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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)： | 8/19頁 |
| 文件大?。?/td> | 620K |
| 代理商： | AAT1147 |
AAT1147
High Efficiency, Low Noise, Fast Transient
400mA Step-Down Converter
8
1147.2006.05.1.0
Functional Block Diagram
EN
LX
Err
A.
Logic
DH
DL
PGND
VIN
AGND
Voltage
Reference
INPUT
OUT
Functional Description
The AAT1147 is a high performance 400mA
1.4MHz monolithic step-down converter. It has
been designed with the goal of minimizing external
component size and optimizing efficiency at heavy
load. Apart from the small bypass input capacitor,
only a small L-C filter is required at the output.
Typically, a 4.7μH inductor and a 4.7μF ceramic
capacitor are recommended (see table of values).
Only three external power components (C
IN
, C
OUT
,
and L) are required. Output voltage is programmed
with external resistors and ranges from 0.6V to the
input voltage. An additional feed-forward capacitor
can also be added to the external feedback to pro-
vide improved transient response (see Figure 1).
At dropout, the converter duty cycle increases to
100% and the output voltage tracks the input volt-
age minus the R
DS(ON)
drop of the P-channel high-
side MOSFET.
The input voltage range is 2.7V to 5.5V. The con-
verter efficiency has been optimized for heavy load
conditions up to 400mA.
The internal error amplifier and compensation pro-
vide excellent transient response, load, and line
regulation. Soft start eliminates any output voltage
overshoot when the enable or the input voltage is
applied.
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相關(guān)代理商/技術(shù)參數(shù) |
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| 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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