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參數(shù)資料
| 型號： | TPS62229DDC |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 0.88 A SWITCHING REGULATOR, 1850 kHz SWITCHING FREQ-MAX, PDSO5 |
| 封裝： | PLASTIC, TSOT-23, 5 PIN |
| 文件頁數(shù)： | 8/24頁 |
| 文件大?。?/td> | 664K |
| 代理商： | TPS62229DDC |
Layout Considerations
VI
GND
EN
SW
FB
C1
4.7
F
L1
4.7
H
C2
10
F
TPS62220
VI
2.5 V 6 V
VO
1.8 V / 400 mA
R1
R2
C1
C2
Typical Applications
VI
GND
EN
SW
FB
C3
10
F
L1
10
H
C4
10
F
TPS62220
VI
3.6 V to 6 V
VO
3.3 V/400 mA
R1
680 k
R2
120 k
C1
10 pF
C2
150 pF
1
2
3
5
4
VI
GND
EN
SW
FB
C3
4.7
F
L1
10
H
C4
10
F
TPS62220
VI
2.7 V to 6 V
VO
2.5 V/400 mA
R1
510 k
R2
130 k
C1
15 pF
C2
150 pF
1
2
3
5
4
SLVS491E – SEPTEMBER 2003 – REVISED FEBRUARY 2009....................................................................................................................................... www.ti.com
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
Copyright 2003–2009, Texas Instruments Incorporated
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS62229DDCR | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 1.7V Out 400mA Step-Down Converter RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| TPS62229DDCRG4 | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 1.7V Out 400mA Step-Down Converter RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| TPS62229DDCT | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 1.7V Out 400mA Step-Down Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)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(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS62229DDCTG4 | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 1.7V Out 400mA 95% Eff Step-Down Cnvrtr RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)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(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS62230DRYR | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 3 MHz Ultra Small Step Down Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)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(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
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