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LP87564-Q1: Multiple LP8756x devices with phased CLKIN

Part Number: LP87564-Q1

I am planning to use 3 LP8756x devices to power an SOC.

I am considering delivering 3 individual 2MHz CLKIN clocks to the 3 devices at 0, 30, and 60 degree phases.

Will that result in guaranteed 12 phase switching across the 3 devices?

I see the internal LP8756x PLL generates an internal 24MHz clock.  I am unsure if the phase relationship to the incoming 2MHz clock is preserved, or if it can vary.  If it can vary, this fancy clocking scheme would not be worth much.

  • Hi Barry,

    The idea of the SYNC_CLKIN is to be able to sync internal BUCK clock to external clock frequency and phase. So in principal that should work. But i have to say i haven't seen any designs with three devices using different phases for every device but should be doable.

    Br, Jari