LT4220
Info : RECOMMENDED FOR NEW DESIGNS
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LT4220

Dual Supply Hot Swap Controller

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 4
1ku List Price Starting From $4.61
Features
  • Hot Swap Controller for Positive and Negative Supplies
  • Supply Tracking Mode
  • ±2.7V to ±16.5V Operation
  • Analog Current Limit with Foldback
  • Allows Safe Board Insertion and Removal from a Live Backplane
  • Open-Collector Power Good Comparators
  • Automatic Retry or Latchoff After a Current Fault
  • Dual Undervoltage Lockout Comparator Inputs
  • Current Fault Indication
Additional Details
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The LT4220 16-pin dual voltage Hot Swap controller allows a board to be safely inserted and removed from a live backplane. The device operates with any combination of 2.7V to 16.5V and –2.7V to –16.5V supplies. Using two external N-channel pass transistors, the board supply voltages can be ramped up at an adjustable rate. A selectable tracking mode allows dual supply tracking control for ramping the positive and negative supplies together.

The LT4220 features foldback current limit and latches off both gates if either supply remains in current limit longer than an adjustable time amount. The IC can be configured for automatic restart after a delay set by the same timer.

A power good signal indicates when the output voltages monitored by the two FB comparators are within tolerance, and the gate drive signals are at their full on voltage.

The LT4220 is available in a 16-lead narrow SSOP package.

Applications

  • Live Board Insertion
  • RAID Systems
  • –5.2V ECL Supplies
  • Industrial Controls
  • Split Supply Systems
Part Models 4
1ku List Price Starting From $4.61

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LT4220CGN#PBF
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LT4220CGN#TRPBF
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LT4220IGN#PBF
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LT4220IGN#TRPBF
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Product Lifecycle

PCN

Oct 11, 2022

- 22_0235

Epoxy Change from Henkel 8290 to 8290A for GN Package

LT4220CGN#PBF

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LT4220CGN#TRPBF

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LT4220IGN#PBF

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PRODUCTION

Apr 6, 2022

- 22_0066

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

LT4220CGN#PBF

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LT4220CGN#TRPBF

PRODUCTION

LT4220IGN#PBF

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Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Oct 11, 2022

- 22_0235

arrow down

Epoxy Change from Henkel 8290 to 8290A for GN Package

LT4220CGN#PBF

PRODUCTION

LT4220CGN#TRPBF

PRODUCTION

LT4220IGN#PBF

PRODUCTION

LT4220IGN#TRPBF

PRODUCTION

Apr 6, 2022

- 22_0066

arrow down

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

LT4220CGN#PBF

PRODUCTION

LT4220CGN#TRPBF

PRODUCTION

LT4220IGN#PBF

PRODUCTION

LT4220IGN#TRPBF

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

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DC665A

LT4220EGN | + / - 12V, 2A Hot Swap Controller with External FETs, VIN = + / - 12V, VOUT = +12V/2a, -12V/2a

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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