参数资料
型号: SC1485ITSTRT
厂商: Semtech
文件页数: 17/27页
文件大小: 0K
描述: IC REG CTRLR BUCK PWM 28-TSSOP
标准包装: 1
PWM 型: 控制器
输出数: 2
占空比: 90%
电源电压: 1.8 V ~ 25 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: -40°C ~ 125°C
封装/外壳: 28-TSSOP(0.173",4.40mm 宽)
包装: 标准包装
产品目录页面: 1358 (CN2011-ZH PDF)
其它名称: SC1485ITSDKR
NOT RECOMMENDED FOR NEW DESIGN
SC1485
POWER MANAGEMENT
The layout can be considered in two parts, the control section referenced to VSSA1/2 and the power section.
Looking at the control section first, locate all components referenced to VSSA1/2 on the schematic and place
these components at the chip. Connect VSSA1 and VSSA2 using either a wide (>0.020”) trace. Very little current
flows in the chip ground therefore large areas of copper are not needed.
5VSUS
VBAT
5VSUS
R1
0402
R2
10R
0402
VOUT1
22
23
24
U1
EN/PSV1
TON1
VOUT1
SC1485
BST1
DH1
LX1
7
6
5
C7
R4
PGOOD
0402
0402
25
26
27
VCCA1
FB1
PGD1
ILIM1
VDDP1
DL1
4
3
2
C4
R3
0402
C9
28
VSSA1
PGND1
1
C10
1uF
0603
1nF
0402
1uF
0603
VSSA1
5VSUS
VBAT
5VSUS
R7
1M
0402
R8
10R
0402
VOUT2
8
9
10
EN/PSV2
TON2
VOUT2
BST2
DH2
LX2
21
20
19
C15
R9
PGOOD
56p
0402
20k0
0402
11
12
13
VCCA2
FB2
PGD2
ILIM2
VDDP2
DL2
18
17
16
C18
R13
20k0
0402
C19
14
VSSA2
PGND2
15
C20
1uF
0603
1nF
0402
1uF
0603
VSSA2
Figure 9: Components Connected to VSSA1 and VSSA2
? 2005 Semtech Corp.
17
www.semtech.com
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