AAT2514_08 Datasheet, PDF (1/14 Pages) Advanced Analogic Technologies – Dual Channel 600mA Step-Down Converter

SwitchReg^TM
PRODUCT DATASHEET
AAT2514
Dual Channel 600mA Step-Down Converter
General Description
The AAT2514 SwitchReg™ is a dual channel current mode
PWM DC-DC step-down converter operating at 1.5MHz
constant frequency. The device is ideal for portable equip-
ment requiring two separate power supplies that need
high current up to 600mA. The device operates from
single-cell Lithium-ion batteries while still achieving over
96% efficiency. The AAT2514 also can run at 100% duty
cycle for low dropout operation, extending battery life in
portable systems while light load operation provides very
low output ripple for noise sensitive applications.
The device has a unique adaptive slope compensation
scheme that makes it possible to operate with a lower
range of inductor values to optimize size and provide
efficient operation. The 1.5MHz switching frequency
minimizes the size of external components while keeping
switching losses low. The AAT2514 can operate from a
2.5V to 5.5V input voltage and can supply up to 600mA
output current for each channel.
The AAT2514 is available in a Pb-free 3 x 3mm 10-lead
TDFN package and operates over the -40°C to +85°C
temperature range.
Features
• V_IN Range:2.5V to 5.5V
• Up to 600mA Output Current
• High Efficiency: Up to 96%
• 1.5MHz Constant Frequency Operation
• 100% Duty Cycle Dropout Operation
• Low R_DS(ON) Internal Switches: 0.35Ω
• Current Mode Operation for Excellent Line and Load
Transient Response
• Adaptive Slope Compensation
• Soft Start
• Short-Circuit and Thermal Fault Protection
• <1μA Shutdown Current
• Power-On Reset Output
• Small, Thermally Enhanced TDFN33 -10 Package
• -40°C to +85°C Temperature Range
Applications
• Cellular Telephones
• Digital Still Cameras
• PDAs
• Portable Media Players
• Wireless and DSL Modems
Typical Application
VIN 2.5V to 5.5V
V_OUT2 2.5V
C1
10μF
L2 2.2μH
EN1
EN2
POR
IN
AAT2514
LX 2
LX1
R5
100kΩ
RESET
L1 2.2μH
VOUT1 1.8V
C3
10μF
R4
1MΩ
FB2
R3
316kΩ
GND
FB1
R1
316kΩ
R2
634kΩ
C2
10μF
2514.2008.02.1.1
www.analogictech.com
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