Hi expert,
Customer want to save cost on IWR6843 module design, if they don't need 3-TX simultaneously, is it good to connect 1.24V output of LP87702 to VIN RF of 6843 directly and enable on-chip LDO? I saw the input voltage range on datasheet is 1.23~1.36.
Thank you.
Allen
Allen,
Placing 1.24V at the LDO input is very close to edge of the lower spec limit. LP87702 voltage spec has +/-2% accuracy limit puts the value to spec limits for the device.
Also there would be some IR drop,margin for line regulation, Transient dips, might put the voltage out of the spec condition for the IWR6843.
Hence it's risky to use this approach for high volume production.
Thanks and regards,
CHETHAN KUMAR Y.B.
