LTC4253B
Info : RECOMMENDED FOR NEW DESIGNS
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LTC4253B

–48V Hot Swap Controller with Sequencer

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
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Part Models 4
1ku List Price Starting From $3.22
Features
  • Allows Safe Board Insertion and Removal from a Live –48V Backplane
  • Floating Topology Permits Very High Voltage Operation
  • Adjustable Analog Current Limit with Breaker Timer Ideal for Two Battery Feeds
  • Fast Response Time Limits Peak Fault Current
  • Three Sequenced Power Good Outputs
  • Improved Ruggedness Shunt Regulator
  • Adjustable Soft-Start Current Limit
  • Adjustable Timer with Drain Voltage Accelerated Response
  • Latchoff After Fault
  • Available in a 16-Pin SSOP Package
Additional Details
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The LTC4253B negative voltage Hot Swap™ controller allows a board to be safely inserted and removed from a live backplane. Output current is controlled by three stages of current-limiting: a timed circuit breaker, active current limiting and a fast feedforward path that limits peak current under worst-case catastrophic fault conditions. The LTC4253B latches off after a circuit fault.

Adjustable undervoltage and overvoltage detectors disconnect the load whenever the input supply exceeds the desired operating range. The LTC4253B’s supply input is shunt-regulated, allowing safe operation with very high supply voltages. A multifunction timer delays initial start-up and controls the circuit breaker’s response time. The circuit breaker’s response time can be accelerated by sensing excessive MOSFET drain voltage, keeping the MOSFET within its safe operating area (SOA). An adjustable softstart circuit controls MOSFET inrush current at start-up.

Three power good outputs are sequenced by an adjustable timer and two ENABLE inputs to enable external power modules at start-up or disable them if the circuit breaker trips. The LTC4253B improves the ruggedness of the LTC4253 shunt regulator.

Notes
LTC4253
LTC4253A Recommend LTC4253B for new designs
LTC4253A-ADJ Recommend LTC4253B for new designs
LTC4253B

Applications

  • –48V Distributed Power Systems
  • Negative Power Supply Control
  • Central Office Switching
  • High Availability Servers
  • Disk Arrays

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Part Models 4
1ku List Price Starting From $3.22
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LTC4253B

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Data Sheet

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UPDATED 01/30/2012
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LTC4253B: –48V Hot Swap Controller with Sequencer Data Sheet

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UPDATED 03/16/2012
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LTC4253B: シーケンサ付き –48V Hot Swapコントローラ データシート

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Reliability Data

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UPDATED 03/22/2018
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Documentation

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
LTC4253BCGN#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
LTC4253BCGN#TRPBF 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
LTC4253BIGN#PBF 16-Lead SSOP (Narrow 0.15 Inch) external-link
  • HTML
  • Material Declaration external-link
  • HTML
  • Reliablity Data external-link
LTC4253BIGN#TRPBF 16-Lead SSOP (Narrow 0.15 Inch) external-link
  • HTML
  • Material Declaration external-link
  • HTML
  • Reliablity Data external-link

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PCN

Oct 11, 2022

- 22_0235

Epoxy Change from Henkel 8290 to 8290A for GN Package

LTC4253BCGN#PBF

PRODUCTION

LTC4253BCGN#TRPBF

PRODUCTION

LTC4253BIGN#PBF

PRODUCTION

LTC4253BIGN#TRPBF

PRODUCTION

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PCN22_0235_Form

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Material_Report

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pdf

Qualification Results Summary

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xlsm

Delta Qualification Matrix

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Apr 6, 2022

- 22_0066

Laser Top Mark for 16QSOP Assembled in ADPG [PNG]

LTC4253BCGN#PBF

PRODUCTION

LTC4253BCGN#TRPBF

PRODUCTION

LTC4253BIGN#PBF

PRODUCTION

LTC4253BIGN#TRPBF

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pdf

PCN22_0066_Form

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Material_Report

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Delta Qualification Matrix

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PCN

Oct 11, 2022

- 22_0235

arrow down

Epoxy Change from Henkel 8290 to 8290A for GN Package

LTC4253BCGN#PBF

PRODUCTION

LTC4253BCGN#TRPBF

PRODUCTION

LTC4253BIGN#PBF

PRODUCTION

LTC4253BIGN#TRPBF

PRODUCTION

pdf

PCN22_0235_Form

external-icon

xls

Material_Report

Download

pdf

Qualification Results Summary

external-icon

xlsm

Delta Qualification Matrix

Download
Apr 6, 2022

- 22_0066

arrow down

Laser Top Mark for 16QSOP Assembled in ADPG [PNG]

LTC4253BCGN#PBF

PRODUCTION

LTC4253BCGN#TRPBF

PRODUCTION

LTC4253BIGN#PBF

PRODUCTION

LTC4253BIGN#TRPBF

PRODUCTION

pdf

PCN22_0066_Form

external-icon

xls

Material_Report

Download

xlsm

Delta Qualification Matrix

Download
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