LTC4227
RECOMMENDED FOR NEW DESIGNSDual Ideal Diode and Single Hot Swap Controller
- Part Models
- 24
- 1ku List Price
- Starting From $5.17
Overview
- Power Path and Inrush Current Control for Redundant Supplies
- Low Loss Replacement for Power Schottky Diodes
- Allows Safe Hot Swapping from a Live Backplane
- 2.9V to 18V Operating Range
- Controls N-Channel MOSFETs
- Limits Peak Fault Current in ≤1μs
- 0.5μs Ideal Diode Turn-On and Reverse Turn-Off Time
- Adjustable Current Limit with Circuit Breaker
- Smooth Switchover without Oscillation
- Adjustable Current Limit Fault Delay
- Fault and Power Status Output
- 20-Lead 4mm × 5mm QFN and 16-Lead SSOP Packages
The LTC4227 offers ideal diode-OR and Hot Swap™ functions for two power rails by controlling external Nchannel MOSFETs. MOSFETs acting as ideal diodes replace two high power Schottky diodes and the associated heat sinks, saving power and board area. A Hot Swap control MOSFET allows a board to be safely inserted and removed from a live backplane by limiting inrush current. The supply output is also protected against short-circuit faults with a fast acting current limit and internal timed circuit breaker.
The LTC4227 regulates the forward voltage drop across the MOSFETs to ensure smooth current transfer from one supply to the other without oscillation. The ideal diodes turn on quickly to reduce the load voltage droop during supply switchover. If the input supply fails or is shorted, a fast turn-off minimizes reverse-current transients.
The LTC4227 allows turn-on/off control, and reports fault and power good status for the supply.
| Part | Overcurrent Fault | Start-Up Delay |
| LTC4227-1 | Latch Off | 100ms |
| LTC4227-2 | Retry | 100ms |
| LTC4227-3 | Latch Off | 1.6ms |
| LTC4227-4 | Retry | 1.6ms |
Applications
- Redundant Power Supplies and Supply Holdup
- Computer Systems and Servers
- Telecom Networks
Documentation
Data Sheet 1
User Guide 1
Technical Articles 1
Product Selector Card 1
Product Selection Guide 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 Models | Product Lifecycle | PCN |
|---|---|---|
|
Oct 3, 2024 - 24_0235 (QSOP/SSOP PKG) Migrating Bottom Trace Code Marking to Top Side Laser Marking |
||
| LTC4227CGN-1#PBF | PRODUCTION | |
| LTC4227CGN-1#TRPBF | PRODUCTION | |
| LTC4227CGN-2#PBF | PRODUCTION | |
| LTC4227CGN-2#TRPBF | PRODUCTION | |
| LTC4227IGN-1#PBF | PRODUCTION | |
| LTC4227IGN-1#TRPBF | PRODUCTION | |
| LTC4227IGN-2#PBF | PRODUCTION | |
| LTC4227IGN-2#TRPBF | PRODUCTION | |
|
Oct 11, 2022 - 22_0235 Epoxy Change from Henkel 8290 to 8290A for GN Package |
||
| LTC4227CGN-1#PBF | PRODUCTION | |
| LTC4227CGN-1#TRPBF | PRODUCTION | |
| LTC4227CGN-2#PBF | PRODUCTION | |
| LTC4227CGN-2#TRPBF | PRODUCTION | |
| LTC4227IGN-1#PBF | PRODUCTION | |
| LTC4227IGN-1#TRPBF | PRODUCTION | |
| LTC4227IGN-2#PBF | PRODUCTION | |
| LTC4227IGN-2#TRPBF | PRODUCTION | |
|
Apr 6, 2022 - 22_0066 Laser Top Mark for 16QSOP Assembled in ADPG [PNG] |
||
| LTC4227CGN-1#PBF | PRODUCTION | |
| LTC4227CGN-1#TRPBF | PRODUCTION | |
| LTC4227CGN-2#PBF | PRODUCTION | |
| LTC4227CGN-2#TRPBF | PRODUCTION | |
| LTC4227IGN-1#PBF | PRODUCTION | |
| LTC4227IGN-1#TRPBF | PRODUCTION | |
| LTC4227IGN-2#PBF | PRODUCTION | |
| LTC4227IGN-2#TRPBF | PRODUCTION | |
|
Feb 14, 2025 - 25_0016 Bond Wire Change from Gold to Copper Wire (Notification Only) |
||
| LTC4227CUFD-1#PBF | PRODUCTION | |
| LTC4227CUFD-1#TRPBF | PRODUCTION | |
| LTC4227CUFD-2#PBF | PRODUCTION | |
| LTC4227CUFD-2#TRPBF | PRODUCTION | |
| LTC4227CUFD-3#PBF | PRODUCTION | |
| LTC4227CUFD-3#TRPBF | PRODUCTION | |
| LTC4227CUFD-4#PBF | PRODUCTION | |
| LTC4227CUFD-4#TRPBF | PRODUCTION | |
| LTC4227IUFD-1#PBF | PRODUCTION | |
| LTC4227IUFD-1#TRPBF | PRODUCTION | |
| LTC4227IUFD-2#PBF | PRODUCTION | |
| LTC4227IUFD-2#TRPBF | PRODUCTION | |
| LTC4227IUFD-4#PBF | PRODUCTION | |
| LTC4227IUFD-4#TRPBF | PRODUCTION | |
|
Apr 9, 2025 - 25_0016 Bond Wire Change from Gold to Copper Wire (Notification Only) |
||
| LTC4227IUFD-3#PBF | PRODUCTION | |
| LTC4227IUFD-3#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
| Parts | Product Life Cycle | Description |
|---|---|---|
| Hot Swap Controllers 2 | ||
| LTC4229 | RECOMMENDED FOR NEW DESIGNS | Ideal Diode and Hot Swap Controller |
|
LTC4228-1 LTC4228-2 |
Dual Ideal Diode and Hot Swap Controller | |
| Ideal Diodes and PowerPath Controllers 1 | ||
| LTC4370 | RECOMMENDED FOR NEW DESIGNS | Two-Supply Diode-OR Current Balancing Controller |
| Parts | Product Life Cycle | Description |
|---|---|---|
| LTC4235 | RECOMMENDED FOR NEW DESIGNS | Dual 12V Ideal Diode-OR and Single Hot Swap Controller with Current Monitor |
Tools & Simulations
LTspice
Models for the following parts are available in LTspice:
- LTC4227-1
- LTC4227-2
- LTC4227-3
- LTC4227-4
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
LTC4227CUFD-1 Demo Board: Dual Ideal Diode and Single Hot Swap Controller with Fault Latch-Off and 100ms On Delay
Resources
LTC4227CUFD-2 Demo Board: Dual Ideal Diode and Single Hot Swap Controller with Fault Auto-Retry and 100ms On Delay
Resources
LTC4227CUFD-3 Demo Board: Dual Ideal Diode and Single Hot Swap Controller with Fault Latch-Off and 1.6ms On Delay
Resources
LTC4227CUFD-4 Demo Board: Dual Ideal Diode and Single Hot Swap Controller with Fault Auto-Retry and 1.6ms On Delay