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參數(shù)資料
| 型號： | AAT1145IDE-0.6-T1 |
| 廠商： | Advanced Analogic Technologies, Inc. |
| 英文描述： | 1.2A Step-Down Converter |
| 中文描述： | 1.2A的降壓轉(zhuǎn)換器 |
| 文件頁數(shù)： | 1/16頁 |
| 文件大?。?/td> | 307K |
| 代理商： | AAT1145IDE-0.6-T1 |
AAT1145
1.2A Step-Down Converter
SwitchReg
TM
PRODUCT DATASHEET
1145.2007.11.1.1
1
w w w . a n a l o g i c t e c h . c o m
General Description
The AAT1145 SwitchReg is a 1.5MHz constant fre-
quency current mode PWM step-down converter. It is
ideal for portable equipment requiring very high current
up to 1.2A from single-cell Lithium-ion batteries while
still achieving over 90% efficiency during peak load con-
ditions. The AAT1145 also can run at 100% duty cycle
for low dropout operation, extending battery life in por-
table systems while light load operation provides very
low output ripple for noise sensitive applications.
The AAT1145 can supply up to 1.2A output load current
from a 2.5V to 5.5V input voltage and the output voltage
can be regulated as low as 0.6V. The high switching fre-
quency minimizes the size of external components while
keeping switching losses low. The internal slope compen-
sation setting allows the device to operate with smaller
inductor values to optimize size and provide efficient
operation.
The AAT1145 is available in adjustable (0.6V to V
IN
) and
fixed (1.8V) output voltage versions. The device is avail-
able in a Pb-free, 3x3mm 10-lead TDFN package and is
rated over the -40°C to +85°C temperature range.
Features
Input Voltage Range: 2.5V to 5.5V
Output Voltages from 0.6V to V
IN
1.2A Output Current
High Efficiency: Up to 95%
1.5MHz Constant Switching Frequency
Low R
DS(ON)
Internal Switches: 0.15
Ω
Allows Use of Ceramic Capacitors
Current Mode Operation for Excellent Line and Load
Transient Response
Short-Circuit and Thermal Fault Protection
Soft Start
Low Dropout Operation: 100% Duty Cycle
Low Shutdown Current: I
SHUTDOWN
< 1
μ
A
TDFN33-10 Package
-40°C to +85°C Temperature Range
Applications
Cellular Phones
Digital Cameras
DSP Core Supplies
PDAs
Portable Instruments
Smart Phones
Typical Application
PGND
PGND
LX
LX
EN
IN
AIN
AGND
OUT
AAT1145-1.8
C1
10μF
VIN 2.5V-5.5V
L1
2.2μH
C2
22μF
VOUT
1.8V,1.2A
1
2
3
4
5
7
8
9
10
AGND
6
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AAT1145IDE-1.8-T1 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:1.5A Step-Down Converter |
| AAT1146 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:Fast Transient 400mA Step-Down Converter |
| AAT1146_08 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:Fast Transient 400mA Step-Down Converter |
| AAT1146AIGV-0.6-T1 | 制造商:Skyworks Solutions Inc 功能描述:Voltage Regulators - Switching Regulators Fast Transient 400mA Buck Converter |
| AAT1146IGV-0.6-T1 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:Fast Transient 400mA Step-Down Converter |
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