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TPS61196: VIFB voltage

Part Number: TPS61196


May I ask about VIFB voltage since I couldn't find similar post regarding VIFB of TPS61196?

According to datasheet,the VIFB voltage is defined as "IFBV voltage setting range = 0.3 V to 1V".

If VIFB(min headroom voltage) is set by R10 to under 0.3V, what kind of phenomenon is concerned?

On the customer board, there are a failed case to start up at some device.

(Now R10 and R11 is 47kohm and 49kohm.)

Best Regards,

Koji Hamamoto