參數(shù)資料
型號(hào)： TPS62000YEGR
廠(chǎng)商： Texas Instruments, Inc.
元件分類(lèi)： DC/DC變換器
英文描述： HIGH-EFFICIENCY STEP-DOWN LOW POWER DC-DC CONVERTER
中文描述： 高效率降壓型小功率DC - DC變換器
文件頁(yè)數(shù)： 17/25頁(yè)
文件大?。?/td> 475K
代理商： TPS62000YEGR
SLVS294C SEPTEMBER 2000 REVISED SEPTEMBER 2003
17
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
output capacitor selection (continued)
If an output capacitor is selected with an ESR value
≤
120 m
, its RMS ripple current rating always meets the
application requirements. Just for completeness, the RMS ripple current is calculated as:
I
RMS(C
o
)
VO
1–
VO
VI
L
1
2
3
The overall output ripple voltage is the sum of the voltage spike caused by the output capacitor ESR plus the
voltage ripple caused by charge and discharging the output capacitor:
VO
VO
1–
VO
VI
L
1
8
Co
ESR
Where the highest output voltage ripple occurs at the highest input voltage V
I
.
Table 2. Tested Capacitors
CAPACITOR VALUE
10
μ
F
ESR/m
50
COMPONENT SUPPLIER
COMMENTS
Taiyo Yuden
JMK316BJ106KL
Ceramic
47
μ
F
68
μ
F
100
Sanyo 6TPA47M
POSCAP
100
Spraque
594D686X0010C2T
Tantalum
input capacitor selection
Because of the nature of the buck converter having a pulsating input current, a low ESR input capacitor is
required for best input voltage filtering and minimizing the interference with other circuits caused by high input
voltage spikes.
The input capacitor should have a minimum value of 10
μ
F and can be increased without any limit for better input
voltage filtering.
The input capacitor should be rated for the maximum input ripple current calculated as:
I
RMS
IO(max)
VO
VI
1–
VO
VI
The worst case RMS ripple current occurs at D = 0.5 and is calculated as:
I
RMS
I
O
2
.
Ceramic capacitor show a good performance because of their low ESR value, and they are less sensitive
against voltage transients compared to tantalum capacitors.
Place the input capacitor as close as possible to the input pin of the IC for best performance.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPS62000YEGT 功能描述:開(kāi)關(guān)變換器、穩(wěn)壓器與控制器 Adj 600mA Hi-Eff 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(kāi)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
TPS62000YZGR 功能描述:開(kāi)關(guān)變換器、穩(wěn)壓器與控制器 Adj 600-mA 95% Eff 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(kāi)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
TPS62000YZGT 功能描述:開(kāi)關(guān)變換器、穩(wěn)壓器與控制器 Adj 600-mA 95% Eff Step-Down Conv 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(kāi)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
TPS62001DGS 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)器 0.9V Out 600mA Step-Down Con 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
TPS62001DGSG4 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)器 0.9V Out 600mA Step-Down Con 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
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