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LINEAR TECHNOLOGY  LTC4258CGW#PBF  Power Over Ethernet (POE) Controller, -57 V/5 mA, -31 V UVLO Threshold, SSOP-36

LINEAR TECHNOLOGY LTC4258CGW#PBF
Manufacturer Part No:
LTC4258CGW#PBF
Order Code:
1663730
Technical Datasheet:
See all Technical Docs

Image is for illustrative purposes only. Please refer to product description.

Product Overview

The LTC4258CGW#PBF is a quad Hot Swap Controller designed for use in IEEE 802.3af compliant power sourcing equipment (PSE). It consists of four independent ports, each with output current limit, short-circuit protection, complete Powered Device (PD) detection and classification capability and programmable PD disconnect using DC sensing. Used with power MOSFETs and passives, the LTC4258 can implement a complete IEEE 802.3af-compliant PSE. It can operate autonomously or be controlled by an I²C serial interface. Up to 16 LTC4258s may coexist on the same data bus, allowing up to 64 powered Ethernet ports to be controlled with only two digital lines. Fault conditions are optionally signaled with the INT pin to eliminate software polling. External power MOSFETs, current sense resistors and diodes allow easy scaling of current and power dissipation levels and provide protection against voltage and current spikes and ESD events.
  • IEEE 802.3af compliant PD detection and classification
  • Output current limit with foldback
  • Short-circuit protection with fast gate pull-down
  • PD Disconnect using DC sensing
  • Power good indication
  • 4-bit Programmable digital address allows control of up to 64 Ports
  • Programmable INT pin eliminates software polling
  • Current and duty cycle limits protect external FETs

Product Information

Input Voltage:
3V
Output Current:
-
UVLO:
2.7V
Controller IC Case Style:
SSOP
No. of Pins:
36Pins
Duty Cycle (%):
-
Frequency:
400kHz
Operating Temperature Min:
0°C
Operating Temperature Max:
70°C
Packaging:
Cut Tape
Product Range:
-
MSL:
MSL 1 - Unlimited
SVHC:
No SVHC (17-Dec-2015)

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Applications

  • Communications & Networking
  • Power Management

Legislation and Environmental

Country of Origin:
Malaysia

Country in which last significant manufacturing process was carried out

RoHS Compliant:
Yes
Tariff No:
85423990
Weight (kg):
.0002

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