LTC4267CGN-1#PBF

LTC4267-1 is an IEEE 802.3af compliant powered device (PD) interface with a current mode switching regulator, providing a complete power solution for PD applications. It 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. It 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. It includes an on-board error amplifier and voltage reference allowing use in both isolated and non-isolated configurations. It is used in application such as IP phone power management, wireless access points, security cameras, power over Ethernet etc.

• On-board 100V, UVLO switch
• Precision dual level inrush current limit
• Integrated error amplifier and voltage reference
• Oscillator frequency is 200KHz typical
• Soft-start time is 1.4ms typical
• Peak current sense voltage is 100mV typical
• Supply voltage is -57V maximum at (voltage with respect to VPORTP pin)
• Operating ambient temperature is 0°C to 70°C
• Package style is 16-lead narrow plastic SSOP

附註

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party