MCZ33989EG Freescale Semiconductor, MCZ33989EG Datasheet - Page 40

• Manufacturer Part Number: MCZ33989EG
• Description: IC SYSTEM BASIS CHIP CAN 28-SOIC
• Manufacturer: Freescale Semiconductor

Specifications of MCZ33989EG

• Applications: *
• Interface: *
• Voltage - Supply: *
• Package / Case: 28-SOIC (7.5mm Width)
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Voltage Regulator
regulator, fully integrated and protected, and the V2 regulator
V1 Regulator
capability of 200 mA max. It requires external decoupling and
are:
V2 Regulator: Operation with External Ballast Transistor
Its accuracy relative to V1 is ±1%. It requires external
decoupling and stabilizing capacitors. The recommended
value are: 22 µF esr < 5 ohms, and 47 µF esr < 10 ohms.
40
33989
TYPICAL APPLICATIONS
SUPPLEMENTAL APPLICATION NOTES
The MC33989 contains two 5 V regulators: The V1
The V1 regulator is 5 V output, 2% accuracy with current
stabilizing capacitors. The minimum recommended value
• C4: 100 nF
• C3: 10 µF < C3 < 22 µF, esr < 1 ohms. 22 µF < C3 <
The V2 regulator is a tracking regulator of the V1 output.
47 µF, esr < 5 ohms. C3 > = 47 µF, esr < 10 ohms
S0
CAN bus
Rp0
CL0
Rs0
C1
Figure 21. Device Typical Application Schematic
C1
Rt
C2
C2
Figure 22. V2 Regulator Operation
VSUP
R1
VSUP
CANH
HS1
L0
L1
L2
L3
CANL
no connect
Partial View
MC33989
V2CTRL
V2CTRL
MC33989
Q1
GND
V2
V2
VDD1
MISO
MOSI
RST
VDD1
SCK
RST
WD
INT
CS
C5
TX
RX
C6
which operates with an external ballast transistor. This is
illustrated in the following device typical application
schematic.
regulator and 5 V power supply input to the CAN interface.
Ballast transistor selection: PNP or PMOS transistors can be
used. A resistor between base and emitter (or source and
drain) is necessary to ensure proper operation and optimized
performances. Recommended bipolar transistor is MJD32C.
V2 Regulator: Operation without Ballast Transistor
does not requires more than the maximum output current
capability of the V1 regulator, then the ballast transistor can
be omitted. The thermal aspects must be analyzed as well.
Safe circuitry
C3
C3
The V2 pin has two functions: sense input for the V2
The external ballast transistor is optional. If the application
The electrical connections are shown in
Auxiliary 5V
C4
C4
partial view
RST
RST
INT
SPI
CAN
MCU
GND
VDD
VDD
MCU
Analog Integrated Circuit Device Data
Components list:
C1: 22uF, C2: 100nF
C3: >10uF
C4: 100nF
Components list:
C1: 22uF, C2: 100nF
C3: >10uF
C4: 100nF
C5: >10uF
C6: 100nF
R1: 2.2k
Rt: 60 - 120
Rp0 to Rp3: 22k
Rs0 to Rs3: 22 k
CL0 to CL3: 10nF
Q1: MJD32C
Freescale Semiconductor
Figure
22.