參數(shù)資料
型號(hào)： TPS62205DBV
廠商： Texas Instruments, Inc.
元件分類(lèi)： DC/DC變換器
英文描述： HIGH-EFFICIENCY, SOT23 STEP-DOWN, DC-DC CONVERTER
中文描述： 高效率，采用SOT23降壓，DC - DC變換器
文件頁(yè)數(shù)： 14/17頁(yè)
文件大小： 280K
代理商： TPS62205DBV
www.ti.com
Vout
Vout
1–Vout
Vin
L
f
1
8
Cout
f
ESR
LAYOUT CONSIDERATIONS
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.
V
I
GND
EN
SW
FB
C1
4.7
μ
F
L1
10
μ
H
C2
10
μ
F
TPS62200
V
I
2.5 V 6 V
V
O
1.8 V / 300 mA
R1
R2
Cff
TPS62200, TPS62201
TPS62202, TPS62203, TPS62207
TPS62204, TPS62205, TPS62208
SLVS417D–MARCH 2002–REVISED MAY 2004
At nominal load current the device operates in PWM mode and the overall output voltage ripple is the sum of the
voltage spike caused by the output capacitor ESR plus the voltage ripple caused by charging and discharging the
output capacitor:
where the highest output voltage ripple occurs at the highest input voltage Vin.
At light load currents, the device operates in power save mode, and the output voltage ripple is independent of
the output capacitor value. The output voltage ripple is set by the internal comparator thresholds. The typical
output voltage ripple is 1% of the output voltage Vo.
Table 2. Recommended Capacitors
CAPACITOR VALUE
4.7 μF
10 μF
CASE SIZE
0805
0805
COMPONENT SUPPLIER
Taiyo Yuden JMK212BY475MG
Taiyo Yuden JMK212BJ106MG
TDK C12012X5ROJ106K
Taiyo Yuden JMK316BJ106KL
TDK C3216X5ROJ106M
Taiyo Yuden JMK325BJ226MM
COMMENTS
Ceramic
Ceramic
Ceramic
Ceramic
10 μF
1206
22 μF
1210
Ceramic
Therefore use wide and short traces for the main current paths, as indicated in bold in Figure 17. The input
capacitor, as well as the inductor and output capacitor, should be placed as close as possible to the IC pins
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 very important especially at high
switching frequencies of 1 MHz.
Figure 17. Layout Diagram
14
相關(guān)PDF資料
PDF描述
TPS62207DBV HIGH-EFFICIENCY, SOT23 STEP-DOWN, DC-DC CONVERTER
TPS62208DBV HIGH-EFFICIENCY, SOT23 STEP-DOWN, DC-DC CONVERTER
TPS62200DBV HIGH-EFFICIENCY, SOT23 STEP-DOWN, DC-DC CONVERTER
TPS62201DBV HIGH-EFFICIENCY, SOT23 STEP-DOWN, DC-DC CONVERTER
TPS62202DBV HIGH-EFFICIENCY, SOT23 STEP-DOWN, DC-DC CONVERTER
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPS62205DBVR 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)器 2.5V Out Hi-Eff 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
TPS62205DBVRG4 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)器 2.5V Out Hi-Eff 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
TPS62205DBVT 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)器 2.5V Out Hi-Eff 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
TPS62205DBVTG4 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)器 2.5V Out Hi-Eff 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
TPS62206DBVR 制造商:Rochester Electronics LLC 功能描述:- Bulk
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