TPS3704-Q1: Clarification needed in TPS3704-Q1 ADJ_resistor_calculator document

Pavithra S

Part Number: TPS3704-Q1

Tool/software:

Hi we are interested in your product TPS37043BJOFDDFRQ1, Voltage supervisor in the TPS3704-Q1 ADJ_resistor_calculator document , there mentioned as current need to flow in R2 resistor is considered as at least 50 times the I sense, why particularly 50 times is there any technical requirement to take the current value?

Is this condition/Consideration applicable to any voltage divider circuit along with any other ICs (ADC, Supervisor ICs)?

over 1 year ago

0 Masoud Beheshti61 over 1 year ago

TI__Mastermind 18061 points

Hello,

Due to the US holidays, our team will respond back the week of July 7^th.

Thank you for your patience.

0 Oscar Ambriz over 1 year ago in reply to Masoud Beheshti61

TI__Expert 8620 points

Hello Pavithra,

The 50x recommendation is more of a good practice rule of thumb. We want to ensure that there is adequate current for the necessary voltage drop of R2 and enough to supply the sense current of 350 nA. Of course the user could use a scalar less than the 50x, just be sure that in your calculation the current is adequate for the R2 voltage drop and Isense.

Regards,

Oscar Ambriz

Power management

Power management forum

TPS3704-Q1: Clarification needed in TPS3704-Q1 ADJ_resistor_calculator document