[Trac #977] Suspend/resume causes a popping sound

[Zarro Boogs per Child]

#977: Suspend/resume causes a popping sound
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 Reporter:  wmb at firmworks.com  |        Owner:  wad     
     Type:  defect             |       Status:  assigned
 Priority:  blocker            |    Milestone:  BTest-3 
Component:  hardware           |   Resolution:          
 Keywords:                     |  
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Comment (by wad):

 The problem with the pop seems to be that the inverter driving AMP_SHDN
 (Q43) is powered down 6 mS before the +5V supply is powered
 down.    (+3.3V is heavily loaded and turned off with a MOSFET, whereas
 +5V is lightly loaded and takes longer to drain)
 I suggest moving R335 to SUS_3.3V instead of AVDD.
 This would still leave the "pop" on power-off, but that is much less
 objectionable.

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Ticket URL: <http://dev.laptop.org/ticket/977#comment:4>
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