MIC7400_15 Datasheet, PDF (35/68 Pages) Micrel Semiconductor – Configurable PMIC, Five-Channel Buck Regulator Plus One-Boost with HyperLight Load® and I2C Control

Micrel, Inc.
Timing Diagrams
Normal Power-Up Sequence for Outputs
The STDEL register sets the delay between powering up
of each regulator at initial power-up (see power-up
sequencing in Figure 19). Once all the internal power
good registers PGOOD[1-6] are all “1”, then the global
PG pin goes high without delay if the PGOOD_MASK[6]
bit is set to “0”.
MIC7400
The PORDEL register sets the delay for the POR flag pin.
The POR delay time starts as soon as the AVIN pin
voltage rises above the system UVLO upper threshold
set by the PORUP register. The POR output goes low
without delay if AVIN falls below the lower UVLO
threshold set by the PORDN register.
March 3, 2015
Figure 19. MIC7400 Power-Up/Down
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Revision 2.0