[SI-LIST] Re: About Power Management IC which can sink current
- From: steve weir <weirsi@xxxxxxxxxx>
- To: Han Li <jasonleehan@xxxxxxxxx>
- Date: Sun, 07 Sep 2008 21:26:53 -0700
A DC-DC can be made to sink by regeneratively driving back into the
input rail. As long as the input rail bulk caps are big enough this
works fine.
Steve.
Han Li wrote:
> Hi, Gurus,
> In DDR termination, Vtt requirements a Power Supply IC that can sink
> and source current. Many of these are LDO, some are DC-DC(such as Linear's
> LTC3776).
> I wondered how does current flow into a DC-DC when in sink mode. (It seems
> relatively easier to analyze when an IC is a LDO, but swithing an one). What
> is the sink-current path inside an IC. Does it have an inside load which
> porvides a path to ground?
> Thank you very much.
>
>
>
>
>
--
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