mc33905s Freescale Semiconductor, Inc, mc33905s Datasheet - Page 83

• Manufacturer Part Number: mc33905s
• Description: System Basis Chip Gen2 With High Speed Can And Lin Interface
• Manufacturer: Freescale Semiconductor, Inc

where 2 reverse battery diodes can be used for optimization
of the filtering and buffering capacitor at the VDD pin. This
allows using a minimum value capacitor at the V
guarantee reset free operation of the MCU during the
Analog Integrated Circuit Device Data
Freescale Semiconductor
V
The following figure illustrates the application case
BAT
ex 3: No External Transistor, V
delivered by internal path transistor.
D1
V
BAT
D1
ex1: Single V
VBAUX
VSUP1
VSUP2
Q2
Partial View
VCAUX
VBAUX
VSUP1
VSUP2
Q2
SUP
Partial View
VCAUX
DD
Supply
VDD
VAUX
VE
VB
~100 mA Capability
VAUX
VDD
VE
VB
5 V/3.3 V
Q1
Figure 39. Application Options
DD
5 V/3.3 V
pin to
V
BAT
cranking pulse, and temporary (50 ms) loss of the V
supply.
without using the VAUX regulator are illustrated as well.
Applications without an external ballast on V
D1
C1
V
BAT
Optimized solution for cranking pulses.
C1 is sized for MCU power supply buffer only.
C2
D2
D1
ex 4: No External Transistor - No VAUX
ex2: Split V
VBAUX
VBAUX
VSUP1
VSUP2
VSUP1
VSUP2
Q2
Partial View
Partial View
SUP
VCAUX
VCAUX
Supply
VAUX
VAUX
VDD
TYPICAL APPLICATIONS
VE
VDD
VB
VE
VB
5 V/3.3 V
Q1
DD
and
33904/5
BAT
83