LT1641
PRODUCTIONPositive High Voltage Hot Swap Controller
- Part Models
- 4
- 1ku List Price
- Starting From $4.31
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
Documentation
Data Sheet 1
Design Note 1
Technical Articles 2
Product Selector Card 1
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) | ||
| LT1641CS8#TRPBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LT1641IS8#PBF | 8-Lead SOIC (Narrow 0.15 Inch) | ||
| LT1641IS8#TRPBF | 8-Lead SOIC (Narrow 0.15 Inch) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Oct 24, 2024 - 24_0246 Migrating Bottom Trace Code Marking to Top Side Laser Marking for SOIC_N Package |
||
| 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) |
||
| 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 |
||
| 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
Can't find the software or driver you need?
Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Hot Swap Controllers 1 | ||
| LT4256-1 LT4256-2 | Positive High Voltage Hot Swap Controllers | |
| Parts | Product Life Cycle | Description |
|---|---|---|
| LTC4238 | Obsolete |
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.