Astrid
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I have a USB-powered electronics that has to work even after disconnecting from USB.
- Consumption is 100uA to 1 mA (for 100 ms) at 3V
- Used batteries are ultraminiaturní LiPo 40mAh, 1 cell 3.7V
Using switching converters for such a small current will probably ineffective, so I am thinking about using LDO.
the question is
- What LDO has its own consumption on the order of uA, preferably with automatic disconnection when the voltage drops below ~ 3V (battery protection).
The second question
How to make overlapping supply / switching power supply with power from USB?
Last question what use IC for charging such a small LiPo?
Iteální for me was a Aoonote with sample solution such things
- Consumption is 100uA to 1 mA (for 100 ms) at 3V
- Used batteries are ultraminiaturní LiPo 40mAh, 1 cell 3.7V
Using switching converters for such a small current will probably ineffective, so I am thinking about using LDO.
the question is
- What LDO has its own consumption on the order of uA, preferably with automatic disconnection when the voltage drops below ~ 3V (battery protection).
The second question
How to make overlapping supply / switching power supply with power from USB?
Last question what use IC for charging such a small LiPo?
Iteální for me was a Aoonote with sample solution such things