MC34164-3 Datasheet, PDF (2/23 Pages) Freescale Semiconductor, Inc – 3.0 A 1.0 MHz Fully Integrated DDR Switch-Mode Power Supply

INTERNAL BLOCK DIAGRAM
INTERNAL BLOCK DIAGRAM
STBY SD
Thermal
Monitoring
PG
System
M1
I_{se nse}
Reset
Current ^{I limit}
Monitoring _Discharge
FREQ
O scillato r
Prog. Frequency
System
Control
I nte rn a l
Voltage
Regulator
VDDI
M2
VIN
BOO T
VIN VBOOT
PV IN
Buck
Cntl.
FS _W
Gate
M3
Logic
Driver ^Isense
SW
VDDI
VREFIN
V _DDI
Bandgap
Reg ulat or
VBG
RREF1
Buffer
RREF2
M6
Discharge
Ramp
Generator
PWM
Comparator
M4
PG ND
E rr or
A mp lif ier
COMP
I NV
M5
Discharge
VOUT
GND ^VREFOUT
Figure 2. 34712 Simplified Internal Block Diagram
34712
2
Analog Integrated Circuit Device Data
Freescale Semiconductor