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參數(shù)資料
| 型號(hào)： | AAT1112ITP-0.6-T1 |
| 廠商： | Advanced Analog Technology,lnc. |
| 英文描述： | 1.5A, 1.4MHz Step-Down Converter |
| 中文描述： | 1.5A的，1.4MHz的降壓轉(zhuǎn)換器 |
| 文件頁(yè)數(shù)： | 1/20頁(yè) |
| 文件大小： | 828K |
| 代理商： | AAT1112ITP-0.6-T1 |
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AAT1112
1.5A, 1.4MHz Step-Down Converter
1112.2007.01.1.1
1
SwitchReg
General Description
The AAT1112 SwitchReg is a 1.5A step-down con-
verter with an input voltage range of 2.4V to 5.5V
and an adjustable output voltage from 0.6V to V
IN
.
The 1.4MHz switching frequency enables the use
of small external components. The small footprint
and high efficiency make the AAT1112 an ideal
choice for portable applications.
The AAT1112 delivers 1.5Amaximum output current
while consuming only 42μA of no-load quiescent
current. Ultra-low R
DS(ON)
integrated MOSFETs and
100% duty cycle operation make the AAT1112 an
ideal choice for high output voltage, high current
applications which require a low dropout threshold.
The AAT1112 provides excellent transient
response and high output accuracy across the
operating range. No external compensation com-
ponents are required.
The AAT1112 is designed to maintain high efficien-
cy throughout the load range. Pulling the MODE/
SYNC pin high enables "PWM Only" mode, main-
taining constant frequency and low output ripple
across the operating range. Alternatively, the con-
verter may be synchronized to an external clock
input via the MODE/SYNC pin. Over-temperature
and short-circuit protection safeguard the AAT1112
and system components from damage.
The AAT1112 is available in a Pb-free, space-sav-
ing TDFN33-12 or 2.75x3mm TSOPJW-12 pack-
age. The product is rated over an operating tem-
perature range of -40°C to +85°C.
Features
1.5A Maximum Output Current
Input Voltage: 2.4V to 5.5V
Output Voltage: 0.6V to V
IN
Up to 95% Efficiency
42μA No Load Quiescent Current
No External Compensation Required
1.4MHz Switching Frequency
Synchronizable to External Clock
Optional "PWM Only" Low Noise Mode
100% Duty Cycle Low-Dropout Operation
Internal Soft Start
Over-Temperature and Current Limit
Protection
<1μA Shutdown Current
TSOPJW-12 or TDFN33-12 Package
Temperature Range: -40°C to +85°C
Applications
Cellular Phones
Digital Cameras
Hard Disk Drives
MP3 Players
PDAs and Handheld Computers
Portable Media Players
USB Devices
Typical Application
VP
GND
PGND
LX
FB
V
OUT
= 3.3V
V
IN
C
10μF
2
C
22μF
1
L
3.3μH
1
EN
R
267k
Ω
1
R
59k
Ω
2
VIN
AAT1112
MODE/SYNC
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