AAT2146W Datasheet, PDF (1/18 Pages) Skyworks Solutions Inc. – Low-Noise, Fast Transient 600mA Step-Down Converter

DATA SHEET
AAT2146W
Low-Noise, Fast Transient 600mA Step-Down Converter
General Description
The AAT2146W SwitchReg is a 2MHz fixed frequency
step-down converter with an input voltage range of 2.7V
to 5.5V and output voltage as low as 0.6V. It is optimized
to react quickly to a load variation. The AAT2146W is
ideal for applications where fixed frequency and low rip-
ple voltage are required over the full range of load condi-
tions.
The AAT2146W is programmable with external feedback
resistors. It can deliver 600mA of load current while
maintaining a low 150μA no-load quiescent current. The
2MHz switching frequency minimizes the size of external
components while keeping switching losses low.
The AAT2146W is designed to maintain high efficiency
throughout the operating range, which is critical for por-
table applications.
The AAT2146W is available in the Pb-free, space-saving
2.0x2.2mm SC70JW-8 package and is rated over the
-40°C to +85°C temperature range.
Features
• V_IN Range: 2.7V to 5.5V
• Low Ripple Voltage Fixed Frequency PWM Mode
• V_OUT Adjustable from 0.6V to V_IN
• Efficiency up to 96%
• 600mA Max Output Current
• 2MHz Switching Frequency
• 150μs Soft Start
• Fast Load Transient
• Over-Temperature Protection
• Current Limit Protection
• 100% Duty Cycle Low-Dropout Operation
• <1μA Shutdown Current
• SC70JW-8 Package
• Temperature Range: -40°C to +85°C
Applications
• Cellular Phones
• Digital Cameras
• Handheld Instruments
• Microprocessor / DSP Core / IO Power
• PDAs and Handheld Computers
• USB Devices
Typical Application
V_IN
C2
2.2µF
U1
AAT2146W
VIN
LX
EN
OUT
AGND PGND
PGND PGND
L1
4.7µH
V_O
C1
4.7µF
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
202008A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • May 28, 2012
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