Maxim Integrated MAXQ7667 - Manual (Page 270)

__________________________________________________________________________________________________________ 16-4
MAXQ7667 User’s Guide
Figure 16-1. MAXQ7667 Power-Supply Block Diagram
AVDD BROWNOUT
MONITOR
ANALOG
MODULE
INT
ASR.14:DVLVL
AVDD
(+3.3V)
AGND
DVDD
POWER-ON RESET
AND
BROWNOUT MONITOR
DVDDIO BROWNOUT
MONITOR
(OPTIONAL) PASS
TRANSISTOR TO ASSIST
IN PROVIDING +5V*
GENERAL-PURPOSE
I/O DIGITAL
*DVDDIO CAN BE POWERED EXTERNALLY WITH A 5V SOURCE OR CAN BE CONNECTED TO THE INTERNAL 5V REGULATOR USING A PASS TRANSISTOR.
DVDDIO*
(+5V)
DGND
DIGITAL
CORE
DVDD
(+2.5V)
DGND
DVDDIO
2.5V
REGULATOR
REG2P5
(OPTIONAL) 2.5V CAN BE
CONNECTED TO DVDD
AS POWER SOURCE
RESET
APE.5:VABE
AIE.4:AVBIE
APE.8:VIBE
AIE.6:VIBIE
APE.10:LRDPD
REG3P3
(OPTIONAL) 3.3V CAN BE
CONNECTED TO DVDD
AS POWER SOURCE
APE.9:LRAPD
APE.7:VDPE
APE.6:VDBE
AIE.5:VDBIE
ASR.13:AVLVL
INT
ASR.4:AVBI
INT
ASR.15:VIOLVL
ASR.6:VIBI
ASR.5:VDBI
3.3V
REGULATOR
GATE5
VI N
DGND
APE.11:LRIOPD
5V
REGULATOR