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DRV5053: What are the implications of not using the bypass capacitor between Vcc and GND?

Kevin Penn
Prodigy 50 points
Part Number: DRV5053

I have a design using the DRV5053VAQLPG that did not have the bypass capacitor between Vcc and GND.  What are the implications of not having this bypass capacitor in the design?

  • 0
    TI__Mastermind 27715 points

    Hi Kevin,

    Not providing sufficient bypass capacitance to the DRV5053 will result in the same problems as seen in most active analog devices:

    • High-frequency noise or fast transients on the power supply will be conducted through the IC, rather than shunted (bypassed) through the capacitor which looks like a low impedance at high frequencies. This results in higher noise at the IC output, depending on its power supply rejection.
    • Fast changes in current demanded by the IC can cause a droop on the power supply voltage, since power supplies are typically very slow to respond to load transients. The bypass capacitor acts as local charge storage and can discharge quickly to provide current to the IC, preventing line disturbance.

    Best regards,

    Ian Williams
    Applications Manager
    Current & Magnetic Sensing