1.5A, 1.4MHz Step-Down Converter
Typical Characteristics
Efficiency vs. Output Current
(PWM Mode; V
OUT
= 2.5V)
100
90
80
0.50
AAT1112
Load Regulation
(PWM Mode; V
OUT
= 2.5V)
V
IN
= 3.6V
V
IN
= 2.7V
Efficiency (%)
70
60
50
40
30
20
10
0
1
V
IN
= 5.0V
V
IN
= 4.2V
V
IN
= 3.6V
10
100
1000
10000
V
OUT
Error (%)
0.25
V
IN
= 2.7V
V
IN
= 5.0V
0.00
-0.25
V
IN
= 4.2V
-0.50
0.1
1
10
100
1000
10000
Output Current (mA)
Output Current (mA)
Efficiency vs. Output Current
(PFM Mode; V
OUT
= 1.8V)
100
90
0.50
Load Regulation
(PFM Mode; V
OUT
= 1.8V)
V
IN
= 2.7V
V
OUT
Error (%)
0.25
Efficiency (%)
80
70
60
50
40
0.1
V
IN
= 3.6V
V
IN
= 2.7V
V
IN
= 3.6V
V
IN
= 4.2V
0.00
-0.25
V
IN
= 4.2V
1
10
100
1000
10000
-0.50
0.1
1
10
100
1000
Output Current (mA)
Output Current (mA)
Efficiency vs. Output Current
(PWM Mode; V
OUT
= 1.8V)
100
90
80
0.50
Load Regulation
(PWM Mode; V
OUT
= 1.8V)
Efficiency (%)
70
60
50
40
30
20
10
0
1
10
V
IN
= 4.2V
V
OUT
Error (%)
V
IN
= 2.7V
0.25
V
IN
= 2.7V
V
IN
= 3.6V
0.00
V
IN
= 3.6V
-0.25
V
IN
= 4.2V
100
1000
10000
-0.50
0.1
1
10
100
1000
10000
Output Current (mA)
Output Current (mA)
6
1112.2007.01.1.1