PRODUCT DATASHEET
AAT3183
ChargePump
TM
300mA Inductorless Step-Down Converter
Features
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V
IN
Range: 2.7V to 5.5V
V
OUT
: 1.5V and 1.34V
300mA Maximum Output Current
Ultra-Small Solution for Portable Applications
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Small Footprint
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Only Three External Ceramic Capacitors Required
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No Inductor
High Efficiency over the Output Current Range
Excellent Transient Performance
35µA Typical Quiescent Current
<1.0µA Shutdown Current
Up to 2MHz Switching Frequency
Integrated Soft-Start
Short-Circuit and Thermal Protection
2.0x2.1mm SC70JW-8 Package
-40°C to 85°C Temperature Range
General Description
The AAT3183 is a high efficiency step-down charge pump
converter providing up to 300mA of output current. The
1/2x (gain) charge pump converter topology provides
enhanced efficiency over conventional LDO regulators
and requires only three low cost ceramic capacitors. No
inductor is required; saving space and cost when com-
pared to inductive switching regulators.
The AAT3183 typically consumes 35µA of no load (zero
output current) quiescent current, making it ideal for
portable battery powered systems. Shutdown current is
less than 1µA.
The AAT3183 soft-start prevents excessive inrush cur-
rent while providing monotonic turn-on characteristics.
The device includes integrated short-circuit and over-
temperature (thermal) protection to safeguard system
components.
The AAT3183 is available in a Pb-free 2.0x2.1mm
SC70JW-8 package. Operating temperature range is
-40°C to +85°C.
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Applications
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Camcorders
Digital Still Cameras
DSP Core Supplies
PDAs, Handheld Devices, Notebook PCs
Smart Phones
Typical Application
C
FLY
1µF
C1-
V
IN
C
IN
1µF
IN
C1+
OUT
V
OUT
AAT3183
C
OUT
4.7µF
V
ENABLE
EN
GND
3183.2008.02.1.3
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