TPS51275B: Quiescent current

Hi Jeff, 

Looks like your part is switching. VO1 supply current is when the part is not switching. What you are measuring is not quiescent current but input current. For input current, higher values like ~20mA looks reasonable with no load at output. With higher load current, this input current will be higher. 

This app note clearly mentions the difference between input current and quiescent current.

/cfs-file/__key/communityserver-discussions-components-files/196/IQ-_2D00_-What-it-is_2C00_-what-it-isn_1920_t_2C00_-and-how-to-use-it.pdf

Regards,

Gautam

Hi Gautam,

Sorry, should be output no load standby current. So you mean 20mA is reasonable, right?

But there have no this standby current in datasheet?

Thanks!

Jeff

Jeff, if the converter is switching then its normal as it will its corresponding loses included here.