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參數資料
型號: TPS51020DBTR
廠商: TEXAS INSTRUMENTS INC
元件分類: 穩壓器
英文描述: DUAL SWITCHING CONTROLLER, 450 kHz SWITCHING FREQ-MAX, PDSO30
封裝: GREEN, PLASTIC, TSSOP-30
文件頁數: 9/29頁
文件大小: 672K
代理商: TPS51020DBTR
TPS51020
SLUS564C JULY 2003 REVISED OCTOBER 2008
17
www.ti.com
APPLICATION INFORMATION
D The output voltage sensing trace and the feedback components should be as short as possible and be
isolated from the power components and traces.
D The low pass filter for VIN should be placed close to the TPS51020 and be referenced to signal GND.
D The bootstrap capacitor CBST (connected from VBST to LL) should be placed close to the TPS51020.
D VREG5 requires at least 4.7-F bypass capacitor which should be placed close to the TPS51020 and be
referenced to signal GND.
D The discharge (VO1_VDDQ, VO2) should better have a dedicated trace to the output capacitor. In case of
limiting the discharge current, series resistors should be added.
D Ideally, all of the area directly under the TPS51020 chip should also be signal GND.
1
2
3
4
30
29
28
27
VBST1
OUT1_U
LL1
OUT1_D
INV1
COMP1
SSTRT1
SKIP
TPS51020
5
6
7
8
26
25
24
23
OUTGND1
TRIP1
VIN
TRIP2
VO1_VDDQ
DDR
GND
REF_X
9
10
11
22
21
20
VREG5
REG5_IN
OUTGND2
ENBL1
ENBL2
VO2
12
19
OUT2_D
PGOOD
13
14
15
18
17
16
LL2
OUT2_U
VBST2
SSTRT2
COMP2
INV2
Cvinbp
Rvin
L01
L_FET1
Cin1
H_FET1
Co1
Rtrip1 Ctrip1
+
L02
L_FET2
Cin2
H_FET2
Co2
Rtrips Ctrip2
+
Cvreg5
Cin
+
CH1 Output Voltage (+)
CH1 Output Voltage (GND)
Input Voltage (+)
Input Voltage (GND)
CH2 Output Voltage (GND)
CH2 Output Voltage (+)
Power GND
Signal GND
CBST1
CBST2
Figure 4. PCB Trace Guideline
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相關代理商/技術參數
參數描述
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