參數(shù)資料
型號(hào): AAT1110
廠商: Advanced Analog Technology,lnc.
英文描述: Fast Transient 800mA Step-Down Converter
中文描述: 快速瞬態(tài)800mA的降壓轉(zhuǎn)換器
文件頁(yè)數(shù): 1/19頁(yè)
文件大?。?/td> 710K
代理商: AAT1110
AAT1110
Fast Transient 800mA Step-Down Converter
1110.2006.04.1.0
1
SwitchReg
General Description
The AAT1110 SwitchReg is a member of
AnalogicTech's Total Power Management IC
(TPMIC) product family. It is a 1.4MHz step-
down converter with an input voltage range of 2.7V
to 5.5V and output as low as 0.6V. Its low supply
current, small size, and high switching frequency
make the AAT1110 the ideal choice for portable
applications.
The AAT1110 is available in either a fixed version
with internal feedback or a programmable version
with external feedback resistors. It can deliver up
to 800mA of load current while maintaining a low
27μA no load quiescent current. The 1.4MHz
switching frequency minimizes the size of external
components while keeping switching losses low.
The AAT1110 feedback and control delivers excel-
lent load regulation and transient response with a
small output inductor and capacitor.
The AAT1110 is designed to maintain high efficien-
cy throughout the operating range and provides
fast turn-on time.
The AAT1110 is available in a space-saving
2.0x2.1mm SC70JW-8 package and is rated over
the -40°C to +85°C temperature range.
Features
V
IN
Range: 2.7V to 5.5V
V
OUT
Fixed or Adjustable from 0.6V to V
IN
27μA No Load Quiescent Current
Output Current Up to 800mA
1.4MHz Switching Frequency
120μs Soft Start
Fast Load Transient
Over-Temperature Protection
Current Limit Protection
100% Duty Cycle Low-Dropout Operation
<1μA of 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 (Fixed Output Voltage)
4.7
μ
H
L1
22
μ
F
C1
4.7
μ
F
C2
EN
1
OUT
2
VIN
3
LX
4
AGND
5
PGND
6
PGND
7
PGND
8
AAT1110
U1
V
IN
V
O
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