Hi,
I use a Li-lon battery for the system who has an AM3354 CPU(need a buck output is 3.3v 1.8v 1.2v), an AFE4403 to get HR and SpO2, an ADS1292R to get ECG and a 3 inch LCD. A BQ51050B has been used to charge the battery and supply for the system. Can you give me some suggestions about the Li-lon battary and buck?