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參數(shù)資料
| 型號： | AAT1141IGV-0.6-T1 |
| 廠商： | Advanced Analogic Technologies, Inc. |
| 英文描述： | Fast Transient 600mA Step-Down Converter |
| 中文描述： | 快速的瞬時600mA降壓轉換器 |
| 文件頁數(shù)： | 15/19頁 |
| 文件大?。?/td> | 951K |
| 代理商： | AAT1141IGV-0.6-T1 |
AAT1141
Fast Transient 600mA Step-Down Converter
SwitchReg
TM
PRODUCT DATASHEET
1141.2007.12.1.3
15
w w w . a n a l o g i c t e c h . c o m
Efficiency
Besides the AAT1141 device losses including switching
losses, conduction losses, and quiescent current losses,
the inductor copper loss also affects the efficiency of the
buck converter. To the buck converter, the average cur-
rent of the inductor is equal to output current I
O
. So the
loss in the inductor is:
P
LOSS_L
=
I
O2
·
R
L
Table 4 shows some recommended inductors. A larger size
inductor usually has smaller DCR. As a example: if select-
ing CDRH2D14 4.7
μ
H for 1.8V output, the P
Loss_L
is 48.6mW
when output current is 600mA, so the inductor loses 4.5%
power; if selecting CDRH3D23 4.7
μ
H, the P
Loss_L
should be
19.8mW, and the inductor losing power ratio is only 1.8%.
The inductor size and the buck converter efficiency is
always a trade-off in the real application.
Layout
The suggested 2-layer PCB layout for the AAT1141 is
shown in Figures 2, 3 and 4. The following guide lines
should be used to help ensure a proper layout.
1. The power traces (GND, LX, VIN) should be kept
short, direct, and wide to allow large current flow.
Place sufficient multiple-layer pads when needed to
change the trace layer.
2. The input capacitor (C1) should connect as closely
as possible to IN and GND.
3. The output capacitor C2 and L1 should be connected
as closely as possible. The connection of L1 to the LX
pin should be as short as possible and there should
not be any signal lines under the inductor.
4.
The feedback trace or OUT pin should be separate
from any power trace and connect as closely as pos-
sible to the load point. Sensing along a high-current
load trace will degrade DC load regulation. If external
feedback resistors are used, they should be placed as
closely as possible to the OUT pin to minimize the
length of the high impedance feedback trace.
5. The resistance of the trace from the load return to
GND should be kept to a minimum. This will help to
minimize any error in DC regulation due to differ-
ences in the potential of the internal signal ground
and the power ground.
相關PDF資料 |
PDF描述 |
|---|---|
| AAT1141IGV-1.8-T1 | Fast Transient 600mA Step-Down Converter |
| AAT1143 | Circular Connector; MIL SPEC:MIL-C-5015; Body Material:Metal; Series:GT; No. of Contacts:4; Connector Shell Size:22; Connecting Termination:Solder; Circular Shell Style:Square Flange Receptacle; Body Style:Straight |
| AAT1143IJS-0.6-T1 | Circular Connector; MIL SPEC:MIL-C-5015; Body Material:Metal; Series:GT; No. of Contacts:5; Connector Shell Size:24; Connecting Termination:Solder; Circular Shell Style:Square Flange Receptacle; Body Style:Straight |
| AAT1143IJS-1.2-T1 | GT 24C 24#16 SKT RECP |
| AAT1143IJS-1.5-T1 | GT 2C 2#4 SKT RECP WALL |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| AAT1141IGV-1.0-T1 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:Fast Transient 600mA Step-Down Converter |
| AAT1141IGV-1.2-T1 | 制造商:Skyworks Solutions Inc 功能描述:DC TO DC CONVERTER |
| AAT1141IGV-1.5-T1 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:Fast Transient 600mA Step-Down Converter |
| AAT1141IGV-1.8-T1 | 制造商:Skyworks Solutions Inc 功能描述:DC TO DC CONVERTER |
| AAT1141IGV-2.0-T1 | 功能描述:開關變換器、穩(wěn)壓器與控制器 Fast Trans 600mA Step-Down 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 |
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