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PMM Rup Pwr
PMM R
DWN
t-Time- s/divm
TPS23841
SLUS745A – NOVEMBER 2006 – REVISED MAY 2007
POWER MANAGEMENT MODE FUNCTIONAL DESCRIPTION (continued)
PMM Rup Pwr function turns on the port power by ramping up the current that is being delivered to the load in a
controlled fashion. The output current ramps from 0 mA to I
LIM
(typically 650 mA) in approximately 500 µ s.
Figure 14 shows the output voltage and current turning on for a 250-mA load.
Figure 14.
PMM R
DWN
function turns off the port power by ramping down the current in a controlled fashion. The output
current ramps from I
LIM
(typically 650 mA) to 0mA in approximately 300 µ s. Figure 15 shows the output voltage
and current shutting down for a 250-mA load.
Figure 15.
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