Power Over Ethernet (POE) Controller, -57 V/5 mA, -31 V UVLO Threshold, SSOP-36

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

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

Manufacturer Part No:
Order Code:
Technical Datasheet:
See all Technical Docs

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


Communications & Networking, Power Management

Product Information

MSL 1 - Unlimited
Find similar products Choose and modify the attributes above to find similar products.

Associated Products

Compare Selected

Related Searches


62 In stock

62 in stock for next day delivery (UK stock)

Available until stock is exhausted

see cut-off times
£10.46 £ 10.46
Price for:
Multiple: 1 Minimum: 1
Quantity Price
1 + £10.46
25 + £7.64
100 + £5.77
No longer stocked:: No Longer Manufactured::
Add to Basket
Add Line Note
Total Price:
Total Price: ( )
Total Price: --

Customer Reviews


Like to see information about this product from other customers?

 Read discussions, blogs, documents from our community members.


Select document type(s) you want to see and click “Apply Filters” button
Post a question to one of our experts or start a discussion and get responses from supplier experts and fellow engineers in our community.