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LP5910: Drop out voltage concern

Patty Chuang
Intellectual 1155 points
Part Number: LP5910

Hi Team,

Customer has concerns of LP5910 drop out voltage:

We want to change 1.1V/3A buck to LDO and LDO input connect to 1.35V

1. LP5910 minimum operation voltage is 1.3V. Is there any lower voltage part? 

1.35V output spec range is 1.283~1.49V. LDO voltage drop will be a concern.

Maximum 1.1V current is 170mA

2. Please also provide LP5910 voltage drop out VS loading current curve at 1.1V output w/ 25C and 125C.

 

Thanks!

 

Best Regards,

Patty

  • 0
    TI__Mastermind 43580 points

    Hi Patty,

    I think that the TPS7A10 would be a better part here. One key difference is that it requires a VBIAS rail which needs to be higher than VIN for it to work. 

    For question #2, we may have to take data to get the VDO at 1.1VOUT at 25C and 125C.  Given the Covid-19 situation, this may take some time. 

    Does this work for you?