[Lanwer]

Thank you for your answer.

1) I was not aware of the battery switch dropout voltage V_DO,BAT of the PMIC (p. 9) which has a typical value of 60mV (no max value stated).  I don’t think this will have an impact thought as I am still within the range of the required supply voltage (above 2.7 V for both ICs). Is there another reason why I should definitely avoid the use of the built-in LDO TL5209?

1) Considering your tip, won’t I need then another whole circuit to take care of the battery charging? Or can I just take the SYS_VOUT on the balls K6, K7, L6, L7 and route it to another LDO with a better drop-out voltage, enable this new LDO by the TPS65217C LDO4 as it’s the case for the TL5209 and use this new LDO’s output voltage (3V3) to supply the two ICs mentioned earlier.

2)Any suggestions for an LDO that Octavo Systems is considering to replace the TL5209 in the future?

Thanks

[Author]

Posts