參數(shù)資料
型號(hào)： SC614EVB
廠商： Semtech Corporation
英文描述： Low Noise Backlight and Flash Driver With Serial Interface
中文描述： 低噪聲背光和閃光串行接口驅(qū)動(dòng)程序
文件頁(yè)數(shù)： 14/25頁(yè)
文件大小： 395K
代理商： SC614EVB
2006 Semtech Corp.
POWER MANAGEMENT
Applications Information (Cont.)
SC614
United States Patent No. 6,504,422
www.semtech.com
14
Layout Guidelines
The following layout is suggested (shown as three-layer (top, bottom and ground layer) only for clarity). C1 is the
input capacitor which should be placed close to pin 17. C2 is the output capacitor which should be placed close to
pin 16. The capacitors C3 and C4 are the bucket capacitors which can carry up to the full load current of 434mA
pulsed for one half clock cycle (at either 250kHz or 1.33MHz depending upon selected operating frequency).
Multiple vias should be used whenever it is necessary to change layers on nets connecting to CIN, VOUT, C1+,
C1-, C2+ and C2-. As mentioned before, the thermal pad should connect to ground using multiple vias, with 4 vias
recommended.
Top Copper and Top Silkscreen
Layout Guidelines Schematic
C2
1u
C1
2u2
C3 1u
C4 1u
VIN
11
VIN
17
EN
2
SDA
7
SCL
8
ASEL
5
SDIM
3
MDIM
4
FL
6
VOUT
9
VOUT
16
M1
1
M2
24
M3
23
M4
22
S1/FL3
20
S2/FL2
19
S3/FL1
18
GND
12
GND
21
T
2
C
1
C
1
C
1
C
1
U1
SC614
VBAT
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