Linear Technology LTC4257IS8#PBF
- Part Number:
- LTC4257IS8#PBF
- Manufacturer:
- Linear Technology
- Ventron No:
- 3267046-LTC4257IS8#PBF
- Description:
- IC POE 802.3AF CONTROLLER 8-SOIC
- ECAD Model:
-
- Datasheet:
- LTC4257IS8#PBF
Description
The LTC4257 is an IEEE 802.3af PD power interface controller that simplifies PD design by integrating essential functions into a single 8-pin package. It features an onboard 100V, 400mA power MOSFET, 25k signature resistor, programmable classification current source, input current limit with thermal foldback, undervoltage lockout, and power good signaling.
Features
Complete power interface port for IEEE 802.3af 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 x 3mm) DFN packages
Applications
IP phone power management
Wireless access points
Telecom power control
The LTC4257 is an IEEE 802.3af PD power interface controller that simplifies PD design by integrating essential functions into a single 8-pin package. It features an onboard 100V, 400mA power MOSFET, 25k signature resistor, programmable classification current source, input current limit with thermal foldback, undervoltage lockout, and power good signaling.
Features
Complete power interface port for IEEE 802.3af 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 x 3mm) DFN packages
Applications
IP phone power management
Wireless access points
Telecom power control
Linear Technology LTC4257IS8#PBF technical specifications, attributes, parameters and parts with similar specifications to Linear Technology LTC4257IS8#PBF.
- Factory Lead Time8 Weeks
- Package / Case8-SOIC (0.154, 3.90mm Width)
- Surface MountYES
- Operating Temperature-40°C~85°C
- PackagingTube
- Published2005
- JESD-609 Codee3
- Part StatusActive
- Moisture Sensitivity Level (MSL)1 (Unlimited)
- Number of Terminations8
- ECCN CodeEAR99
- Terminal FinishMatte Tin (Sn)
- Voltage - Supply57V Max
- Terminal PositionDUAL
- Terminal FormGULL WING
- Peak Reflow Temperature (Cel)260
- Number of Functions1
- Reflow Temperature-Max (s)30
- Base Part NumberLTC4257
- Pin Count8
- JESD-30 CodeR-PDSO-G8
- Number of Channels1
- Power - Max12.95W
- Current - Supply3mA
- Internal Switch(s)Yes
- Number of Transceivers4
- Standards802.3af (PoE)
- Auxiliary SenseNo
- Length4.9025mm
- Width3.899mm
- RoHS StatusROHS3 Compliant
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