Datasheet

Schematics and Layouts
© 2008 Microchip Technology Inc. DS70336A-page 55
FIGURE 1-3: DAUGHTER BOARD SCHEMATIC 2 OF 5
VOUT2
Stage 2 Buck
D
G
S
D
G
S
VIN Feedback
C15
0.1uF
U2
LM5101
TX2
CST1_060L
Q6
FDS6298
Q7
FDS6298
C13
220uF 25V Elec
R21
DNP
Q8
BSR14_SOT23
R22
1k
R23
20R 1% 1/8W
D5
BAS16
R24
20k 1% 1/8W
R25
2.2k 1% 1/8W
C14
2.2nF 25V
D6
BAS16
R26
22R 1% 1/8W
C16
0.1uF
9VANA_GND
C19
0.1uF
9VANA_GND
9VANA_GND
D8
BAS16
R27 22R
R28
5.1k
C17
C18
R29
3.3K
R30
5K
J5
9VANA_GND
9VANA_GND
R45 R47
+9V
TP10
Buck2+
+3.3V_DIG
9VANA_GND
9VANA_GND
9VANA_GND
D12
LED_0805
R58
10k
9VANA_GND
C30
4.7uF 25V
D16
Schottky
D7
Diode_DO-214
L4
10uH
TP11
GND
J13
Cuurent SenseBuck2
J12
R20
3.3K
9VANA_GND
R31
3.3K
Comp2
PWM2H
PWM2L
HO
LO
HS
3
HI
LI
4
8
5
6
Voltage FB2
Comp 2
Cuurent Sense2
2
3
VDD
Vss
V
IN
150uF 6.3V T ANT
150uF 6.3V T ANT
HB
A
B
B
A
10K
2.4K
B
A
BA
B
A
3
B
A
B
A
A
B
A
B
B
A
B
A
Voltage FB Buck2
B
A
B
A
B
A
C3 470pF
A
B
B
A
B
A
A
B
A
B
BA
3