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BQ24298: BQ24298Based Power Architechture Review and Questions.

Part Number: BQ24298
Other Parts Discussed in Thread: BQ24296

I desgin a power source for my GSM based device. My device is works with 5V DC input and 18650 liion battery back-up.

I need to charge if batter is not full. and need an output of 3V8 (for GSM module). 

I design schematics attached. Can u review my design. 

and also some questions.
1- I use BQ24298 for charge management. Is there a internal buck boost on BQ24298 ?
2- If question 1 is yes : then what is the output voltage of IC.

we need 3V8 output with at least 2A for our system.

Thanks .

B100BA.pdf