AAT1146 Datasheet PDF - AAT
| Part Number | AAT1146 | |
| Description | Step-Down Converter | |
| Manufacturers | AAT | |
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There is a preview and AAT1146 download ( pdf file ) link at the bottom of this page. Total 20 Pages | ||
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AAT1146
Fast Transient 400mA Step-Down Converter
General Description
Features
SwitchReg™
The AAT1146 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 voltage as low as 0.6V. It is
optimized to react quickly to a load variation.
The AAT1146 is available in fixed voltage versions
with internal feedback and a programmable ver-
sion with external feedback resistors. It can deliver
400mA 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 AAT1146 is designed to maintain high efficien-
cy throughout the operating range, which is critical
for portable applications.
• VIN Range: 2.7V to 5.5V
• VOUT Fixed or Adjustable from 0.6V to VIN
• 27μA No Load Quiescent Current
• Up to 98% Efficiency
• 400mA Max Output Current
• 1.4MHz Switching Frequency
• 120μs Soft Start
• Fast Load Transient
• Over-Temperature Protection
• Current Limit Protection
• 100% Duty Cycle Low-Dropout Operation
• <1μA Shutdown Current
• SC70JW-8 Package
• Temperature Range: -40°C to +85°C
The AAT1146 is available in a Pb-free, space-saving
Applications
2.0x2.1mm SC70JW-8 package and is rated over
the -40°C to +85°C temperature range.
• Cellular Phones
• Digital Cameras
•www.DataSheet4U.com Handheld Instruments
• Microprocessor / DSP Core / IO Power
• PDAs and Handheld Computers
• USB Devices
Typical Application (Fixed Output Voltage)
VIN
C2
4.7μF
U1
AAT1146
3 VIN
LX 4
1 EN
OUT 2
5 AGND PGND 7
8 PGND PGND 6
L1
4.7μH
VO
C1
4.7μF
1146.2006.04.1.3
1
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AAT1146
Fast Transient 400mA Step-Down Converter
Typical Characteristics
Efficiency vs. Load
(VOUT = 1.8V; L = 4.7μH)
100
VIN = 2.7V
90
80 VIN = 3.6V VIN = 4.2V
70
60
50
0.1
1 10 100
Output Current (mA)
1000
1.0
0.5
0.0
-0.5
-1.0
0.1
DC Regulation
(VOUT = 1.8V)
VIN = 4.2V
VIN = 3.6V
VIN = 2.7V
1 10 100 1000
Output Current (mA)
Efficiency vs. Load
(VOUT = 2.5V; L = 6.8μH)
100
VIN = 2.7V
90
80 VIN = 5.0V
VIN = 4.2V
70 VIN = 3.6V
60
50
0.1
1 10 100
Output Current (mA)
1000
1.0
0.5
0.0
-0.5
-1.0
0.1
DC Regulation
(VOUT = 2.5V)
VIN = 4.2V
VIN = 5.0V
VIN = 3.6V
VIN = 3.0V
1 10 100
Output Current (mA)
1000
Efficiency vs. Load
(VOUT = 3.3V; L = 6.8μH)
100
VIN = 3.6V
90
VIN = 4.2V
80
VIN = 5.0V
70
60
1.0
0.5
0.0
-0.5
50
0.1
-1.0
1 10 100 1000
0.1
Output Current (mA)
DC Regulation
(VOUT = 3.3V; L = 6.8µH)
VIN = 5.0V
VIN = 4.2V
VIN = 3.6V
1 10 100
Output Current (mA)
1000
1146.2006.04.1.3
5
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for AAT1146 electronic component. |
| Information | Total 20 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ AAT1146.PDF Datasheet ] | |
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