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參數資料
| 型號： | TPS62222DDC |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | 400-mA, 1.25-MHz, HIGH-EFFICIENCY, STEP-DOWN CONVERTER IN THIN-SOT23 |
| 中文描述： | 400毫安，1.25 MHz的，高效率，降壓型轉換器薄，SOT23封裝 |
| 文件頁數： | 16/20頁 |
| 文件大小： | 464K |
| 代理商： | TPS62222DDC |
www.ti.com
Layout Considerations
V
I
GND
EN
SW
FB
C1
4.7
μ
F
L1
4.7
μ
H
C2
10
μ
F
TPS62220
V
I
2.5 V 6 V
V
O
1.8 V / 400 mA
R1
R2
C1
C2
Typical Applications
V
I
GND
EN
SW
FB
C3
10
μ
F
L1
10
μ
H
C4
10
μ
F
TPS62220
V
I
3.6 V to 6 V
V
O
3.3 V/400 mA
R1
680 k
R2
120 k
C1
10 pF
C2
150 pF
1
2
3
5
4
V
I
GND
EN
SW
FB
C3
4.7
μ
F
L1
10
μ
H
C4
10
μ
F
TPS62220
V
I
2.7 V to 6 V
V
O
2.5 V/400 mA
R1
510 k
R2
130 k
C1
15 pF
C2
150 pF
1
2
3
5
4
TPS62220, TPS62221, TPS62222
TPS62223, TPS62224
TPS62228, TPS62229
SLVS491C–SEPTEMBER 2003–REVISED SEPTEMBER 2004
For all switching power supplies, the layout is an important step in the design, especially at high peak currents
and switching frequencies. If the layout is not carefully done, the regulator shows stability problems as well as
EMI problems. Therefore, use wide and short traces for the main current paths, as indicated in bold in Figure 16.
The input capacitor, as well as the inductor and output capacitor, should be placed as close as possible to the IC
pins. In particular, the input capacitor needs to be placed as close as possible to the IC pins, directly across the
Vin and GND pin. The feedback resistor network must be routed away from the inductor and switch node to
minimize noise and magnetic interference. To further minimize noise from coupling into the feedback network
and feedback pin, the ground plane or ground traces must be used for shielding. This becomes important
especially at high switching frequencies of 1.25 MHz.
Figure 16. Layout Diagram
Figure 17. LI-Ion to 3.3 V Conversion
Figure 18. LI-Ion to 2.5 V Conversion
16
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| TPS6222 | 400-mA, 1.25-MHz, HIGH-EFFICIENCY, STEP-DOWN CONVERTER IN THIN-SOT23 |
| TPS62228DDC | 400-mA, 1.25-MHz, HIGH-EFFICIENCY, STEP-DOWN CONVERTER IN THIN-SOT23 |
| TPS62304DRC | 500-mA, 3-MHz SYNCHRONOUS STEP-DOWN CONVERTER IN CHIP SCALE PACKAGING |
相關代理商/技術參數 |
參數描述 |
|---|---|
| TPS62222DDCR | 功能描述:直流/直流開關調節器 1.8V Out 400mA Step-Down Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS62222DDCRG4 | 功能描述:直流/直流開關調節器 1.8V Out 400mA Step-Down Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS62222DDCT | 功能描述:直流/直流開關調節器 1.8V Out 400mA Step-Down Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS62222DDCTG4 | 功能描述:直流/直流開關調節器 1.8V Out 400mA Step-Down Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS62223DDCR | 功能描述:直流/直流開關調節器 2.3V Out 400mA Step-Down Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
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