AAT1130 Datasheet, PDF (1/18 Pages) Advanced Analogic Technologies – 2.5MHz 500mA Step-Down DC/DC Converter

DATA SHEET
AAT1130
2.5MHz 400mA Step-Down DC/DC Converter
General Description
The AAT1130 SwitchReg™ is a member of Skyworks' Total
Power Management IC™ product family. The converter
uses a predictive on-time, current-mode step-down con-
trol scheme that provides a fixed 2.5MHz switching fre-
quency (under steady state conditions). It allows the
control circuit to react nearly instantly in order to improve
transient response and to enhance stability with the LC
components as small as 1.0μH. The unique architecture
improves transient response while allowing tiny passive
LC filter components. The high switching frequency (up to
2.5MHz) keeps output voltage ripple low.
The AAT1130 delivers up to 400mA of output current,
while consuming only 60μA of quiescent current. The
AAT1130 regulates an output voltage between 0.6V and
1.8V from an input voltage of 2.7V to 5.5V. The AAT1130's
output voltage is set by an external resistive voltage
divider circuit. Internal MOSFET switches reduce the over-
all solution size while maintaining high efficiency over a
wide load current range.
The AAT1130 is available in a space-saving 2.0x2.2mm
SC70JW-10 package and is rated over the -40°C to 85°C
temperature range.
Features
• 2.5MHz Switching Frequency
• Fast Transient Response with Small LC Output Filter
Components
• Input Voltage Range: 2.7V to 5.5V
• Output Voltage Range: 0.6V to 1.8V
• High 92% Peak Efficiency (V_IN = 3.6V, V_OUT = 1.8V)
• Low 60μA Quiescent Current
• 400mA Maximum Continuous Output Current
• Internal 150μs Soft-Start Feedback Ramp
• Over-Temperature Protection
• Anti-Ringing Switch to Reduce EMI During Discontinuous
Conduction Mode Operation
• Valley Current Limit Protection
• SC70JW-10 Package
• -40°C to 85°C Temperature Range
Applications
• Microprocessor/DSP Core and I/O
• Mobile Phones
• PDAs and Handheld Computers
• Digital Cameras
• Portable Music Players
• Handheld Games
• Handheld Instruments
Typical Application
VIN
2.4V to 5.5V
1.0V V_OUT
1.10
L 1.0μH
400mA
1.05
4 _VP
LX ⁵
1.00
CIN
4.7μF
0603
6V
3 _{VCC OUT} 2
C3
AAT1130 _100pF
R1
150kΩ
0603 1%
COUT
4.7μF
0603
6V
0.95
0.90
0.85
X5R
FB ¹
X5R
0.80
R2
0.75
ON
OFF
6 _{EN GND} 7-10
100kΩ
0603 1%
0.70
1.6
1.4
1.2
1.0
0.8
0.6
400mA
0.4
100mA
0.2
0
Time (5µs/div)
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
201977B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • March 15, 2013
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