1.5A, 1.4MHz Step-Down Converter
Typical Characteristics
Efficiency vs. Output Current
(PFM Mode; V
OUT
= 1.2V)
100
90
0.50
AAT1112
Load Regulation
(PFM Mode; V
OUT
= 1.2V)
V
IN
= 2.7V
V
OUT
Error (%)
0.25
Efficiency (%)
80
70
60
50
40
30
0.1
1
10
100
1000
10000
V
IN
= 2.7V
V
IN
= 3.6V
V
IN
= 3.6V
V
IN
= 4.2V
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
(PWM Mode; V
OUT
= 1.2V)
100
90
80
0.50
Load Regulation
(PWM Mode; V
OUT
= 1.2V)
V
IN
= 2.7V
V
IN
= 4.2V
V
IN
= 3.6V
Efficiency (%)
70
60
50
40
30
20
10
0
1
10
100
V
OUT
Error (%)
0.25
V
IN
= 2.7V
V
IN
= 3.6V
0.00
-0.25
V
IN
= 4.2V
1000
10000
-0.50
0.1
1
10
100
1000
10000
Output Current (mA)
Output Current (mA)
Output Voltage vs. Temperature
(V
IN
= 3.6V; V
OUT
= 1.8V; I
OUT
= 1A)
Supply Current vs. Supply Voltage
(V
OUT
= 1.8V; No Load; PFM Mode)
70
65
60
55
50
45
40
35
30
2.7
3.1
3.5
3.9
4.3
4.7
Output Voltage Change (%)
1.0
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1.0
-40
-20
0
20
40
60
80
Supply Current (µA)
0.8
85°C
25°C
-40°C
5.1
5.5
°
Temperature (°C)
Supply Voltage (V)
1112.2007.01.1.1
7
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
