LTC4257-1

RECOMMENDED FOR NEW DESIGNS

IEEE 802.3af PD Power over Ethernet Interface Controller with Dual Current Limit

Part Models
8
1ku List Price
Starting From $1.29
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Part Details

  • Complete Power Interface Port for IEEE 802®.3af  Powered Devices (PDs)
  • Onboard 100V, 400mA Power MOSFET
  • Precision Dual Level Current Limit
  • Onboard 25k Signature Resistor with Disable
  • Programmable Classification Current (Class 0-4)
  • Undervoltage Lockout
  • Thermal Overload Protection
  • Power Good Signal
  • Available in 8-Pin SO and Low Profile (3mm x 3mm) DFN Packages
LTC4257-1
IEEE 802.3af PD Power over Ethernet Interface Controller with Dual Current Limit
Powered Device (PD) Product Package 1 Product Package 2
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Documentation

Data Sheet

This is the most up-to-date revision of the Data Sheet.

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Hardware Ecosystem

Parts Product Life Cycle Description
PoE Powered Device (PD) 1
LT4275 RECOMMENDED FOR NEW DESIGNS LTPoE++/PoE+/PoE PD Controller
Power Monitors 1
LT2940 PRODUCTION Power and Current Monitor
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Tools & Simulations

LTspice 1


Models for the following parts are available in LTspice:

  • LTC4257
  • LTC4257-1
LTspice

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.


Evaluation Kits

eval board
DC671A

LTC4257CS8-1 | Power-Over-Ethernet Interface Controller, Vsig = 48V, VOUT = 3.3V

Product Details

DC671A: Demo Board for the LTC4257-1 IEEE 802.3af PD Power over Ethernet Interface Controller with Dual Current Limit.


 


DC671A
LTC4257CS8-1 | Power-Over-Ethernet Interface Controller, Vsig = 48V, VOUT = 3.3V
DC671A Demo Board DC671A Demo Board DC671A Demo Board DC671A Demo Board DC671A - Schematic

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