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參數(shù)資料
| 型號： | AAT1142IWP-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 |
| 文件頁數(shù)： | 10/22頁 |
| 文件大小： | 982K |
| 代理商： | AAT1142IWP-1.8-T1 |
Functional Block Diagram
SCL
LX
Logic
DH
DL
PGND
AGND
PVIN
VIN
FB
SDA
EN/SET
MODE/SYNC
Control
Logic
Voltage
Reference
Err.
Amp.
AAT1142
800mA Voltage-Scaling Step-Down Converter
10
1142.2006.07.1.0
Functional Description
The AAT1142 is a high performance, 800mA step-
down converter with an input voltage range from
2.7V to 5.5V. The AAT1142 uses Dynamic Voltage
Management, which allows the system host to
quickly set the output voltage through the integrat-
ed I
2
C or S
2
Cwire interface. Through this interface,
the host can change the output voltage to track
processor idle and active states, greatly extending
battery life without degrading system performance.
I
2
C provides an industry-standard, dual-line inter-
face, while S
2
Cwire provides a single-line, high-
speed serial interface.
The 2.2MHz switching frequency allows the use of
small external components. Only three external
components are needed to program the output
from 0.6V to 2.0V. Typically, one 4.7μF capacitor,
one 10μF capacitor, and one 2.2μH inductor are
required.
The integrated low-loss MOSFET switches provide
up to 93% efficiency. PFM operation maintains
high efficiency under light load conditions (typically
<50mA). Pulling the MODE/SYNC pin high allows
optional PWM Only low noise mode. This main-
tains constant frequency and low output ripple
across all load conditions. Alternatively, the IC can
be synchronized to an external clock via the
MODE/SYNC input. External synchronization can
be maintained between 1MHz and 3MHz.
At low input voltages, the converter dynamically
adjusts the operating frequency prior to dropout to
maintain the required duty cycle and provide accu-
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| AAT1143IJS-1.5-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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