參數(shù)資料
型號(hào)： TPS62221DDC
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(zhuǎn)換器薄，SOT23封裝
文件頁(yè)數(shù)： 16/20頁(yè)
文件大?。?/td> 464K
代理商： TPS62221DDC
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
相關(guān)PDF資料
PDF描述
TPS62222DDC 400-mA, 1.25-MHz, HIGH-EFFICIENCY, STEP-DOWN CONVERTER IN THIN-SOT23
TPS62229DDC 400-mA, 1.25-MHz, HIGH-EFFICIENCY, STEP-DOWN CONVERTER IN THIN-SOT23
TPS62223DDC 400-mA, 1.25-MHz, HIGH-EFFICIENCY, STEP-DOWN CONVERTER IN THIN-SOT23
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
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPS62221DDCR 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)器 1.5V Out 400mA Step-Down Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開(kāi)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
TPS62221DDCRG4 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)器 1.5V Out 400mA Step-Down Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開(kāi)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
TPS62221DDCT 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)器 1.5V Out 400mA Step-Down Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開(kāi)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
TPS62221DDCTG4 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)器 1.5V Out 400mA Step-Down Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開(kāi)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
TPS62221EVM-014 功能描述:電源管理IC開(kāi)發(fā)工具 TPS62221-014 Eval Mod RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類(lèi)型:Battery Management 工具用于評(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V
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