Dual Channel 600mA Step-Down Converter
General Description
Features
AAT2514
SwitchReg
™
The AAT2514 SwitchReg™ is a dual channel cur-
rent mode PWM DC-DC step-down converter oper-
ating at 1.5MHz constant frequency. The device is
ideal for portable equipment 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 applica-
tions.
The device has a unique adaptive slope compen-
sation 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.
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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
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Cellular Telephones
Digital Still Cameras
PDAs
Portable Media Players
Wireless and DSL Modems
Typical Application
R5
100kΩ
POR
RESET
L1 2.2µH
V
OUT1
1.8V
EN1
V
IN
2.5V to 5.5V
V
OUT2
2.5V
C1
10µF
L2 2.2µH
EN2
IN
AAT2514
LX 2
LX1
C3
10µF
FB2
R4
1MΩ
R3
316kΩ
GND
FB1
R1
316kΩ
R2
634kΩ
C2
10µF
2514.2007.06.1.0
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ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
