sc1485itstr Semtech Corporation, sc1485itstr Datasheet - Page 19

• Manufacturer Part Number: sc1485itstr
• Description: Dual Synchronous Buck Pseudo Fixed Frequency Power Supply Controller
• Manufacturer: Semtech Corporation

In Figure 11, VOUT1 and VSSA1 are routed as a differential pair from the output capacitors back to the feedback
components and device. Similarly, VOUT2 and VSSA2 are routed as a differential pair from the output capacitors
back to the feedback components and device.
POWER MANAGEMENT
2005 Semtech Corp.
C7
0402
C15
56p
0402
VOUT
VOUT1
VOUT
VOUT2
R4
0402
R3
0402
R9
20k0
0402
R13
20k0
0402
Figure 11: Differential Routing of Feedback and Ground Reference Traces
VSSA1
VSSA2
22
23
24
25
26
27
28
10
11
12
13
14
8
9
U1
EN/PSV1
TON1
VOUT1
VCCA1
FB1
PGD1
VSSA1
EN/PSV2
TON2
VOUT2
VCCA2
FB2
PGD2
VSSA2
SC1485
PGND1
PGND2
VDDP1
VDDP2
ILIM1
ILIM2
BST1
BST2
DH1
DH2
DL1
DL2
LX1
LX2
7
6
5
4
3
2
1
21
20
19
18
17
16
15
VOUT2
VSSA2
19
VOUT1
VSSA1
VSSA1
VSSA2
R6
R12 0R (2)
0402
0402
0R (2)
+
+
C8
7343
C16
220u/25m
7343
SC1485
www.semtech.com
+
+
C3
7343
C17
220u/25m
7343
VOUT1
VOUT2