A
A
B
B
C
C
D
D
E
E
4
4
3
3
2
2
1
1
EXTERNAL POWER INPU
T
7-12VDC/AC
12
3
4
MC33269
5.0V, 3.3V
& Adj
REGULATOR
POWER GOOD LED
Rhigh
Rlow
INPUT
+5VDC
+
-
Vout = 1.25( 1 + (Rlow/Rhigh))
Rlow = 107 1% for 1.8V
Rlow = 243 1% for 2.5V
Rlow = 127 1% for 1.9V
DSPD Design
POW
ER SUPPLIES
DSP56F8
58EVM.DSN
1.2
10
11
Thursday, January 10, 2002
A
DS
P Standard Products Division
2100 East Elliot Road
Tempe, Arizona 85284
Tit
le
Docu
ment
Date:
Siz
e
Design
er:
Shee
t
of
Rev.
Numbe
r
(480) 413-5090 FAX: (480) 413-2510
+5.0V
+5.0VA
+3.3V
+3.3V
VCC
+1.8V
+5.0V
+5.0V
C54
0.1uF
C58
0.1uF
U13
MC33269DT-3.3
3
2
4
1
VIN
VOUT
VOUT
GND
L1
FERRITE BEAD
L4
FERRITE BEAD
L3
FERRITE BEAD
+
C55
47uF
10VDC
R83
270
C56
0.1uF
U14
MC33269DT-ADJ
3
2
4
1
VIN
VOUT
VOUT
GND
R81
243
1%
R82
107
1%
+
C59
47uF
10VDC
L2
FERRITE BEAD
+
C57
47uF
10VDC
TB1
1
2
LED7
P2
1
3
2
U12
MC33269DT-5
3
2
4
1
VIN
VOUT
VOUT
GND
+
C53
470uF
16VDC
-+
D4
3
1
4
2
D1
FM4001
D2
FM4001
D3
FM4001
56858EVM Schematics, Rev. 3
Freescale Semiconductor
Appendix A-11
Figure
A-10. Power Supplies
Содержание 56858
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