LTC4421
Info : RECOMMENDED FOR NEW DESIGNS
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LTC4421

High Power Prioritized PowerPath 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 $4.65
Features
  • 0V to 36V Wide Operating Range (60V Tolerant)
  • Drives Large External N-Channel MOSFETs for High Output Current Applications
  • Accurately Limits Inrush Current
  • Connects Highest Priority Valid Supply to Output Load
  • Changes Channel Priority in Real Time
  • ±2% OV, UV Input Comparators
  • Individually Adjustable Current Limit Time-Out for Each Channel
  • Adjustable Input Validation Time
  • Fast Switchover Minimizes VOUT Droop
  • 36-Lead 5mm × 6mm QFN and SSOP Packages
Additional Details
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The LTC4421 connects one of two input supplies to a common output based on user-defined priority and validity. By definition, the supply connected to V1 is the higher priority supply, although this can be changed dynamically. External resistive dividers set the undervoltage and overvoltage thresholds that bound the valid voltage window.

Strong gate drivers switch the large external N-channel MOSFETs quickly. Fast switchover circuitry minimizes output droop when changing channels while preventing reverse and cross conduction. A fast comparator detects input short circuits and quickly turns off the N-channel MOSFETs to minimize disruption.

External sense resistors set the maximum inrush and current limit currents. During current limiting, the LTC4421 controls the N-channel MOSFET gate to regulate 25mV across the sense resistor. When the sense resistor voltage has been regulated to 25mV for a user-settable time, the channel is disconnected and a fault is set.

Applications

  • High Reliability Systems
  • Server Based Back-Up Systems
  • Industrial Handheld Instruments
  • Battery Back-Up Systems
Part Models 12
1ku List Price Starting From $4.65

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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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Aug 6, 2022

- 22_0171

Laser Top Mark Conversion for SSOP Packages Assembled in PNG

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Nov 18, 2019

- 19_0266

Laser Top Mark for SSOP36/44/48 Packages assembled in ADPG and UTAC

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Part Models

Product Lifecycle

PCN

Aug 6, 2022

- 22_0171

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Laser Top Mark Conversion for SSOP Packages Assembled in PNG

LTC4421CG#PBF

PRODUCTION

LTC4421CG#TRPBF

PRODUCTION

LTC4421HG#PBF

PRODUCTION

LTC4421HG#TRPBF

PRODUCTION

LTC4421IG#PBF

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LTC4421IG#TRPBF

PRODUCTION

Nov 18, 2019

- 19_0266

arrow down

Laser Top Mark for SSOP36/44/48 Packages assembled in ADPG and UTAC

LTC4421CG#PBF

PRODUCTION

LTC4421CG#TRPBF

PRODUCTION

LTC4421HG#PBF

PRODUCTION

LTC4421HG#TRPBF

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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

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DC2866A

LTC4421 Demo Board | Dual Channel Prioritized Powerpath Controller

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DC2866A

LTC4421 Demo Board | Dual Channel Prioritized Powerpath Controller

LTC4421 Demo Board | Dual Channel Prioritized Powerpath Controller

Product Detail

Demonstration circuit 2866A features the LTC4421 Dual Supply High Power Prioritized Powerpath Controller in a 12V/24V, 10A application. The LTC4421 incorporates strong gate drivers to switch large external N-channel MOSFETs and fast switchover circuitry to minimize VOUT droop while preventing reverse and cross conduction currents, making it an ideal solution for high reliability systems, battery back up systems, and servers. DC2866A arbitrates between two input supply rails, selecting the highest priority, valid supply to power the load. By definition, the supply connected to V1 is the higher priority supply, although it can be changed dynamically. External resistive dividers set the undervoltage and overvoltage thresholds that bound the valid voltage window. External sense resistors set the limit on maximum current that can flow to the load. Two or more DC2866As can be cascaded to provide switchover between more than two rails.

Tools & Simulations

Tools & Simulations 2

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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