LTC4267-3 - Power over Ethernet IEEE 802.3af PD Interface with Integrated 300kHz Switching Regulator
Datasheet Documentation
Datasheet
Reliability Data
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Overview

Features

Typical Application

LTC4267-3 Typical Application

Description

The LTC4267-3 combines an IEEE 802.3af compliant Powered Device (PD) interface with a 300kHz current mode switching regulator, providing a complete power solution for PD applications. The LTC4267-3 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 LTC4267-3 provides an increased operational current limit, maximizing power available for class 3 applications.

The 300kHz current mode switching regulator provides higher output power or smaller external size compared to its lower frequency counterparts. The LTC4267-3 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 LTC4267-3 includes an onboard error amplifier and voltage reference allowing use in both isolated and nonisolated configurations.

The LTC4267-3 is available in a space saving, low profile 16-pin SSOP or DFN packages.

Packaging

5x3 DFN-16,SSOP-16

LTC4267-3 Package Drawing
LTC4267-3 Package Drawing
Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price
(1-99)		 Price
(1k)*
LTC4267CDHC#PBF DFN 16 C $2.92 $2.20
LTC4267CDHC#TRPBF DFN 16 C $2.30
LTC4267CDHC-3#PBF DFN 16 C $2.92 $2.20
LTC4267CDHC-3#TRPBF DFN 16 C $2.30
LTC4267CGN#PBF SSOP 16 C $2.75 $2.10
LTC4267CGN#TRPBF SSOP 16 C $2.16
LTC4267CGN-1#PBF SSOP 16 C $2.75 $2.10
LTC4267CGN-1#TRPBF SSOP 16 C $2.16
LTC4267CGN-3#PBF SSOP 16 C $2.75 $2.10
LTC4267CGN-3#TRPBF SSOP 16 C $2.16
LTC4267IDHC#PBF DFN 16 I $3.50 $2.65
LTC4267IDHC#TRPBF DFN 16 I $2.75
LTC4267IDHC-3#PBF DFN 16 I $3.50 $2.65
LTC4267IDHC-3#TRPBF DFN 16 I $2.75
LTC4267IGN#PBF SSOP 16 I $3.33 $2.55
LTC4267IGN#TRPBF SSOP 16 I $2.61
LTC4267IGN-1#PBF SSOP 16 I $3.33 $2.55
LTC4267IGN-1#TRPBF SSOP 16 I $2.61
LTC4267IGN-3#PBF SSOP 16 I $3.33 $2.55
LTC4267IGN-3#TRPBF SSOP 16 I $2.61
LTC4267CDHC DFN 16 C $5.84 $4.40
LTC4267CDHC#TR DFN 16 C $4.60
LTC4267CGN SSOP 16 C $5.50 $4.20
LTC4267CGN#TR SSOP 16 C $4.32
LTC4267IDHC DFN 16 I $7.00 $5.30
LTC4267IDHC#TR DFN 16 I $5.50
LTC4267IGN SSOP 16 I $6.66 $5.10
LTC4267IGN#TR SSOP 16 I $5.22
LTC4267CGN-3 SSOP 16 C $5.50 $4.20
LTC4267IGN-3 SSOP 16 I $6.66 $5.10
LTC4267CGN-3#TR SSOP 16 C $4.32
LTC4267IGN-3#TR SSOP 16 I $5.22
LTC4267CDHC-3 DFN 16 C $5.84 $4.40
LTC4267CDHC-3#TR DFN 16 C $4.60
LTC4267IDHC-3 DFN 16 I $7.00 $5.30
LTC4267IDHC-3#TR DFN 16 I $5.50
* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.


Part Number Description Price Documentation
DC1249A LTC4267-3 PD, 37-57V input, 3.3V@ 3A out $75.00