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TLV62090: min/max switching frequency

Ryuji
Guru 20090 points
Part Number: TLV62090

Hello,

Could you please let me know the min/max switching frequency at heavy load?
According to the datasheet figure 3~6 ,  is the fsw(min) about 1.1MHz and fsw(max) about 1.5MHz?

Best Regards,
Ryuji

  • 0
    TI__Expert 3465 points

    Hello Ryuji,

    it's a pleasure to support you. Figure 3 to 8 in the datasheet show the switching frequency dependency with the load current Iout and input voltage Vin and output voltage Vout. The combination of these 3 conditions establish the switching frequency regime. Furthermore also the passives influence the switching frequency, so keep in mind that the pictures refer to this configuration: L = 1 µH, Cout = 22 µF

    Hence, you should identify the graph closer to your case's operating condition and refer to that one to estimate the switching frequency. Example:

    Vout=1.8V ; Vin= 2.8V  : Iout=1A to 3A -> figure 3 fits -> fmax=1.5MHz circa ; fmin=1.25 MHz circa

    Enjoy your design!

    Best Regards,

    Emmanuel

  • 0 in reply to Emmanuel Granatello
    Guru 20090 points
    Hello Emmanuel san,

    I appreciate your supply.
    Could you please let me know the switching frequency vs. temperature data?
    Our customer would like to know the frequency variation by temperature.
    I appreciate it if you share the data.

    Best Regards,
    Ryuji
  • 0 in reply to Ryuji
    Guru 20090 points

    Hi Emmanuel san,

    I got additional question.

    Could you please let me know the part to part difference of switching frequency on same condition?

    Best Regards,
    Ryuji

  • 0 in reply to Ryuji
    TI__Expert 3465 points
    Hello Ryuji,

    TLV62090 has DCS control topology, hence the switching frequency variation depends on input voltage, load current, output voltage and output filter as well. Due to all these variables playing their role, we are not able to gather switching frequency variations over temperature and process.

    Best regards,
    Emmanuel