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TPS54331: V_Ref in Data Sheet

Fabian Hoppe
Intellectual 360 points
Part Number: TPS54331
Other Parts Discussed in Thread: TPS56339, TPS54302

Hello,

can anybody tell me what is meant with V_ref in this formular? Page 15 in datasheet and topic point 9.2.2.3

  • Former Member
    0 Former Member

    Hi Fabian,

    Vref means voltage reference, and you can find its min/typ/max value at the Electrical Characteristics table(Page6).

    Thanks.

    BRs,

    Bruce

  • 0 in reply to Former Member
    Intellectual 360 points

    Hi,

    thanks. Is there actually an offset Voltage? For example that V_in hast to be at  least 0.5V higher than V_out?

  • Former Member
    0 Former Member in reply to Fabian Hoppe

    Hi Fabian,

    TPS54331 is a non-sync BUCK converter with high-side N-MOSFET integrated. To ensure there is enough driver voltage at the gate of high-side N-MOSFET, Vin shoule better be 2.1V higher than Vout.

    To support large duty cycle applications, sync BUCK like TPS54302/TPS56339 should be more applicable. 

    Thanks.