LTC4267-1 - Power over Ethernet IEEE 802.3af PD Interface with Integrated Switching Regulator
The LTC4267-1 combines an IEEE 802.3af compliant Powered Device (PD) interface with a current mode switching regulator, providing a complete power solution for PD applications. The LTC4267-1 integrates the 25k signature resistor, classification current source, thermal overload protection, signature disable and power good signal along with an undervoltage lockout optimized for use with the IEEE-required diode bridge. The LTC4267-1 provides an increased operational current limit, maximizing power available for class 3 applications.
The current mode switching regulator is designed for driving a 6V rated N-channel MOSFET and features programmable slope compensation, soft-start, and constant frequency operation, minimizing noise even with light loads. The LTC4267-1 includes an onboard error amplifier and voltage reference allowing use in both isolated and nonisolated configurations.
The LTC4267-1 is available in a space saving, low profile 16-pin SSOP package.
Features
Typical Application | Applications
Packaging |
Order Information
| Part Number | Package | Temp | Price(1-99) | Price (1k)* |
|---|---|---|---|---|
| LTC4267CGN-1#PBF | SSOP-16 | C | $2.75 | $2.10 |
| LTC4267CGN-1#TRPBF | SSOP-16 | C | $2.16 | |
| LTC4267IGN-1#PBF | SSOP-16 | I | $3.33 | $2.55 |
| LTC4267IGN-1#TRPBF | SSOP-16 | I | $2.61 |
