PRODUCT DATASHEET
AAT1153
2A Step-Down Converter
Typical Characteristics
Efficiency vs. Output Current
(VOUT = 3.3V, TA = 25°C, L = 2.2µH, CIN = COUT = 22µF)
DC Regulation
(VOUT = 3.3V, TA = 25°C, L = 2.2µH, CIN = COUT = 22µF)
3.399
100
VIN = 4.2V
90
3.366
80
VIN = 5.5V
VIN = 5.0V
VIN = 3.7V
VIN = 5.5V
70
3.333
3.300
3.267
3.234
3.201
60
VIN = 5.0V
50
40
30
20
10
0
VIN = 3.7V
VIN = 4.2V
0.1
1
10
100
1000
10000
0
200 400 600 800 1000 1200 1400 1600 1800 2000
Output Current (mA)
Output Current (mA)
Efficiency vs. Output Current
(VOUT = 1.8V, TA = 25°C, L = 2.2µH, CIN = COUT = 22µF)
DC Regulation
(VOUT = 1.8V, TA = 25°C, L = 2.2µH, CIN = COUT = 22µF)
100
90
1.854
VIN = 4.2V
VIN = 3.6V
VIN = 2.5V
1.836
1.818
80
70
60
50
40
30
20
10
0
VIN = 4.2V
VIN = 5.0V
VIN = 5.5V
VIN = 5.5V
1.800
1.782
1.764
1.746
VIN = 5.0V
VIN = 3.6V
VIN = 2.5V
0
200 400 600 800 1000 1200 1400 1600 1800 2000
0.1
1
10
100
1000
10000
Output Current (mA)
Output Current (mA)
Efficiency vs. Output Current
(VOUT = 1.5V, TA = 25°C, L = 2.2µH, CIN = COUT = 22µF)
DC Regulation
(VOUT = 1.5V, TA = 25°C, L = 2.2µH, CIN = COUT = 22µF)
100
1.545
90
80
70
60
50
40
30
20
10
0
VIN = 4.2V
VIN = 3.6V
VIN = 2.5V
1.530
VIN = 4.2V
1.515
1.500
1.485
1.470
1.455
VIN = 5.0V
VIN = 5.5V
VIN = 5.5V
VIN = 5.0V
VIN = 3.6V
VIN = 2.5V
0.1
1
10
100
1000
10000
0
200 400 600 800 1000 1200 1400 1600 1800 2000
Output Current (mA)
Output Current (mA)
w w w . a n a l o g i c t e c h . c o m
1153.2007.11.1.1
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ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
