LTC4236
RECOMMENDED FOR NEW DESIGNSDual Ideal Diode-OR and Single Hot Swap Controller with Current Monitor
- Part Models
- 8
- 1ku List Price
- Starting From $6.42
Overview
- Ideal Diode-OR and Inrush Current Control for Redundant Supplies
- Low Loss Replacement for Power Schottky Diodes
- Enables Safe Board Insertion into a Live Backplane
- 2.9V to 18V Operating Range
- Current Monitor Output
- Controls 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
- Smooth Switchover without Oscillation
- Fault, Power Good and Diode Status Outputs
- LTC4236-1: Latch Off After Fault
- LTC4236-2: Automatic Retry After Fault
- 28-Pin 4mm x 5mm QFN Package
The LTC4236 offers ideal diode-OR and Hot Swap functions for two power rails by controlling external N-channel 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 foldback current limit and electronic circuit breaker.
The LTC4236 regulates the forward voltage drop across the ideal diode MOSFETs to ensure smooth current transfer from one supply to the other without oscillation. The ideal diode MOSFETs 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.
A current sense amplifier translates the voltage across the sense resistor to a ground referenced signal. The LTC4236 provides adjustable start-up delay, turn-on/-off control, and reports fault and power good status for the supply.
Applications
- Redundant Power Supplies
- High Availability Systems and Servers
- Telecom and Network Infrastructure
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 |
|---|---|---|---|
| LTC4236CUFD-1#PBF | 28-Lead QFN (4mm x 5mm x 0.75mm w/ EP) | ||
| LTC4236CUFD-1#TRPBF | 28-Lead QFN (4mm x 5mm x 0.75mm w/ EP) | ||
| LTC4236CUFD-2#PBF | 28-Lead QFN (4mm x 5mm x 0.75mm w/ EP) | ||
| LTC4236CUFD-2#TRPBF | 28-Lead QFN (4mm x 5mm x 0.75mm w/ EP) | ||
| LTC4236IUFD-1#PBF | 28-Lead QFN (4mm x 5mm x 0.75mm w/ EP) | ||
| LTC4236IUFD-1#TRPBF | 28-Lead QFN (4mm x 5mm x 0.75mm w/ EP) | ||
| LTC4236IUFD-2#PBF | 28-Lead QFN (4mm x 5mm x 0.75mm w/ EP) | ||
| LTC4236IUFD-2#TRPBF | 28-Lead QFN (4mm x 5mm x 0.75mm w/ EP) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Jan 20, 2022 - 21_0269 Addition of Alternate Assembly Site ASE Taiwan for Select LFCSP Products |
||
| LTC4236CUFD-1#PBF | PRODUCTION | |
| LTC4236CUFD-1#TRPBF | PRODUCTION | |
| LTC4236CUFD-2#PBF | PRODUCTION | |
| LTC4236CUFD-2#TRPBF | PRODUCTION | |
| LTC4236IUFD-1#PBF | PRODUCTION | |
| LTC4236IUFD-1#TRPBF | PRODUCTION | |
| LTC4236IUFD-2#PBF | PRODUCTION | |
| LTC4236IUFD-2#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 |
|---|---|---|
|
LTC4228-1 LTC4228-2 |
RECOMMENDED FOR NEW DESIGNS | Dual Ideal Diode and Hot Swap Controller |
| 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:
- LTC4236-1
- LTC4236-2
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.
