INTERNAL BLOCK DIAGRAM
INTERNAL BLOCK DIAGRAM
SD
Internal
Voltage
Regulator
VIN
Thermal
Monitoring
PG
M2
System
Reset
System
Control
M1
VDDI
BOOT
PVIN
ILIMIT
Discharge
VIN VBOOT
Buck
Control
Logic
Oscillator
FSW
Prog Frequency
M3
M4
FREQ
ILIM
Gate
Driver
ISENSE
SW
Prog Soft Start
ISENSE
Current
Monitoring
ILIMIT
PWM
Comparator
VDDI
–
PGND
COMP
VDDI
Ramp
Generator
VBG
Bandgap
Regulator
Error
Amplifier
–
INV
VREFIN
GND
Reference
Selection
VBG
M5
VOUT
Discharge
Figure 2. 34713 Simplified Internal Block Diagram
34713
Analog Integrated Circuit Device Data
Freescale Semiconductor
2