INTERNAL BLOCK DIAGRAM
INTERNAL BLOCK DIAGRAM
VMODE
VBATT
HVB
LVB
VBATT
LVB
Driver
VMODE
VO1_SENSE
PGOOD1(Int)
VREF
VO1_SENSE
PGOOD1(Int)
CLEAR
BANDGAP
REFERENCE
V_STDBY
VOUT1
VREF
VGATE
LSWO
PGOOD1(Int)
PGOOD1(Int)
VO1_SENSE
POWER
SWITCH1
VO1_SENSE
VO1_SENSE
VIN1
PGOOD1
VGATE
RESET
Block 1
REF1
Step-UpDown
DC/DC
PGOOD1_DELAY
Converter
CH1
SW1
RESET1_TH
EAIN1
PGND1
VOUT2
EAOUT1
VGATE
DMAX1
POWER
SWITCH2
PGOOD2(Int)
VGATE
VO1_SENSE
VO2_SENSE_IN
VO2_SENSE
PGOOD2(Int)
PGOOD2
RESET
Block 2
HG
REF2
LG
Step-UpDown
PGOOD2_DELAY
EAOUT2
DC/DC
Converter
CH2
VIN2
EAIN2
SW2
DMAX2
PGND2
SREGI1
VGATE
REF3
Series Pass
Regulator1
SREGC1
SREGO1
SREGI2
VGATE
SREGC2
SREGC3
Series Pass
Regulator2
REF4
V_STDBY
SREGO2
SREG2G
SREGI3
VGATE
VO1_SENSE
VBATT
WAKE1B
WAKE2B
Series Pass
Regulator3
REF5
WAKE3B
WAKE4B
SREGO3
VBATT
EXT_CLOCK
PGOOD1(Int)
PGOOD2
SEQ_SELECT
DATA
CH_PUMP
CPoff
STRB
VBATT
VGATE
CONTRO(LInt)
Control
Logic
SEQ_SELECT
SCKIN
VO1_SENSE
VGATE
CLEAR
SLEEP
Step-Up
DC/DC
Convertor
VG_SELECT
SWGATE
EXT_CLOCK
VGATE_DUTY
REF4
GNDGATE
GND
REF2
REF1
VGATE
REF3
REF5
VGATESEL1
VGATESEL2
EXT gate
On
VREF
VGATE_EXT
On
Buffer
REF DAC
WATCHDOG
Figure 2. MPC18730 Simplified Internal Block Diagram
18730
Analog Integrated Circuit Device Data
Freescale Semiconductor
2
FREESCALE [ Freescale ]
