AAT3183 Datasheet, PDF (1/16 Pages) Advanced Analogic Technologies – 300mA Inductorless Step-Down Converter

AAT3183
300mA Inductorless Step-Down Converter
General Description
Features
ChargePump^™
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 conven-
tional LDO regulators and requires only three low
cost ceramic capacitors. No inductor is required;
saving space and cost when compared 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
current while providing monotonic turn-on charac-
teristics. The device includes integrated short-cir-
cuit 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 -40ºC to +85ºC.
• V_IN Range: 2.7V to 5.5V
• V_OUT: 1.5V
• 300mA Maximum Output Current
• Ultra-Small Solution for Portable Applications
— Small Footprint
— Only Three External Ceramic Capacitors
Required
— 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
• -40ºC to 85ºC Temperature Range
Applications
• Camcorders
• Digital Still Cameras
• DSP Core Supplies
• PDAs, Handheld Devices, Notebook PCs
• Smart Phones
Typical Application
V_IN
V_ENABLE
C_FLY
1μF
C1- C1+
IN
OUT
C_IN
1μF
AAT3183
EN
GND
V_OUT
C_OUT
4.7μF
3183.2007.07.1.2
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