LT1641

PRODUCTION

Positive High Voltage Hot Swap Controller

Part Models: 4
1ku List Price: Starting From $3.40

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Overview

Allows Safe Board Insertion and Removal from a Live Backplane
Controls Supply Voltage from 9V to 80V
Programmable Analog Foldback Current Limiting
High Side Drive for an External N-Channel
Automatic Retry Capability
User Programmable Supply Voltage Power-Up Rate
Undervoltage Lockout
Overvoltage Protection
Available in 8-Lead SO Package

The LT1641 is an 8-pin Hot Swap^™ controller that allows a board to be safely inserted and removed from a live backplane. Using an external N-channel pass transistor, the board supply voltage can be ramped up at a programmable rate. A high side switch driver controls an N-channel gate for supply voltages ranging from 9V to 80V.

The chip features a programmable analog foldback current limit circuit. If the chip remains in current limit for more than a programmable time, the N-channel pass transistor turns off and is optionally set to automatically restart after a time-out delay.

The PWRGD output indicates when the output voltage, sensed by the FB pin, is within tolerance. The ON pin provides programmable undervoltage lockout.

The LT1641-1/LT1641-2 are recommended for new designs.

The LT1641 is available in the 8-lead SO package.

Applications

Hot Board Insertion
Electronic Circuit Breaker
Industrial High Side Switch/Circuit Breaker
24V/48V Industrial/Alarm Systems

Part Models: 4
1ku List Price: Starting From $3.40

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
LT1641CS8#PBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1641CS8#TRPBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1641IS8#PBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1641IS8#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
LT1641CS8#PBF	PRODUCTION
LT1641CS8#TRPBF	PRODUCTION
LT1641IS8#PBF	PRODUCTION
LT1641IS8#TRPBF	PRODUCTION
Oct 12, 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
LT1641CS8#PBF	PRODUCTION
LT1641CS8#TRPBF	PRODUCTION
LT1641IS8#PBF	PRODUCTION
LT1641IS8#TRPBF	PRODUCTION
Jun 11, 2021 - 21_0060 Laser Top Mark for 8SOICN Assembled in ADPG, UTL and CRM
		PCN21_0060_Form Material_Report Delta Qualification Matrix
LT1641CS8#PBF	PRODUCTION
LT1641CS8#TRPBF	PRODUCTION
LT1641IS8#PBF	PRODUCTION
LT1641IS8#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 1
LT4256-1 LT4256-2		Positive High Voltage Hot Swap Controllers

Parts	Product Life Cycle	Description
LTC4238	LAST TIME BUY	High Voltage High Current Hot Swap Controller

Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

LT1641-1
LT1641-2

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.

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LT1641

Overview

Documentation

Data Sheet 1

Reliability Data 1

Design Note 1

Technical Articles 2

Product Selector Card 1