MAX1978 Evaluation Kit
VDD
REF
VDD
GND
OS1
R8
OPEN
C19
22µF
C20
OPEN
R4
R6
SHORT
(PC TRACE)
CTLI
R2
49.9kΩ
1%
VDD
R1
0.068Ω
1%
SHORT
(PC TRACE)
REF
CS
C5
OPEN
C4
0.01µF
ITEC
CTLI
C2
C3
10µF
R3
100kΩ
1%
R5
OPEN
R7
OPEN
CS
1µF
VDD
1
C1
4.7µF
48
OS1
47
CS
46
45
CTLI
44 43
GND
42
GND
41
40
39
38
37
REF
V
MAXV MAXIN
MAXIP COMP ITEC
FREQ
OS2
DD
1
JU1
36
35
2
OS2
3
2
3
N.C.
N.C.
PGND2
34
PGND1
L2
3µH
4
5
33
32
LX1
LX2
PGND1
PGND2
CS
C12
1µF
L1
3µH
31
LX1
6
7
LX2
VDD
C7
1µF
VDD
U1
30
29
PVDD2
PVDD1
N.C.
MAX1978
C11
10µF
C6
10µF
8
N.C.
28
LX1
VDD
9
10
11
LX2
VDD
PVDD2
SHDN
27
26
PVDD1
GND
1
R25
100kΩ
2
3
JU3
OT
12
25
GND
OT
VDD
UT INTOUT
13 14
INT-
15
GND
16
R14
DIFOUT
17
FB-
18
FB+
19
BFB-
20
BFB+
21
AIN+
22
AIN- AOUT
23 24
REF
R26
100kΩ
REF
C10
0.047µF
1MΩ
ATO
UT
R13
10kΩ
0.1%
FB+
THERM
R10
R12
R11
C9
10µF
R16
100kΩ
R15
C8
69.8kΩ
1%
20kΩ
105kΩ
R9
20kΩ 0.47µF
C16
OPEN
1%
1%
80.6kΩ
1%
CTLI
C17
1µF
C21
OPEN
JU2
REF
GND
INT0
Figure 4. MAX1978 EV Kit Schematic (Sheet 1 of 2)
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9
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
