The improved power scheme OpenBCI with

As used OpenBCI power scheme:

1, the positive power conversion negative power supply: LM2664 Charge Pump

2, the positive 2.5V LDO: using TLV70025,200mA output quiescent current 31uA, ultra low drop output of 175mV 200mA, output noise 48uVRMS (100Hz ~ 100kHz)

     It may be employed TPS73225, the better, lower noise;

3, the negative 2.5V LDO: using TPS72325;