Hello,
I'm interested in powering the LMP7721 with a +/-2.5V supply in a portable sensing application. What is the best way to:
1. Charge the device from USB - I'm thinking about using the BQ24075 here
2. Create the bipolar +/- 2.5V supplies - I see that TI has a lot of different voltage regulators.
The selection of a particular LDO is not my issue here but in going from USB -> LiPol -> voltage inverter -> LDO. My main issues are:
- Does the BQ24075 generate a regulated 5.5V output from a 3.7V battery? The datasheet says yes, but forum answers say no.
- If the output of the BQ24075 is unregulated, how can I guarantee a +5V output from my LiPol battery which I can then invert and step down as necessary? Why would I use the BQ24075 instead of other small standalone charger + regulator devices?
- Does TI have a small solution for generating regulated, low-noise bipolar supplies from a +5V input?
Many thanks,
-Rob.
