LTC4229
RECOMMENDED FOR NEW DESIGNSIdeal Diode and Hot Swap Controller
- Part Models
- 8
- 1ku List Price
- Starting From $4.48
Overview
- Ideal Diode and Inrush Current Control for Redundant Supplies
- Low Loss Replacement for Power Schottky Diode
- Protects Output Voltage from Input Brownouts
- Allows Safe Hot Swapping from a Live Backplane
- 2.9V to 18V Operating Range
- Controls Back-to-Back N-Channel MOSFETs
- Limits Peak Fault Current in ≤1μs
- Adjustable Current Limit with Foldback
- Adjustable Start-Up and Current Limit Fault Delay
- 0.5μs Ideal Diode Turn-On and Turn-Off Time
- Undervoltage and Overvoltage Protection
- Status, Fault and Power Good Outputs
- Pin Selectable Latch Off or Automatic Retry After Fault
- 24-Lead 4mm × 5mm QFN and SSOP Packages
The LTC4229 offers ideal diode and Hot Swap™ functions for a power rail by controlling two external N-channel MOSFETs. The MOSFET acting as an ideal diode replaces a high power Schottky diode and the associated heat sink, saving power and board area. The Hot Swap MOSFET control 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 foldback current limit and electronic circuit breaker.
The LTC4229 regulates the forward voltage drop across the external MOSFET to ensure smooth current transfer in diode-OR applications. The ideal diode turns 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 LTC4229 provides adjustable start-up delay, undervoltage and overvoltage protection, and reports fault and power good status for the supply. It can be configured for latch off or automatic retry after a fault.
Applications
- Redundant Power Supplies
- Supply Holdup
- High Availability Systems and Servers
- Telecom and Network Infrastructure
- Power Prioritizer
Documentation
Data Sheet 1
User Guide 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 Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LTC4229CG#PBF | 24-Lead SSOP | ||
| LTC4229CG#TRPBF | 24-Lead SSOP | ||
| LTC4229CUFD#PBF | 24-Lead QFN (4mm x 5mm x 0.75mm w/ EP) | ||
| LTC4229CUFD#TRPBF | 24-Lead QFN (4mm x 5mm x 0.75mm w/ EP) | ||
| LTC4229IG#PBF | 24-Lead SSOP | ||
| LTC4229IG#TRPBF | 24-Lead SSOP | ||
| LTC4229IUFD#PBF | 24-Lead QFN (4mm x 5mm x 0.75mm w/ EP) | ||
| LTC4229IUFD#TRPBF | 24-Lead QFN (4mm x 5mm x 0.75mm w/ EP) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Aug 6, 2022 - 22_0171 Laser Top Mark Conversion for SSOP Packages Assembled in PNG |
||
| LTC4229CG#PBF | PRODUCTION | |
| LTC4229CG#TRPBF | PRODUCTION | |
| LTC4229IG#PBF | PRODUCTION | |
| LTC4229IG#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 2 | ||
|
LTC4228-1 LTC4228-2 |
Dual Ideal Diode and Hot Swap Controller | |
| LTC4227 | RECOMMENDED FOR NEW DESIGNS | Dual Ideal Diode and Single Hot Swap Controller |
Tools & Simulations
LTspice
Models for the following parts are available in LTspice:
- LTC4229
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
LTC4229IUFD Demo Board: Single Ideal Diode and Hot Swap Controller
Resources
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