AAT1143IJS-1.6-T1 Advanced Analogic Technologies, Inc., AAT1143IJS-1.6-T1 Datasheet
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AAT1143IJS-1.6-T1
Manufacturer Part Number
AAT1143IJS-1.6-T1
Description
Manufacturer
Advanced Analogic Technologies, Inc.
Specifications of AAT1143IJS-1.6-T1
Date_code
05+
Packing_info
SO70JW-8
Typical Application (Fixed Output Voltage)
4.7μF
General Description
The AAT1143 SwitchReg™ is a 1MHz step-down con-
verter 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 AAT1143 the
ideal choice for portable applications.
The AAT1143 is available in either a fixed version with
internal feedback or a programmable version with exter-
nal feedback resistors. It can deliver 400mA of load cur-
rent while maintaining a low 25μA no load quiescent
current. The 1MHz switching frequency minimizes the
size of external components while keeping switching
losses low. The AAT1143 feedback and control delivers
excellent load regulation and transient response with a
small output inductor and capacitor.
The AAT1143 is designed to maintain high efficiency
throughout the operating range, which is critical for por-
table applications.
The AAT1143 is available in a space-saving 2.0x2.1mm
SC70JW-8 package and is rated over the -40°C to +85°C
temperature range.
SwitchReg
1143.2009.02.1.11
C2
V
IN
TM
3
1
5
8
VIN
EN
AGND
PGND
U1
AAT1143
PGND
PGND
OUT
LX
4
2
7
6
4.7μH
L1
w w w . a n a l o g i c t e c h . c o m
V
O
C1
4.7μF
Features
• V
• V
• 25μA No Load Quiescent Current
• Up to 95% Efficiency
• 400mA Max Output Current
• 1MHz Switching Frequency
• Soft Start
• Over-Temperature Protection
• Current Limit Protection
• 100% Duty Cycle Low-Dropout Operation
• 0.1μA 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
▪
IN
OUT
Fixed or Adjustable Version
Range: 2.7V to 5.5V
Adjustable Down to 0.6V
1MHz 400mA Step-Down Converter
100
95
90
85
80
75
70
65
60
0.1
Efficiency vs. Load Current
PRODUCT DATASHEET
1
(V
OUT
Output Current (mA)
= 2.5V; V
AAT1143
10
IN
= 3.3V)
100
1000
1