Other Parts Discussed in Thread: BQ24070,
Hello good day,
I currently have a vehicle tracking device with the following regulation scheme:
The supply voltage is 9v – 30v, this voltage passes through the LMR23630AFDDAR regulator which regulates the output to 5v, this voltage enters the BQ24070 regulator which delivers an output of 4.4v when there is external power or the battery voltage when there is no external power supply, this voltage is supplied to the TL1963A-33 regulator which regulates at 3.3v
According to the datasheet for the TL1963A-33 regulator, the output voltage regulation is from 4.3v to 20v, which would be within range when external power is present but would be out of range when the backup battery powers the system.
My questions for the experts at Texas instruments are as follows.
Am I using the wrong regulator for 3.3v regulation on this device?
Is it better to use a buck-bost regulator for this case?