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TPS53219(A) output voltage limit is 5.5V. Why?

Reinald Gerhardt
Prodigy 30 points
Other Parts Discussed in Thread: TPS53219

Hi TI team,

Why does the TPS53219(A) datasheet specify an upper limit for the output voltage of 5.5 V?

What would be the implications of exceeding the 5.5 V limit by a few Volts? The input voltage is 19.5 V.

Thanks,

RG

  • 0
    TI__Guru**** 191445 points

    I don't support TPS53219 directly, but for other DCAP devices the maximum output voltage is limited by the adaptive on time controller.

  • 0 in reply to JohnTucker
    Prodigy 30 points

    Hi John,

    Thanks for the explanation. The datasheet specifies a minimum off-time of 400 ns worst case. I can see that depending on switching frequency and input voltage, this limits the maximum output voltage. What I can still not see where that number of  5.5 V is coming from.
    Even if I make assumptions about the operating conditions, like Vin = 12 V, f = fmax = 1 MHz, I am not getting to 5.5 V.

    RG