MIC2172BM-TR [Microchip]

The MIC2172 and MIC3172 are complete 100kHz SMPS current mode controllers with internal 65V 1.25A power switches. The MIC2172 features external frequency synchronization or frequency adjustment, while the MIC3172 features an enable/shutdown control input. Although primarily intended for voltage step-up applications, the floating switch architecture makes it practical for step-down, inverting, and Cuk configurations as well as isolated topologies. Operating from 3V to 40V, the MIC2172/3172 draws only 7 mA of quiescent current, making it attractive for battery-operated supplies. The MIC3172 is for applications that require on/off control of the regulator and draws less than 1 μA when disabled. The MIC2172 is for applications that require two or more SMPS regulators that operate from the same input supply and features a SYNC input for locking to an external reference. The devices are available in an 8-pin plastic DIP or SOIC for –40°C to +85°C ambient temperature operation.