PRODUCT DATASHEET
AAT2113A
SwitchReg
TM
3MHz, Fast Transient 1.5A Step-Down Converter in 2mm x 2mm Package
Features
•
•
•
•
•
•
•
5mm x 5mm Total Solution Size
1.5A Maximum Output Current
Tiny 0.47μH Chip Inductor
Excellent Transient Response
Input Voltage: 2.7V to 5.5V
Ultra-small, Low Profile 8-pin 2mm x 2mm FTDFN
Package
Fixed or Adjustable Output Voltage Options:
▪
Fixed Output Voltage: 1.2V
▪
Adjustable Output Voltage: 1.0V to 1.8V
High Efficiency, Low Noise Architecture
3MHz Switching Frequency
No External Compensation Required
55μA No Load Quiescent Current
100% Duty Cycle Low-Dropout Operation
Internal Soft Start
Over-Temperature and Current Limit Protection
<1μA Shutdown Current
-40°C to 85°C Temperature Range
General Description
The AAT2113A SwitchReg™ is a 1.5A step-down con-
verter with a typical input voltage of 3.3V and a fixed
output voltage of 1.2V or an adjustable output. The
3MHz switching frequency enables the use of small
external components. The ultra-small 2mm x 2mm foot-
print and high efficiency make the AAT2113A an ideal
choice for portable applications.
The AAT2113A delivers 1.5A maximum output current
while consuming only 55μA no-load quiescent current.
Low R
DS(ON)
integrated MOSFETs and 100% duty cycle
operation make the AAT2113A the ideal choice for high
output voltage, high current applications which require a
low dropout threshold.
The AAT2113A provides excellent transient response and
output accuracy across the operating range. No external
compensation is required.
The AAT2113A maintains high efficiency throughout the
load range. The unique low-noise architecture reduces
ripple and spectral noise. The AAT2113A automatically
optimizes efficiency during Light Load mode (LL) and
maintains constant frequency and low output ripple dur-
ing PWM mode.
Over-temperature and short circuit protection safeguard
the AAT2113A and system components from damage.
The AAT2113A is available in a Pb-free, ultra-small, low
profile, 8-pin 2mm x 2mm FTDFN package. The product
is rated over a temperature range of -40°C to 85°C.
•
•
•
•
•
•
•
•
•
Applications
•
•
•
•
•
•
•
•
Cellular Phones
Digital Cameras
Hard Disk Drives
MP3 Players
PDAs and Handheld Computers
Portable Media Players
USB Devices
Wireless Network Cards
Typical Application
Load Transient Response
(V
IN
= 5V; V
OUT
= 1.2V; I
OUT
= 10% to 100%;
C
OUT
= 10µF, 6.3V, 0603)
1.3V
1.25V
1.2V
1.15V
1.1V
1.5A
100mV
VIN
2.7V to 5.5V
U1
VP
EN
LX
LX
FB
L1
0.47µH
VOUT
1.2V/1.5A
C1
4.7µF
6.3V
0603
C3
1.0µF
6.3V
0402
VCC
AAT2113A
C3
10µF
6.3V
0603
AGND
PGND
150mA
FTDFN 22-8
Time (20µs/div)
2113A.2009.06.1.1
www.analogictech.com
1
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
