An improved method of monitoring the output power provided by a switch mode power
converter that reduces the overall cost of the converter. The method includes initiating
a soft-start procedure for a first output voltage in the event the first voltage
channel is enabled. When the first voltage level comes within regulation, a delay
counter counts a predetermined number of clock cycles. In the event a second output
voltage channel is enabled between the time the first channel is enabled and the
time the first voltage comes within regulation, a soft-start procedure is initiated
for the second voltage and the delay counter re-starts when the second voltage
comes within regulation. After the delay counter finishes counting, the first and
second voltages are considered stable and a single Power-Good signal is asserted.
In the event one of the channels is disabled by a user while the other channel
remains enabled, the disabled channel is ignored and the PGOOD signal stays asserted
to indicate that the power provided by the converter on the enabled channel is good.