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參數(shù)資料
| 型號： | AAT1149 |
| 廠商： | Advanced Analog Technology,lnc. |
| 英文描述： | 3MHz Fast Transient 400mA Step-Down Converter |
| 中文描述： | 3MHz的快速瞬態(tài)400mA的降壓轉(zhuǎn)換器 |
| 文件頁數(shù)： | 10/20頁 |
| 文件大?。?/td> | 1800K |
| 代理商： | AAT1149 |
AAT1149
3MHz Fast Transient
400mA Step-Down Converter
10
1149.2006.11.1.0
Functional Block Diagram
EN
LX
Err
A.
Logic
DH
DL
PGND
IN
AGND
Voltage
Reference
INPUT
FB
Functional Description
The AAT1149 is a high performance 400mA3.0MHz
monolithic step-down converter. It minimizes exter-
nal component size, enabling the use of a tiny 0603
inductor that is only 1mm tall, and optimizes effi-
ciency over the complete load range. Apart from the
small bypass input capacitor, only a small L-C filter
is required at the output. Typically, a 1.8
μ
H inductor
and a 4.7
μ
F 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 feedback resistors, ranging from 1.0V
to the input voltage. An additional feed-forward
capacitor can also be added to the external feed-
back to provide improved transient response (see
Figure 4).
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 all load
conditions, ranging from no load to 400mA.
The internal error amplifier and compensation pro-
vides 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) |
參數(shù)描述 |
|---|---|
| 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 |
| AAT1149AIUV-1.875-T1 | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 2.2MHz Fast Trans 400mA StepDown Cnvrt 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 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| AAT1149B | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:2.2MHz Fast Transient 400mA Step-Down Converter |
| AAT1149BIUV-1.8-T1 | 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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