LTC1421
PRODUCTIONHot Swap Controller
- Part Models
- 16
- 1ku List Price
- Starting From $7.78
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
Documentation
Data Sheet 1
User Guide 1
Design Note 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 |
|---|---|---|---|
| LTC1421CG#PBF | 24-Lead SSOP | ||
| LTC1421CG#TRPBF | 24-Lead SSOP | ||
| LTC1421CG-2.5#PBF | 24-Lead SSOP | ||
| LTC1421CG-2.5#TRPBF | 24-Lead SSOP | ||
| LTC1421CSW#PBF | 24-Lead SOIC (Wide 0.3 Inch) | ||
| LTC1421CSW#TRPBF | 24-Lead SOIC (Wide 0.3 Inch) | ||
| LTC1421CSW-2.5#PBF | 24-Lead SOIC (Wide 0.3 Inch) | ||
| LTC1421CSW-2.5#TRPBF | 24-Lead SOIC (Wide 0.3 Inch) | ||
| LTC1421IG#PBF | 24-Lead SSOP | ||
| LTC1421IG#TRPBF | 24-Lead SSOP | ||
| LTC1421IG-2.5#PBF | 24-Lead SSOP | ||
| LTC1421IG-2.5#TRPBF | 24-Lead SSOP | ||
| LTC1421ISW#PBF | 24-Lead SOIC (Wide 0.3 Inch) | ||
| LTC1421ISW#TRPBF | 24-Lead SOIC (Wide 0.3 Inch) | ||
| LTC1421ISW-2.5#PBF | 24-Lead SOIC (Wide 0.3 Inch) | ||
| LTC1421ISW-2.5#TRPBF | 24-Lead SOIC (Wide 0.3 Inch) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Aug 6, 2022 - 22_0171 Laser Top Mark Conversion for SSOP Packages Assembled in PNG |
||
| 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 |
||
| 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 |
||
| 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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Request a Driver/SoftwareHardware Ecosystem
Evaluation Kits
OBSOLETE: LTC1421CSW Demo Board | Two Positive and One Negative Supply Hot Swap Board (Also See DC116A-B)
Resources
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