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LP8733: How to use LP873347RHDT

Part Number: LP8733
Other Parts Discussed in Thread: AWR1843, AWR1843BOOST, LP87702

1,LP873347RHDT of AWR1843BUSTOS
About how to output 1.8V and 1.24V like U4

2,Designed with reference to AWR1843 BUSTOS
I designed the board but it doesn't work properly
The part corresponding to U4 is not working as designed
I found it to be the cause.

I would like to know how the original AWR1843 BUSTOS u4 works.