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TPS62040: Softstart Issue

BJ Han
Expert 2035 points
Part Number: TPS62040

Dear TI,

We will contact you regarding the Softstart.

The circuit configuration is as follows.

The problem was that the start was delayed than the existing product(EUP3412).

1. 1.35V : EUP3412 (Power Sequence)

2. 1.35V : TPS62040 Power Sequence

What do I need to do to change the start time?



.

  • 0
    TI__Guru*** 144230 points
    Hi BJ,

    It's not clear what your question is. Is the TPS62040's output voltage 1.35V?

    What is EUP3412?

    As well, the TPS62040 is quite old and requires a larger inductor than the 2.2uH that you are using.
  • 0 in reply to Chris Glaser
    Expert 2035 points
    Dear Chris,
    The competitor's product(EUP3412) has been discontinued and the Pin-to-Pin capable TPS62040 has been used.
    Currently, is there a way to get a quick start on the problem that 1.35V starts late?
    Compared to existing products, TI products are slow to respond at startup.
    Can you fix this?
  • 0 in reply to BJ Han
    TI__Guru*** 144230 points
    Hi BJ,

    Thanks for explaining what EUP3412 is.

    What exactly would you like to change? The 2 waveforms are at different timescales and volts/div, and the cursors don't seem to be measuring something. It is not clear what you need.