DATA SHEET
AAT2153
2.5A Low-Noise,Step-Down Converter
General Description
Features
The AAT2153 SwitchReg is a 2.5A step-down converter
with an input voltage range of 2.7V to 5.5V and an
adjustable output voltage from 0.6V to VIN. The 1.4MHz
switching frequency enables the use of small external
components. The small footprint and high efficiency make
the AAT2153 an ideal choice for portable applications.
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The AAT2153 delivers 2.5A maximum output current
while consuming only 42μA of no-load quiescent current.
Ultra-low RDS(ON) integrated MOSFETs and 100% duty
cycle operation make the AAT2153 an ideal choice for
high output voltage, high current applications which
require a low dropout threshold.
The AAT2153 provides excellent transient response and
high output accuracy across the operating range. No
external compensation components are required.
2.5A Maximum Output Current
Input Voltage: 2.7V to 5.5V
Output Voltage: 0.6V to VIN
Up to 95% Efficiency
Low Noise Light Load Mode
42μA No Load Quiescent Current
No External Compensation Required
1.4MHz Switching Frequency
100% Duty Cycle Low-Dropout Operation
Internal Soft Start
Over-Temperature and Current Limit Protection
2.5V) at low input voltages.
10
PGND
The integrated low-loss MOSFET switches can provide
greater than 95% efficiency at full load. Light load operation maintains high efficiency, low ripple and low spectral
noise even at lower currents (typically
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