Sti:OKDatasheet > Semiconductor blad > Ricoh Datasheet > R1221N31XH-TR
R1221N31XH-TR spec: Step-down DC/DC converter with voltage detector. Output voltage (Vout) 3.1V. Detector threshold (-Vdet). Stepwise setting with a step of 0.1V in the range of 1.2V to 4.5V. Oscillator frequency 500kHz