LTC4221
Info : RECOMMENDED FOR NEW DESIGNS
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LTC4221

Dual Hot Swap Controller/Power Sequencer with Dual Speed, Dual Level Fault Protection

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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 $4.09
Features
  • Allows Safe Board Insertion and Removal from a Live Backplane
  • Configurable Power Supply Sequencing
  • Soft-Start with Current Foldback Limits Inrush Current
  • No External Gate Capacitor Required
  • Adjustable Dual Level Circuit Breaker Protection
  • Controls Supply Voltages from 1V to 13.5V
  • Independent N-Channel MOSFET High Side Drivers
  • FB Pin Monitors VOUT for Overvoltage Protection
  • Latch Off or Automatic Retry on Current Fault
  • FAULT and PWRGD Outputs
  • Narrow 16-Pin SSOP Package
Additional Details
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The LTC4221 is a 2-channel Hot Swap controller that allows a board to be safely inserted and removed from a live backplane. Using two independent high side gate drivers to control two external N-channel pass transistors, the output voltages can be ramped up with current foldback to limit the inrush current during the start-up period. No external compensation capacitors are required at the GATE pins. The two channels can be configured to ramp up and down separately or simultaneously for supply voltages ranging from 2.7V to 13.5V and 1V to 13.5V for channels 1 and 2 respectively.

Each channel has two current limit comparators that provide dual level and dual speed overcurrent circuit breaker protection after the start-up period. If any current sense voltage exceeds 100mV for 1µs or 25mV for the timeout delay (set by the CFILTER at the FILTER pin), then the FAULT latch is set and both GATE pins are pulled low.

The FB pins monitor the respective channel output voltages and provide the inputs for the PWRGD comparators as well as overvoltage protection.

Applications

  • Electronic Circuit Breaker
  • Power Supply Sequencing
  • Live Board Insertion and Removal
  • Industrial High Side Switch/Circuit Breaker
Part Models 4
1ku List Price Starting From $4.09

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LTC4221CGN#PBF
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LTC4221CGN#TRPBF
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LTC4221IGN#PBF
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LTC4221IGN#TRPBF
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Product Lifecycle

PCN

Oct 11, 2022

- 22_0235

Epoxy Change from Henkel 8290 to 8290A for GN Package

LTC4221CGN#PBF

PRODUCTION

LTC4221CGN#TRPBF

PRODUCTION

LTC4221IGN#PBF

PRODUCTION

LTC4221IGN#TRPBF

PRODUCTION

Apr 6, 2022

- 22_0066

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

LTC4221CGN#PBF

PRODUCTION

LTC4221CGN#TRPBF

PRODUCTION

LTC4221IGN#PBF

PRODUCTION

LTC4221IGN#TRPBF

PRODUCTION

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

LTC4221CGN#PBF

PRODUCTION

LTC4221CGN#TRPBF

PRODUCTION

LTC4221IGN#PBF

PRODUCTION

LTC4221IGN#TRPBF

PRODUCTION

Apr 6, 2022

- 22_0066

arrow down

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

LTC4221CGN#PBF

PRODUCTION

LTC4221CGN#TRPBF

PRODUCTION

LTC4221IGN#PBF

PRODUCTION

LTC4221IGN#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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