33730_10 Datasheet, PDF (2/26 Pages) Freescale Semiconductor, Inc – Switch Mode Power Supply with Multiple Linear Regulators

INTERNAL BLOCK DIAGRAM
INTERNAL BLOCK DIAGRAM
VBAT
VBAT
KA_VBAT
VKAM
CP
PFD
REG ON
VIGN
IGN_ON
VREF1
VREF2
P1
P2
P3
RSTKAM
RSTH
RST3
RSTL
UVLO
/OVLO
Feed
Forward
Ramp
Generator
VKAM
15 mA, I_LIM,
T_LIM
Protection
FET
Drive
Charge
Pump
Enable
Oscillator
Buck
Control Logic
CP ^{HS Drive}
Level
Shifter
+
–
–
+
+
–
V_BG
10.4 K
1.98 K
5.0 V
I_LIM=15 0mA
26.5 V,-1V,T_LIM
5.0 V
I_LIM=150 mA
26.5 V,-1V,T_LIM
Ref. Voltage
Programming
Block
T-lim
Standby
Control
Bandgap
Preference
V_BG
V_KAM, V_DDL, V_DD3,
V_{DD3_SBY}
Reference Voltage
V_KAM
Reset Detect
V_DDH
Reset Detect
V_DD3
Reset Detect
V_DDL
Reset Detect
VDD3
I_Lim, T_Lim
VDD3_SBY
I_Lim, T_Lim
VDDL
I_Lim
HR Timer
SW
SW
FREQ
BOOT
SR
INV
VCOMP
VDDH
VDD3_B
VDD3
VDDL_B
VDDL
HRT
GND
33730
2
Figure 2. 33730 Simplified Internal Block Diagram
Analog Integrated Circuit Device Data
Freescale Semiconductor