LT4256-3
Info : RECOMMENDED FOR NEW DESIGNS
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LT4256-3

Positive High Voltage Hot Swap Controller with Open-Circuit Detect

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LTspice LT4256-3 - Hot Swap Controllers Download 3.64 KB
Part Models 4
1ku List Price Starting From $2.81
Features
  • Allows Safe Board Insertion and Removal from a Live Backplane
  • Controls Supply Voltage from 10.8V to 80V
  • Foldback Current Limiting
  • Open Circuit and Overcurrent Fault Detect
  • Drives an External N-Channel MOSFET
  • Automatic Retry or Latched Off Operation After Overcurrent Fault
  • Programmable Supply Voltage Power-Up Rate
  • Open MOSFET Detection
  • 1% Over and Undervoltage Detection Accuracy
  • Available in a 16-Lead SSOP Package
Additional Details
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The LT4256-3 is a high voltage Hot Swap™ controller that allows a board to be safely inserted and removed from a live backplane. An internal driver controls the high side N-channel MOSFET gate for supply voltages ranging from 10.8V to 80V. The part features an open-circuit detect (OPEN) output that indicates abnormally low load current conditions.

The LT4256-3 also features an adjustable analog foldback current limit. If the supply remains in current limit for more than a programmable time, the N-channel MOSFET shuts off, the PWRGD output asserts low and the LT4256-3 either automatically restarts after a time-out delay or latches off until the UV pin is cycled low (depending on the status of the RETRY pin).

The PWRGD output indicates when the output voltage rises above a programmed level. An external resistor string from VCC provides programmable undervoltage and overvoltage protection.

The LT4256-3 is available in a 16-lead SSOP package.

Retry / Latch Off Features Package
LT4256-1 Latch Off UV SO-8
LT4256-2 Retry UV SO-8
LT4256-3 Latch Off or Retry UV/OV, Open Circuit Detect SSOP-16

Applications

  • Hot Board Insertion
  • Electronic Circuit Breaker/Power Bussing
  • Industrial High Side Switch/Circuit Breaker
  • 24V/48V Industrial/Alarm Systems
  • Ideally Suited for 12V, 24V and 48V Distributed Power Systems
  • 48V Telecom Systems
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file View Data Sheet
Documentation View All Documentation
LTspice LT4256-3 - Hot Swap Controllers Download 3.64 KB
Part Models 4
1ku List Price Starting From $2.81
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LT4256-3

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Data Sheet

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UPDATED 08/28/2007
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LT4256-3: Positive High Voltage Hot Swap Controller with Open-Circuit Detect Data Sheet

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UPDATED 12/09/2009
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LT4256-3: 開放検出機能付き、正の高電圧ホットスワップ・コントローラ データシート

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User Guide

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UPDATED 01/06/2014
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Documentation

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
LT4256-3CGN#PBF 16-Lead SSOP (Narrow 0.15 Inch) external-link
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LT4256-3CGN#TRPBF 16-Lead SSOP (Narrow 0.15 Inch) external-link
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LT4256-3IGN#PBF 16-Lead SSOP (Narrow 0.15 Inch) external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LT4256-3IGN#TRPBF 16-Lead SSOP (Narrow 0.15 Inch) external-link
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  • Material Declaration external-link
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Oct 3, 2024

- 24_0235

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(QSOP/SSOP PKG) Migrating Bottom Trace Code Marking to Top Side Laser Marking

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Apr 6, 2022

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Software & Part Ecosystem

Parts Product Life Cycle Description

High Voltage Hot Swap Controllers1
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DC684A

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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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