R1213K Series

R1213K Series are CMOS-based, PWM control low consumption current step-up DC/DC converter ICs. A low ripple high efficiency step up DC/DC converter can be composed of R1213K with only an inductor, a diode, divider resistors and capacitors and feed back voltage is 0.8V. As protection circuits, a current limit circuit for limit peak current of Lx cycle by cycle, a timer latch protection circuit which stops built-in driver if the load current is beyond the current limit and low VOUT continues for a certain time also built in. Further, thermal shutdown function and under voltage lockout (UVLO) function are built in. Operation halting by the protection circuit is connected to the FLAG output function and control an external P-channel MOSFET and cut off the current path from the power supply to the output. To reset the latch function, restart with power-on (power supply voltage must be equal or less than UVLO detector threshold) or toggling CE pin.