high performance current mode switching regulator cuts component count

Available now from RS Components, the Freescale MCZ34670EG current mode switching regulator combines a power interface port for IEEE 802.3af powered devices (PDs) and a high-performance current-mode switching regulator. It allows a designer to build PDs with a minimum of external components by means of integrating the required IEEE 802.3af functions and all functions necessary to build a high efficiency DC-DC converter. On the PD side the 34670 fully supports the IEEE802.3af standard and provides complete signature and power classification functions. It controls inrush current limiting and incorporates adjustable under-voltage lockout. The switching regulator provides excellent line and load regulation. It drives an external Power MOSFET with sense resistor, says the company.