Datasheet

Page 8
Page 9
1
3
1
2
3
4
8
7
6
5
VCC- 5V
VCC- 5V
2
GND
Vout
Vin
REG1
MC33269DT3.3
E2
10uF
3.3V VOLTAGE REGULATOR
VCC- 3.3V
E1
10uF
D3
1N4007
D5
1N4007
D2
1N4007
D4
1N4007
CN2
CN46
VCC- 5V
POWER
R2
2K2
LD1
E4
330uF/35V
E5
330uF/35V
SWC
SWE
CT
GND
DRVC
IPK
VIN
CMPR
U2
MC34063A
R10
0.22
R7
3K
C9
220pF
D6
MBRS140T3
L1 220uH
VCC-EXT
R8
1K
+ -
5V SWITCHING POWER SUPPLY
VCC- 5V
VCC
VCC- 5V
VCC- 3.3
J1
1
2
3
4
VCC
GND
D-
D+
CN1
USB B
VCC- 5V VCC- USB
D1
MBRS140T3
FP1
FERRITE
C7
100nF
Figure 1-4: Power supply schematic