LTC4267IGN-3#PBF

LINEAR TECHNOLOGY  LTC4267IGN-3#PBF  芯片, PD接口, 带开关稳压器

The is 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 under voltage 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.

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Precision dual level inrush current limit

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Integrated current mode switching regulator

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Onboard 25k signature resistor with disable

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Programmable classification current

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Thermal overload protection

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Power good signal

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Integrated error amplifier and voltage reference