LTC4263
Info : RECOMMENDED FOR NEW DESIGNS
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LTC4263

Single IEEE 802.3af Compliant PSE Controller with Internal Switch

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 8
1ku List Price Starting From $3.54
Features
  • IEEE 802.3af Compliant
  • Operation from a Single 48V Supply
  • Fully Autonomous Operation without Microcontroller
  • Internal MOSFET with Thermal Protection
  • Power Management Works Across Multiple Ports with Simple RC Network
  • Precision Inrush Control with Internal Sense Resistor
  • Powered Device (PD) Detection and Classification
  • AC and DC Disconnect Sensing
  • Robust Short-Circuit Protection
  • Pin-Selectable Detection Back-off for Midspan PSEs
  • Classification Dependent ICUT Current Threshold
  • LED Driver Indicates Port On and Blinks Status Codes
  • Available in 14-Pin SO and 4mm × 3mm DFN Packages
Additional Details
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The LTC4263 is an autonomous single-channel PSE controller for use in IEEE 802.3af compliant Power over Ethernet systems. It includes an on-board power MOSFET, internal inrush, current limit, and short-circuit control, IEEE 802.3af compliant PD detection and classification circuitry, and selectable AC or DC disconnect sensing. On-board control algorithms provide complete IEEE 802.3af compliant operation without the need of a microcontroller. The LTC4263 simplifies PSE implementation, needing only a single 48V supply and a small number of passive support components.

Programmable on-board power management circuitry permits multiple LTC4263s to allocate and share power in multi-port systems, allowing maximum utilization of the 48V power supply—all without the intervention of a host processor. The port current limit can be configured to automatically adjust to the detected PD class. Detection back-off timing is configurable for either Endpoint or Midspan operation. Built-in foldback and thermal protection provide comprehensive fault protection.

An LED pin indicates the state of the port controlled by the LTC4263. When run from a single 48V supply, the LED pin can operate as a simple switching current source to reduce power dissipation in the LED drive circuitry.

The LTC4263 is available in 14-pin 4mm × 3mm DFN and 14-pin SO packages.

Applications

  • IEEE 802.3af Compliant Endpoint/Midspan PSEs
  • Single-Port or Multi-Port Power Injectors
  • Power Forwarders
  • Low-Port Count PSEs
  • Environment B PSEs
  • Standalone PSEs
Part Models 8
1ku List Price Starting From $3.54

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Documentation

Documentation

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

PCN

Jan 20, 2022

- 21_0269

Addition of Alternate Assembly Site ASE Taiwan for Select LFCSP Products

LTC4263CDE#PBF

PRODUCTION

LTC4263CDE#TRPBF

PRODUCTION

LTC4263IDE#PBF

PRODUCTION

LTC4263IDE#TRPBF

PRODUCTION

Oct 12, 2022

- 22_0251

Epoxy Change from Henkel 8290 to 8290A for 14-Lead SOIC Package

LTC4263CS#PBF

PRODUCTION

LTC4263CS#TRPBF

PRODUCTION

LTC4263IS#PBF

PRODUCTION

LTC4263IS#TRPBF

PRODUCTION

Aug 6, 2022

- 22_0173

Laser Top Mark Conversion for SOICN14 and SOICN16 Packages Assembled on ADPG [PNG]

LTC4263CS#PBF

PRODUCTION

LTC4263CS#TRPBF

PRODUCTION

LTC4263IS#PBF

PRODUCTION

LTC4263IS#TRPBF

PRODUCTION

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Jan 20, 2022

- 21_0269

arrow down

Addition of Alternate Assembly Site ASE Taiwan for Select LFCSP Products

LTC4263CDE#PBF

PRODUCTION

LTC4263CDE#TRPBF

PRODUCTION

LTC4263IDE#PBF

PRODUCTION

LTC4263IDE#TRPBF

PRODUCTION

Oct 12, 2022

- 22_0251

arrow down

Epoxy Change from Henkel 8290 to 8290A for 14-Lead SOIC Package

LTC4263CS#PBF

PRODUCTION

LTC4263CS#TRPBF

PRODUCTION

LTC4263IS#PBF

PRODUCTION

LTC4263IS#TRPBF

PRODUCTION

Aug 6, 2022

- 22_0173

arrow down

Laser Top Mark Conversion for SOICN14 and SOICN16 Packages Assembled on ADPG [PNG]

LTC4263CS#PBF

PRODUCTION

LTC4263CS#TRPBF

PRODUCTION

LTC4263IS#PBF

PRODUCTION

LTC4263IS#TRPBF

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

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