Technical Support 3B=2L K1Q any help

[LEONCE]

hello, someone knows that chip name ? 3v or 5v chip.

 

[Ahmad Safari]

RICHTEK 3B=
RT7290A

 

[LEONCE]

thanks a lot, please tell me how to recognize this type of chip with only number or letter ?

 

[Ahmad Safari]

The explanation is written in the schematic that I attached.
The first 3 letters are the model and the next two letters are the date and...