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參數(shù)資料
| 型號(hào)： | AAT1149 |
| 廠商： | Advanced Analog Technology,lnc. |
| 英文描述： | 3MHz Fast Transient 400mA Step-Down Converter |
| 中文描述： | 3MHz的快速瞬態(tài)400mA的降壓轉(zhuǎn)換器 |
| 文件頁數(shù)： | 1/20頁 |
| 文件大?。?/td> | 1800K |
| 代理商： | AAT1149 |
AAT1149
3MHz Fast Transient
400mA Step-Down Converter
1149.2006.11.1.0
1
SwitchReg
General Description
The AAT1149 SwitchReg is a 3.0MHz step-down
converter with an input voltage range of 2.7V to
5.5V and output voltage as low as 1.0V. It is opti-
mized to react quickly to load variations and oper-
ate with a tiny 0603 inductor that is only 1mm tall.
The AAT1149 output voltage is programmable via
external feedback resistors. It can deliver 400mAof
load current while maintaining a low 45
μ
A no load
quiescent current. The 3.0MHz switching frequen-
cy minimizes the size of external components while
keeping switching losses low.
The AAT1149 maintains high efficiency throughout
the operating range, which is critical for portable
applications.
The AAT1149 is available in a Pb-free, space-saving
2.0x2.1mm SC70JW-8 package and is rated over
the -40°C to +85°C temperature range.
Features
Ultra-Small 0603 Inductor (Height = 1mm)
V
IN
Range: 2.7V to 5.5V
V
OUT
Adjustable from 1.0V to V
IN
400mA Max Output Current
Up to 98% Efficiency
45
μ
A No Load Quiescent Current
3.0MHz Switching Frequency
70
μ
s Soft Start
Fast Load Transient
Over-Temperature Protection
Current Limit Protection
100% Duty Cycle Low-Dropout Operation
<1
μ
A Shutdown Current
SC70JW-8 Package
Temperature Range: -40°C to +85°C
Applications
Cellular Phones
Digital Cameras
Handheld Instruments
Microprocessor / DSP Core / IO Power
PDAs and Handheld Computers
USB Devices
Typical Application
L1 1.8μH
C1
4.7μF
R1
118k
R2
59k
V
OUT
= 1.8V
V
IN
= 3.6V
C2
4.7μF
EN
FB
IN
LX
AGND
PGND
PGND
PGND
AAT1149
U1
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AAT1149_08 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:3MHz Fast Transient 400mA Step-Down Converter |
| AAT1149A | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:2.2MHz Fast Transient 400mA Step-Down Converter |
| AAT1149AIUV-1.875-T1 | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 2.2MHz Fast Trans 400mA StepDown 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(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 |
| AAT1149B | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:2.2MHz Fast Transient 400mA Step-Down Converter |
| AAT1149BIUV-1.8-T1 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:2.2MHz Fast Transient 400mA Step-Down Converter |
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