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About using method of TPS56528

takahiko yokota
Mastermind 7135 points
Other Parts Discussed in Thread: TPS56528

Hi

My customer uses TPS56528.
They have questions about TPS56528.
Could you answer under the questions?
1. If the Power Good doesn't use, should I open PG terminal?
2. There is a mention "A capacitor (typical 0.47 µF) should be connected to GND" about the capacitor of Vreg5  in datasheet.
    Can I connect 1uF capacitor  between the VREG5 to GND pin?
    If a capacitor is connected  between GND-VREG5, what kind of operation does this device do?
Best regards,
Yokota
  • 0
    TI__Guru**** 191445 points

    You can leave power good open if you do not need to use it.  The VREG5 is the output of an internal LDO.  It is designed to be terminated with 0.47 uF.  Other values may possibly cause instability.  So far as I know, it has not been tested with other values.  I would definitely not use a smaller value, 1 uF is not significantly larger.  It is probably ok.