LTC4257 Overview
U U LTC4257 IEEE 802.3af PD Power over Ethernet Interface Controller.
LTC4257 Key Features
- plete Power Interface Port for IEEE 802.3af® Powered Devices (PDs)
- Onboard 100V, 400mA Power MOSFET
- Precision Input Current Limit
- Onboard 25k Signature Resistor
- Programmable Classification Current (Class 0-4)
- Undervoltage Lockout
- Smart Thermal Protection
- Power Good Signal
- Available in 8-Pin SO and Low Profile (3mm × 3mm)
- IP Phone Power Management
LTC4257 Applications
- 48V FROM POWER SOURCING