DATA SHEET
AAT2113B
3.3MHz, Fast Transient 1.5A Step-Down Converter in an 2mm x 2mm Package
General Description
Features
The AAT2113B SwitchReg™ is a 1.5A step-down converter with a typical input voltage of 3.3V and a fixed
output voltage of 1.2V or an adjustable output. The
3.3MHz switching frequency enables the use of small
external components. The ultra-small 2mm x 2mm footprint and high efficiency make the AAT2113B an ideal
choice for portable applications.
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The AAT2113B delivers 1.5A maximum output current
while consuming only 55μA no-load quiescent current.
Low RDS(ON) integrated MOSFETs and 100% duty cycle
operation make the AAT2113B the ideal choice for high
output voltage, high current applications which require a
low dropout threshold.
The AAT2113B provides excellent transient response and
output accuracy across the operating range. No external
compensation is required.
The AAT2113B maintains high efficiency throughout the
load range. The unique low-noise architecture reduces
ripple and spectral noise. The AAT2113B automatically
optimizes efficiency during Light Load mode (LL) and
maintains constant frequency and low output ripple during PWM mode.
Over-temperature and short circuit protection safeguard
the AAT2113B and system components from damage.
The AAT2113B 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.
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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 2.5V
High Efficiency, Low Noise Architecture
3.3MHz 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
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