 2)
		PCN22_0254_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LTC1645CS8#PBF	PRODUCTION
LTC1645CS8#TRPBF	PRODUCTION
Jun 16, 2021 - 21_0026 Laser Top Mark for 8SOICN Assembled in ADPG, UTL and CRM
		PCN21_0026_Form Material_Report Delta Qualification Matrix
LTC1645CS8#PBF	PRODUCTION
LTC1645CS8#TRPBF	PRODUCTION
LTC1645IS8#PBF	PRODUCTION
LTC1645IS8#TRPBF	PRODUCTION
Dec 14, 2023 - 22_0255 Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 2 of 2)
		PCN22_0255_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LTC1645IS8#PBF	PRODUCTION
LTC1645IS8#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

Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

LTC1645

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

LTC1645CS8 Demo Board | 2-Supply Hot Swap Controller and Sequencer [5V/5A, 3.3V/7A]

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Product Details

Demonstration circuit 1356A is a dual Hot Swap circuit featuring the LTC1645 dual-channel hot swap controller/power sequencer.

Resources

DC1356A - Design Files
11/23/2016

DC1356A - Demo Manual
11/23/2016

DC1356A - Schematic
11/23/2016

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LTC1645

Overview

Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Design Note 4

Technical Articles 2

Product Selector Card 1