TPS7A47: Can ANY-OUT LDO output setting be changed on the fly?

Scott Brenneman

Part Number: TPS7A47

We're considering using an ANY-OUT LDO and an I2C IO Expander, such as outlined in appnote SBVA035A, to change the LDO output setting under firmware control. What's not clear to us is if this can be done on the fly, while the LDO is under load. Is this mode of operation acceptable?

Thanks,

Scott

8 months ago

+1 Stephen Ziel 8 months ago

TI__Mastermind 29560 points

Hi Scott,

If you are trying to change the setpoint while the LDO is operating under load, then yes, this should be fine. Keep in mind that if the LDO is lightly loaded and you switch from a high Vout to a low Vout, it will take time to discharge Cout based on the light load.

Thanks,

Stephen

0 Scott Brenneman 8 months ago in reply to Stephen Ziel

Genius 3265 points

Great, thank you!

Scott

Power management

Power management forum

TPS7A47: Can ANY-OUT LDO output setting be changed on the fly?