Microchip Technology AC164133 Data Sheet
Buck/Boost Converter PICtail™ Plus Daughter Board User’s Guide
DS70336A-page 56
© 2008 Microchip Technology Inc.
FIGURE 1-4:
DAUGHTER BOARD SCHEMATIC 3 OF 5
V
OU
T
3
20V
/0
.75A
S
tag
e 3
Bo
o
s
t
D
G
S
9
VANA
_
G
N
D
9
VANA_
G
N
D
L5
2
2uH
9V
A
N
A
_
G
N
D
C28
0.1
uF
C5
0.47nF
Q14
FDT4
59
N
C24
0.1
uF
C25
R5
2
22
R
1%
1
/8W
D9
BAS1
6
+9
V
R53
0.5R
R5
4
1k
C26
4.7u
F 25V
C27
220uF
25V
Elec
J8
R55
20k
1% 1
/8W
R56
3.3k
D13
LED
_080
5
R59
10k
9
V
ANA_
G
N
D
D1
0
S
c
hot
tky
TP1
2
B
oos
t+
TP
13
GND
R13
20k
1% 1
/8W
R14
2.2k 1%
1/8W
C20
2.2n
F 25
V
R15
5.1k
+3
.3
V_
DIG
9
V
ANA_
G
N
D
Q4
BS
R1
4_SO
T23
9
VANA_
G
N
D
Vo
lt
a
g
e
F
B
Bo
o
s
t
U3
T
C
14
28C
O
A
R3
4
3.3
K
+3
.3
V_
DIG
PWM
3
H
INB
V
o
lt
ag
e F
B
2
C
u
rr
ent
Sens
e
3
INA
NC
V
SS
NC
OUT
A
V
DD
OU
T
B
A
A
A
A
A
B
B
B
B
B
A
B
R5
4
A
B
A
B
V
IN
A
B
A
B
A
B
B
A
0.1
uF
C4
J1
5
A
B
A
B
A
B
8
7
5
6
C
u
rrent
S
e
n
s
e2
J14