Rainbow Electronics MAX8982X User Manual
Page 36
Power-Management ICs for
ICERA E400/E450 Platform
MAX8982A/MAX8982X
36
Figure 4. MAX8982A/MAX8982X Power-On Timing Diagram at Initial Startup with EN Connected to IN1_. BUCK3 and OUT8 Are for
the MAX8982A Only.
OFF
OFF
EN AND IN1_
BUCK 3
BUCK 2
OUT 3
OUT 8
RESET
FOR ANALOG (2.8V)
FOR USB (3.0V)
FOR IO (1.8V)
(3.2V)
UVLO RISING
UVLO FALLING
ON SEQUENCING RESTARTS
WHEN INPUT IS ABOVE
UVLO RISING
THRESHOLD
~16ms
125µs
225µs
375µs
125µs
OUT 9
FOR BB (0.9V)
125µs
625µs
31µs
CONTINUOUS
32kHz OUTPUT
IRQ
OPERATING
STATE
POWER-ON
SEQUENCE
POWER-ON
SEQUENCE
ON
OTHER ON-
REGULATORS
31µs TO 62µs
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