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參數(shù)資料
| 型號(hào)： | REG104FA-2.7/500 |
| 元件分類： | 固定正電壓?jiǎn)温份敵鯨DO穩(wěn)壓器 |
| 英文描述： | 2.7 V FIXED POSITIVE LDO REGULATOR, 0.46 V DROPOUT, PSSO5 |
| 封裝： | D2PAK-5 |
| 文件頁(yè)數(shù)： | 4/14頁(yè) |
| 文件大?。?/td> | 246K |
| 代理商： | REG104FA-2.7/500 |
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SBVS025A
REG104
12
FIGURE 9. Maximum Power Dissipation versus Ambient
Temperature for the Various Packages and PCB
Heat Sink Configurations.
POWER DISSIPATION
The REG104 is available in two different package configu-
rations. The ability to remove heat from the die is different
for each package type and, therefore, presents different
considerations in the Printed Circuit-Board (PCB) layout.
The PCB area around the device that is free of other
components moves the heat from the device to the ambient
air. While it is difficult-to-impossible to quantify all of the
variables in a thermal design of this type, performance data
for several configurations are shown in Figure 9. In all cases
the PCB copper area is bare copper, free of solder resist
mask, and not solder plated. All examples are for 1-ounce
copper. Using heavier copper will increase the effectiveness
in moving the heat from the device. In those examples where
there is copper on both sides of the PCB, no connection has
been provided between the two sides. The addition of plated
through holes will improve the heat sink effectiveness.
Power dissipation depends on input voltage and load condi-
tions. Power dissipation is equal to the product of the
average output current times the voltage across the output
element, VIN to VOUT voltage drop.
PV
V
I
D
IN
OUT
OUT AVG
=
(–
)
()
Power dissipation can be minimized by using the lowest
possible input voltage necessary to assure the required
output voltage.
5
4
3
2
1
0
Power
Dissipation
(Watts)
0
25
50
75
125
100
Ambient Temperature (
°C)
CONDITIONS
#1
#2
#3
#4
CONDITION
PACKAGE
PCB AREA
THETA J-A
1
DDPAK
4in2 Top Side Only
27
°C/W
2
SOT-223
4in2 Top Side Only
53
°C/W
3
DDPAK
None
65
°C/W
4
SOT-223
0.5in2 Top Side Only
110
°C/W
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| REG104GA-2.7G4 | 2.7 V FIXED POSITIVE LDO REGULATOR, 0.4 V DROPOUT, PDSO6 |
| REG1117FA | ADJUSTABLE POSITIVE LDO REGULATOR, 1.55 V DROPOUT, PSSO3 |
| REG1117TR | ADJUSTABLE POSITIVE LDO REGULATOR, 1.2 V DROPOUT, PDSO4 |
| REG1118-2.85/2K5G4 | 2.85 V FIXED POSITIVE LDO REGULATOR, 1.3 V DROPOUT, PDSO4 |
| REG1118-2.85G4 | 2.85 V FIXED POSITIVE LDO REGULATOR, 1.3 V DROPOUT, PDSO4 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| REG104FA-3 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| REG104FA-3.3 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| REG104FA-3.3/500 | 功能描述:低壓差穩(wěn)壓器 - LDO DMOS 1A LDO Reg RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| REG104FA-3.3/500G3 | 功能描述:低壓差穩(wěn)壓器 - LDO DMOS 1A LDO Reg RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| REG104FA-3.3/KTTT | 制造商:TI 制造商全稱:Texas Instruments 功能描述:DMOS 1A Low-Dropout Regulator |
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