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參數(shù)資料
| 型號： | AAT1147 |
| 廠商： | Advanced Analog Technology,lnc. |
| 英文描述： | High Efficiency, Low Noise, Fast Transient 400mA Step-Down Converter |
| 中文描述： | 高效率，低噪聲，快速瞬態(tài)400mA的降壓轉(zhuǎn)換器 |
| 文件頁數(shù)： | 12/19頁 |
| 文件大?。?/td> | 620K |
| 代理商： | AAT1147 |
The maximum output capacitor RMS ripple current
is given by:
Dissipation due to the RMS current in the ceramic
output capacitor ESR is typically minimal, resulting in
less than a few degrees rise in hot-spot temperature.
Output Resistor Selection
The output voltage of the AAT1147 0.6V version can
be externally programmed. Resistors R1 and R2 of
Figure 5 program the output to regulate at a voltage
higher than 0.6V. To limit the bias current required for
the external feedback resistor string while maintain-
ing good noise immunity, the minimum suggested
value for R2 is 59k
Ω
. Although a larger value will fur-
ther reduce quiescent current, it will also increase
the impedance of the feedback node, making it more
sensitive to external noise and interference. Table 2
summarizes the resistor values for various output
voltages with R2 set to either 59k
Ω
for good noise
immunity or 221k
Ω
for reduced no load input current.
R1 = V
·
R2 = 0.6V
·
59k
Ω
= 88.5k
Ω
REF
V
OUT
1.5V
1
2
3
V
OUT
· (V
IN(MAX)
- V
OUT
)
L
·
F
S
·
V
IN(MAX)
RMS(MAX)
I
=
·
·
AAT1147
High Efficiency, Low Noise, Fast Transient
400mA Step-Down Converter
12
1147.2006.05.1.0
Figure 2: AAT1147 Evaluation Board
Top Side.
Figure 3: Exploded View of Evaluation
Board Top Side Layout.
Figure 4: AAT1147 Evaluation Board
Bottom Side.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AAT1147IJS-0.6-DB1 | 制造商:Skyworks Solutions Inc 功能描述:Evaluation Board for AAT1147 High Efficiency Step-Down Converter |
| AAT1147IJS-0.6-T1 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:High Efficiency, Low Noise, Fast Transient 400mA Step-Down Converter |
| AAT1149 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:3MHz Fast Transient 400mA Step-Down Converter |
| AAT1149_08 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:3MHz Fast Transient 400mA Step-Down Converter |
| AAT1149A | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:2.2MHz Fast Transient 400mA Step-Down Converter |
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