LTC4225-1
LTC4225-2
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LTC4225-1
LTC4225-2

Dual Ideal Diode and Hot Swap Controller

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Part Details
Part Models 16
1ku List Price Starting From $4.30
Features
  • 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 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
  • LTC4225-1: Latch Off After Fault
  • LTC4225-2: Automatic Retry After Fault
  • 24-Lead 4mm × 5mm QFN and SSOP Packages
Additional Details
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The LTC4225 offers ideal diode and Hot Swap functions for two power rails by controlling external series connected N-channel MOSFETs. MOSFETs acting as ideal diodes replace two high power Schottky diodes and the associated heat sinks, saving power and board area. Hot Swap control MOSFETs allow boards 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 LTC4225 regulates the forward voltage drop across the back-to-back 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 switch-over. If the input supply fails or is shorted, a fast turn-off minimizes reverse-current transients.

The LTC4225 allows independent on/off control, and reports fault and power good status for the supply. The LTC4225-1 features a latch-off circuit breaker, while the LTC4225-2 provides automatic retry after a fault.

Applications

  • Redundant Power Supplies
  • Supply Holdup
  • MicroTCA Systems and Servers
  • Telecom Networks
  • Power Prioritizer
Part Models 16
1ku List Price Starting From $4.30

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LTC4225CGN-1#PBF
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LTC4225CGN-1#TRPBF
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LTC4225CGN-2#PBF
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LTC4225CGN-2#TRPBF
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LTC4225CUFD-1#PBF
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LTC4225CUFD-1#TRPBF
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LTC4225CUFD-2#PBF
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LTC4225CUFD-2#TRPBF
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LTC4225IGN-1#PBF
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LTC4225IGN-1#TRPBF
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LTC4225IGN-2#PBF
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LTC4225IGN-2#TRPBF
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LTC4225IUFD-1#PBF
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LTC4225IUFD-1#TRPBF
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LTC4225IUFD-2#PBF
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LTC4225IUFD-2#TRPBF
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Product Lifecycle

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Aug 10, 2022

- 22_0177

Laser Top Mark Conversion for QSOP20_24_28 Assembled in ADPG [PNG] and UTL

LTC4225CGN-1#PBF

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PCN

Aug 10, 2022

- 22_0177

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Laser Top Mark Conversion for QSOP20_24_28 Assembled in ADPG [PNG] and UTL

LTC4225CGN-1#PBF

PRODUCTION

LTC4225CGN-1#TRPBF

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LTC4225CGN-2#PBF

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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 2

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DC1624A-A

LTC4225-1 Dual Ideal Diode and Dual Hot Swap Controller with Latchoff after Fault

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DC1624A-B

DC1624A-B: Demo board for LTC4225-2 Dual Ideal Diode and Dual Hot Swap Controller with Auto-Retry after Fault

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DC1624A-B

DC1624A-B: Demo board for LTC4225-2 Dual Ideal Diode and Dual Hot Swap Controller with Auto-Retry after Fault

DC1624A-B: Demo board for LTC4225-2 Dual Ideal Diode and Dual Hot Swap Controller with Auto-Retry after Fault

Product Detail

DC1624A-B: Demo Board for the LTC4225-1/LTC4225-2 Dual Ideal Diode and Hot Swap Controller.

Tools & Simulations

Tools & Simulations 1

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.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.

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