AAT3183_08 Datasheet, PDF (1/15 Pages) Advanced Analogic Technologies – 300mA Inductorless Step-Down Converter

ChargePump^TM
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.
PRODUCT DATASHEET
AAT3183
300mA Inductorless Step-Down Converter
Features
• 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
▪ 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
• -40°C to 85°C 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
3183.2008.02.1.3
www.analogictech.com
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