PRODUCT DATASHEET
AAT1153
2A Step-Down Converter
Electrical Characteristics1
VIN = 3.6V, TA = -40°C to +85°C unless otherwise noted; typical values are TA = 25°C.
Symbol Description
Conditions
Min
Typ
Max
Units
VIN
VOUT
Input Voltage Range2
Output Voltage Range
2.5
0.6
5.5
VIN
500
1
V
V
μA
μA
nA
Active Mode: VFB = 0.5V
Shutdown Mode: VEN = 0V, VAIN = 5.5V
VFB = 0.65V
300
0.1
IQ
Input DC Supply Current
Feedback Input Bias Current
IFB
30
TA = 25°C
0°C ≤ TA ≤ 85°C
-40°C ≤ TA ≤ 85°C
0.5880 0.6000 0.6120
0.5865 0.6000 0.6135
0.5850 0.6000 0.6150
VFB
Regulated Feedback Voltage3
V
ΔVLINEREG
ΔVIN
/
Line Regulation
VIN = 2.5V to 5.5V, IOUT = 10mA
IOUT = 10mA to 2000mA
0.10
0.20
0.20
%/V
%/A
ΔVLOADREG
ΔIOUT
/
Load Regulation
VFB
Output Voltage Accuracy
VIN = 2.5 to 5.5V, IOUT = 10 to 2000mA
-3
+3
% VOUT
FOSC
TS
TSD
THYS
ILIM
Oscillator Frequency
Startup Time
Over-Temperature Shutdown Threshold
Over-Temperature Shutdown Hysteresis
Peak Switch Current
P-CH MOSFET
N-CH MOSFET
Enable Threshold Low
Enable Threshold High
Input Low Current
VFB = 0.6V
From Enable to Output Regulation
0.96
1.2
1.3
170
10
3.5
135
95
1.44
MHz
ms
°C
°C
A
2.5
VIN = 3.6V
VIN = 3.6V
200
150
0.3
RDS(ON)
mΩ
VEN(L)
VEN(H)
IEN
V
V
μA
1.5
-1.0
VIN = VEN = 5.5V
1.0
1. The AAT1153 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assured by design, characterization, and correla-
tion with statistical process controls.
2. VIN should be not less than VOUT + VDROPOUT, where VDROPOUT = IOUT x (RDS(ON)PMOS + ESRINDUCTOR), typically VDROPOUT = 0.3V.
3. The regulated feedback voltage is tested in an internal test mode that connects VFB to the output of the error amplifier.
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1153.2007.11.1.1
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
