ltc4267cgn-1 Linear Technology Corporation, ltc4267cgn-1 Datasheet

ltc4267cgn-1

Manufacturer Part Number

ltc4267cgn-1

Description

Power Over Ethernet Ieee 802.3af Pd Interface With Integrated Switching Regulator

Manufacturer

Linear Technology Corporation

Datasheet

1.LTC4267CGN-1.pdf (32 pages)

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Bonase Electronics (HK) Co., Limited

Part Number:

LTC4267CGN-1

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FEATURES

■

APPLICATIO S

■

All other trademarks are the property of their respective owners.

TYPICAL APPLICATIO

, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.

IP Phone Power Management

Wireless Access Points

Security Cameras

Power over Ethernet

Complete Power Interface Port for IEEE 802

Powered Device (PD)

Onboard 100V, UVLO Switch

Precision Dual Level Inrush Current Limit

Integrated Current Mode Switching Regulator

Onboard 25k Signature Resistor with Disable

Programmable Classiﬁ cation Current (Class 0-4)

Thermal Overload Protection

Power Good Signal

Integrated Error Ampliﬁ er and Voltage Reference

Low Proﬁ le 16-Pin SSOP Package

Class 2 PD with 3.3V Isolated Power Supply

.3af

Integrated Switching Regulator

IEEE 802.3af PD Interface with

DESCRIPTIO

The LTC

Powered Device (PD) interface with a current mode switch-

ing regulator, providing a complete power solution for PD

applications. The LTC4267-1 integrates the 25k signature

resistor, classiﬁ cation 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 pro-

grammable slope compensation, soft-start, and constant

frequency operation, minimizing noise even with light

loads. The LTC4267-1 includes an onboard error ampliﬁ er

and voltage reference allowing use in both isolated and

nonisolated conﬁ gurations.

The LTC4267-1 is available in a space saving, low proﬁ le

16-pin SSOP package.

4267-1 combines an IEEE 802.3af compliant

Power over Ethernet

•

LTC4267-1

42671f

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