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LM61460-Q1: <100k res on FBT

Shinji Tsuji
Genius 12558 points
Part Number: LM61460-Q1

Hi team,

Due to maximum resistor value restrictions for automotive design rule (avoid weak short due to water), 

I cannot use >100kohm resister. 

Can I use <100kohm resistor for FBT(feedback divider top resistor)?

regards,

  • 0
    TI__Guru 50120 points

    Hello,

    Yes the customer can go lower than the recommended 100kOhm value for top resistor. 

    The reason why this was recommended was a compromise between a too low of a value that may be loading the output voltage rail and a too high of a value (MOhm) that may introduce noise into the FB. Customer can use a 50kOhm top resistor and whatever bottom resistor is needed to regulate to their intended output voltage. 

    Regards,

    Jimmy