资 源 简 介
The TC125/126 step-up (Boost) switching regulatorsfurnish output currents to a maximum of 80 mA(VIN = 2V, VOUT = 3V) with typical efficiencies above80%. These devices employ pulse frequency modulaTIon(PFM) for minimum supply current at low loads.They are ideal for battery-operated applicaTIonspowered from one or more cells. Maximum supplycurrent is less than 70 μA at full output load, and lessthan 5 μA in standby (VOUT = 3V). Both devices requireonly an external inductor, diode, and capacitor toimplement a complete DC/DC regulator.The TC126 has separate output voltage sensing andchip power inputs for greater applicaTIon flexibility. TheTC125 combines the output voltage sensing and chippower inputs onto a single package pin, but adds apower-saving Shutdown mode that suspends regulatoroperaTIon and reduces supply current to less than 0.5μA when the shutdown control input (SHDN) is low.The TC125/TC126 are available in a small 5-PinSOT-23 package, occupy minimum board space anduse small external components. The TC125 acceptsinput voltages from 2V to 10V. The TC126 acceptsinput voltages from 2.2V to 10V. Both the TC125 andTC126 have a start-up voltage of 0.9V at light load.
