The LTC4267IGN-3#PBF 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.
- Precision dual level inrush current limit
- Integrated current mode switching regulator
- Onboard 25k signature resistor with disable
- Programmable classification current
- Thermal overload protection
- Power good signal
- Integrated error amplifier and voltage reference
无线, 安全, 电源管理, 通信与网络
(EN)
