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參數(shù)資料
| 型號(hào)： | 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(zhuǎn)換器 |
| 文件頁(yè)數(shù)： | 12/22頁(yè) |
| 文件大小： | 982K |
| 代理商： | AAT1142ITP-1.8-T1 |
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Applications Information
The AAT1142 output voltage may be programmed
from 0.6V to 2.0V through I
2
C or S
2
Cwire serial
interface. When using I
2
C or S
2
Cwire, the output
voltage can be programmed across the entire out-
put voltage range or in increments as small as
±50mV (see Figure 2).
I
2
C Serial Interface
The AAT1142 is compatible with the I
2
C interface,
which is a widely used two-line serial interface.
The I
2
C two-wire communications bus consists of
SDA and SCL lines. SDA provides data, while SCL
provides clock input. SDA data consists of an
address bit sequence followed by a data bit
sequence. SDA data transfer is synchronized to
SCL rising clock edges.
When using the I
2
C interface, EN/SET is pulled
high to enable the output or low to disable the out-
put. To ensure a disable event, the EN/SET pulse
width must be greater than the latch time (500μs
maximum).
The I
2
C serial interface requires a master to initiate
all the communications with slave devices. The I
2
C
protocol is a bidirectional bus allowing both read and
write actions to take place; while the AAT1142 is a
slave device and only supports the write protocol.
The AAT1142 is a receiver-only (or write-only)
slave device and the Read / Write (R/W) bit is set
low. The AAT1142 address is preset to 0x14 (Hex).
I
2
C START and STOP Conditions
START and STOP conditions are initialized by the
I
2
C bus master. The master determines the START
(beginning) and STOP (end) of a transfer with the
slave device. Prior to initiating a START or after
STOP, both the SDA and SCL lines are in bus-free
mode. Bus-free mode is when SDA and SCL are
both in the high state (see Figure 3).
AAT1142
800mA Voltage-Scaling Step-Down Converter
12
1142.2006.07.1.0
Figure 1: AAT1142 Evaluation Board Schematic.
C1
4.7μF
V
OUT
LX
U1 AAT1142 TSOPJW-12
L1 CDRH2D14/2R2
C1 4.7μF 10V 0805 X5R
C2 10μF 10V 0805 X5R
C3 10μF optional
C4 0.1μF optional
R1 0
Ω
0603
R2 optional 0603
R3 10K 0603
R4, R5 1.8K 0603
V
IN
V
IN
V
IN
V
IN
V
IN
LX
1
PGND
2
MODE/SYNC
3
SDA
4
SCL
5
EN/SET
6
FB
7
AGND
8
AGND
9
AGND
10
AGND
11
VIN
12
AAT1142
TSOPJW-12
U1
SDA
SCL
1
2
JP1
1
2
3
JP3
C3
(optional)
10μF
C4
(optional)
0.1μF
(optional)
C2
10μF
R5
1.8K
R4
1.8K
L1
2.2μH
R3
10K
0
R1
R2
(optional)
1
2
JP2
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AAT1142ITP-T1 | 功能描述:開(kāi)關(guān)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(kāi)關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)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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