34704_09 Datasheet, PDF (3/49 Pages) Freescale Semiconductor, Inc – Multiple Channel DC-DC Power Management IC

INTERNAL BLOCK DIAGRAM
OUT8
SW8
BT8
FB8
OUT7
DRV7
FB7
VREF7
COMP7
VOUT6
SW6
BT6
FB6
BT5D
PVIN5
SW5D
VOUT5
SW5U
BT5U
COMP5
FB5
VDDI
SCL
SDA
RST
VIN
AGND
REG8
INTERNAL BLOCK DIAGRAM
voltage data
Control
voltage data
Control
REG1/VG
L _{Error Amp}
PWM
VG
Error Amp
REG7 (34704A)
voltage data
Control
PWM
Error Amp
Amp
Error Amp
Start-Up
Ipeak-det
and blanking
SW control
PWM
P-skip
REG2
voltage data
Control
VG
VG
Error Amp
PWM
P-skip
VG
REG6 (34704A)
voltage data
Control
L _{Error Amp}
PWM
VG
Error Amp
VG
REG5
voltage data
Control
Error Amp
PWM
P-skip
VG
VG
VDDI (2.5V) VDDIMON (VDDIdet)
I²C
Reset Driver
Registers
To Reg 1-8
Sequencer
OSC/Divider
Soft Start
REG3
VG
voltage data
Control
Error Amp
PWM
P-skip
REG4
VG
voltage data
Control
Error Amp
PWM
P-skip
VG
VIN
UVLO
Detection
Thermal
Detection
Startup Control
ADC
VOUT1 (34704A)
VG
SW1
BT1
BT2D
PVIN2
SW2D
VOUT2
SW2U
BT2U
COMP2
FB2
BT3
PVIN3
SW3
VOUT3
FB3
BT4D
PVIN4
SW4D
VOUT4
SW4U
BT4U
FB4
COMP4
ONOFF
LION
FREQ
SS
PGND (EXPAD)
Figure 2. 34704 Internal Block Diagram
Analog Integrated Circuit Device Data
Freescale Semiconductor
34704
3