TPS65262-1: Unused Channel

Nikhil Pai

Part Number: TPS65262-1

I'm not using BUCK3 and I require the Pgood signal. If I want to use the automatic sequencing (MODE = HIGH), how should I connect the following pins:

VIN3

BST3

LX3

FB3

EN3

If I choose not to use the automatic sequencing (MODE = LOW), how does the above change?

Regards,

over 6 years ago

0 Jason Wang (BSR-MV) over 6 years ago

TI__Genius 9550 points

hi Pai,
Setup as below:
if BUCK3 is unused, setting as below:
Connect FB3 to COMP3;
Connect COMP3 to GND via 10k and 1nF (series)
EN3 floating or tie to high
SS3 floating
PVIN3/LX3/BST3 floating
The PGOOD will detect BUCK1/2's operation status.

Either MODE low or high, the setup is same.

Power management

Power management forum

TPS65262-1: Unused Channel