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Original question:

TPSM5D1806: Enable Pin

TPSM5D1806: Schematic Review

Karthik Shenoy
Prodigy 160 points
Part Number: TPSM5D1806

1806.pdf

For generating 1.8V and 1.5V output voltages, we are forcing the respective voltages in the Enable pin as shown in the pdf. Is it the correct way to do and what will be the voltage level in EN1 and EN2 pin respectively?

  • 0
    TI__Mastermind 30520 points

    Hello Karthik, 

    I re assigned this to Ryan Chen, we will provide review next week 

    Thanks!

    Tahar

  • 0
    TI__Expert 8236 points

    Hi Karthik,

    The way to adjust the output voltage is to change the feedback resistor divider which is placed at the output instead of at EN. 

    The device will work when EN is greater than 1.2 V and stops switching when it falls below 1.1 V. 

    In your case, for 1.8 V output, I would recommend the top feedback resistor of 26.1k and the bottom feedback resistor of 10k.

    1.5 V output I would recommend the top feedback resistor to be 20 k and the bottom feedback to 10 k. 

    Best, 

    Ryan