AAT1151 Datasheet PDF - AAT
| Part Number | AAT1151 | |
| Description | DC/DC Converter | |
| Manufacturers | AAT | |
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AAT1151
850kHz 700mA Synchronous Buck DC/DC Converter
General Description
The AAT1151 SwitchReg™ is a member of
AnalogicTech's Total Power Management IC™
(TPMIC™) product family. The step-down switching
converter is ideal for applications where high effi-
ciency is required over the full range of output load
conditions. The 2.7V to 5.5V input voltage range
makes the AAT1151 ideal for single-cell lithium-
ion/polymer battery applications. Capable of more
than 700mA with internal MOSFETs, the current-
mode controlled IC provides high efficiency using
synchronous rectification. Fully integrated compen-
sation simplifies system design and lowers external
parts count.
The device operates at a fixed 850kHz switching fre-
quency and enters PFM mode for light load current
to maintain high efficiency across all load conditions.
The AAT1151 is available in MSOP-8 and QFN33-16
packages and is rated over the -40°C to +85°C tem-
perature range.
Features
SwitchReg™
• VIN Range: 2.7V to 5.5V
• Up to 95% Efficiency
• High Initial Accuracy ±1%
• 110mΩ RDS(ON) Internal Switches
• <1µA Shutdown Current
• 850kHz Switching Frequency
• Fixed VOUT or Adjustable VOUT ≥1.0V
• Integrated Power Switches
• Synchronous Rectification
• Current Mode Operation
• Internal Compensation
• Stable with Ceramic Capacitors
• PWM and PFM for Optimum Efficiency for All
Load Conditions
• Internal Soft Start
• Over-Temperature Protection
• Current Limit Protection
• MSOP-8 and QFN33-16 Packages
• -40°C to +85°C Temperature Range
Typical Application
www.DataSheet4U.com
Applications
• Cellular Phones
• Digital Cameras
• MP3 Players
• Notebook Computers
• PDAs
• USB-Powered Equipment
• Wireless Notebook Adapters
INPUT
10µF
100Ω
0.1µF
VP
AAT1151
FB
ENABLE
LX
VCC
SGND
PGND
3.0µH
2x 22µF
OUTPUT
1151.2005.11.1.4
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AAT1151
850kHz 700mA Synchronous Buck DC/DC Converter
Typical Characteristics
No Load Supply Current vs. Input Voltage
300
250 T = 85°C
200
150 T = -40°C
100
T = 25°C
50
0
2.5 3 3.5 4 4.5 5 5.5
Input Voltage (V)
890
880
870
860
850
2.5
Frequency vs. Input Voltage
3 3.5 4 4.5 5
Input Voltage (V)
5.5
Output Voltage vs. Temperature
1.794
1.792
1.79
1.788
1.786
1.784
1.782
1.78
-40
-20
0 20 40 60
Temperature (°C)
80 100
3.0
2.0
1.0
0.0
-1.0
-2.0
-3.0
1
Load and Line Regulation
VIN = 4.2V
VIN = 3.6V
VIN = 2.7V
10 100
Load Current (mA)
1000
Switching Frequency vs. Temperature
1200
1000
800
600
400
200
0
-40 -20 0 20 40 60 80 100
Temperature (°C)
100
95
90
85
80
75
70
65
60
55
50
1
AAT1151 Efficiency
(VOUT = 2.5V; L = 4.2µH)
10 100 1000
Output Current (mA)
10000
1151.2005.11.1.4
5
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for AAT1151 electronic component. |
| Information | Total 16 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ AAT1151.PDF Datasheet ] | |
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