LT4250
Info : RECOMMENDED FOR NEW DESIGNS
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LT4250

Negative 48V Hot Swap Controller

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 12
1ku List Price Starting From $2.71
Features
  • Allows Safe Board Insertion and Removal from a Live –48V Backplane
  • Circuit Breaker Immunity to Voltage Steps and Current Spikes
  • Programmable Inrush and Short-Circuit Current Limits
  • Pin Compatible with LT1640L/LT1640H
  • Operates from –18V to –80V
  • Programmable Overvoltage Protection
  • Programmable Undervoltage Lockout
  • Power Good Control Output
  • Bell-Core Compatible ON/OFF Threshold
Additional Details
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The LT4250L/LT4250H are 8-pin, negative 48V Hot Swap controllers that allow a board to be safely inserted and removed from a live backplane. Inrush current is limited to a programmable value by controlling the gate voltage of an external N-channel pass transistor. The pass transistor is turned off if the input voltage is less than the programmable undervoltage threshold or greater than the overvoltage threshold. A programmable current limit protects the system against shorts. After a 500μs timeout the current limit activates the electronic circuit breaker. The PWRGD (LT4250L) or PWRGD (LT4250H) signal can be used to directly enable a power module. The LT4250L is designed for modules with a low enable input and the LT4250H for modules with a high enable input.

The LT4250L/LT4250H are available in 8-pin PDIP and SO packages

Applications

  • Central Office Switching
  • –48V Distributed Power Systems
  • Negative Power Supply Control
Part Models 12
1ku List Price Starting From $2.71

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
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Product Lifecycle

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Oct 11, 2022

- 22_0241

Epoxy Change from Henkel 8290 to 8290A for PDIP Package

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Aug 6, 2022

- 22_0172

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Oct 12, 2022

- 22_0255

Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 2 of 2)

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Jun 16, 2021

- 21_0026

Laser Top Mark for 8SOICN Assembled in ADPG, UTL and CRM

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Part Models

Product Lifecycle

PCN

Oct 11, 2022

- 22_0241

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Epoxy Change from Henkel 8290 to 8290A for PDIP Package

LT4250HCN8#PBF

PRODUCTION

LT4250HIN8#PBF

PRODUCTION

LT4250LCN8#PBF

PRODUCTION

LT4250LIN8#PBF

PRODUCTION

Aug 6, 2022

- 22_0172

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Laser Top Mark Conversion for PDIP Packages Assembled in ADPG [PNG]

LT4250HCN8#PBF

PRODUCTION

LT4250HIN8#PBF

PRODUCTION

LT4250LCN8#PBF

PRODUCTION

LT4250LIN8#PBF

PRODUCTION

Oct 12, 2022

- 22_0255

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Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 2 of 2)

LT4250HCS8#PBF

PRODUCTION

LT4250HCS8#TRPBF

PRODUCTION

LT4250HIS8#PBF

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LT4250HIS8#TRPBF

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LT4250LCS8#TRPBF

PRODUCTION

LT4250LIS8#PBF

PRODUCTION

LT4250LIS8#TRPBF

PRODUCTION

Jun 16, 2021

- 21_0026

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Laser Top Mark for 8SOICN Assembled in ADPG, UTL and CRM

LT4250HCS8#PBF

PRODUCTION

LT4250HCS8#TRPBF

PRODUCTION

LT4250HIS8#PBF

PRODUCTION

LT4250HIS8#TRPBF

PRODUCTION

LT4250LCS8#PBF

PRODUCTION

LT4250LCS8#TRPBF

PRODUCTION

LT4250LIS8#PBF

PRODUCTION

LT4250LIS8#TRPBF

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

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.

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