AAT2514 Datasheet, PDF (1/16 Pages) Advanced Analogic Technologies – Dual Channel 600mA Step-Down Converter

AAT2514
Dual Channel 600mA Step-Down Converter
General Description
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.
Features
SwitchReg^™
• 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
V_IN 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
V_OUT1 1.8V
C3
10µF
R4
1MΩ
FB2
R3
316kΩ
GND
FB1
R1
316kΩ
R2
634kΩ
C2
10µF
2514.2007.06.1.0
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