AAT1299
Low Voltage 2MHz Step-Up DC/DC Converter
™
SwitchReg
General Description
Features
The AAT1299 is a high efficiency, synchronous,
fixed frequency, step-up converter with start-up
inrush current limit and short-circuit protection. The
input voltage ranges from 1.0V to the output voltage.
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200mA Output from a 1.8V Input
VIN Operation Range: 1.0V to VOUT
Up to 93% Efficiency
Low Start-Up Voltage: 1.0V Typical
Internal Synchronous Rectifier
Current Mode Control with Internal Feedback
and Compensation
2MHz Fixed Switching Frequency
1A Current Limit
Maintains High Efficiency Over the Output
Current Range for Improved Battery Life
Low 40µA No Load Bias Current
Short-Circuit and Over-Current Protection
Inrush Current Limit and Soft Start
Low Shutdown Current: <1.0µA
-40°C to +85°C Temperature Range
2.0x2.1mm SC70JW-8 or 2.2x2.2mm 10-pin
STDFN Package or Die
The high 2MHz switching frequency and completely
integrated control circuitry minimize the total solution
footprint area while maintaining excellent regulation,
ripple, and transient response throughout the full
load range.
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Light load switching frequency modulation and low
quiescent current maintain high efficiency perform-
ance for light load and sleep mode conditions.
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With a 1A peak switch current limit, the AAT1299 is
capable of delivering 200mA to the load from a
1.8V input.
The AAT1299 is available in a Pb-free, space-sav-
ing 2.0x2.1mm 8-pin SC70JW or 2.2x2.2mm 10-
pin STDFN package, or in die form and is rated
over the -40°C to +85°C temperature range.
Applications
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Bluetooth™ Headsets
Digital Cameras
Medical Instruments
Mobile Handsets
MP3 and Portable Music Players
Typical Application
VIN
VOUT
AAT1299
2.2μH
LX
VCC
OUT
GND
VIN
EN
4.7μF
4.7μF
1299.2007.06.1.0
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