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參數資料
| 型號： | AAT1142ITP-1.8-T1 |
| 廠商： | Advanced Analog Technology,lnc. |
| 英文描述： | 800mA Voltage-Scaling Step-Down Converter |
| 中文描述： | 800mA的電壓縮放降壓轉換器 |
| 文件頁數： | 19/22頁 |
| 文件大小： | 982K |
| 代理商： | AAT1142ITP-1.8-T1 |
Since R
DS(ON)
, quiescent current, and switching
losses all vary with input voltage, the total losses
should be investigated over the complete input
voltage range.
Given the total losses, the maximum junction tem-
perature can be derived from the
θ
JA
for the
TSOPJW-12 package which is 160°C/W.
Layout
The suggested PCB layout for the AAT1142 in a
TSOPJW-12 package is shown in Figures 7 and 8.
The following guidelines should be used to help
ensure a proper layout.
1. The input capacitor (C2) should connect as
closely as possible to VIN (Pin 12) and PGND
(Pin 2).
2. C1 and L1 should be connected as closely as
possible. The connection of L1 to the LX pin
(Pin 1) should be as short as possible.
3. The feedback pin (Pin 7) should be separate
from any power trace and connected close to the
VOUT terminal. Sensing along a high-current
load trace will degrade VOUT load regulation.
4. The resistance of the trace from the GND ter-
minal to PGND (Pin 2) should be kept to a min-
imum. This will help to minimize any error in DC
regulation due to differences in the potential of
the internal signal ground and the power
ground.
5. Connect unused signal pins to ground to avoid
unwanted noise coupling. When using S
2
Cwire,
connect SDA and SCL to ground to disable I
2
C
functionality.
6. When using the TDFN33-12 package, connect
the exposed paddle (EP) to the GND plane.
T
J(MAX)
=
P
TOTAL
·
Θ
JA
+ T
AMB
AAT1142
800mA Voltage-Scaling Step-Down Converter
1142.2006.07.1.0
19
Figure 7: AAT1142 Evaluation Board
Top Side Layout (TSOPJW-12 Package).
Figure 8: AAT1142 Evaluation Board
Bottom Side Layout (TSOPJW-12 Package).
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相關代理商/技術參數 |
參數描述 |
|---|---|
| AAT1142ITP-T1 | 功能描述:開關變換器、穩(wěn)壓器與控制器 800mA Volt. Scaling Step-Down Converter 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 |
| AAT1142IWP-1.8-T1 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:800mA Voltage-Scaling Step-Down Converter |
| AAT1143 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:1MHz 400mA Step-Down Converter |
| AAT1143_06 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:1MHz 400mA Step-Down Converter |
| AAT1143IJS-0.6-T1 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:1MHz 400mA Step-Down Converter |
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