600mA, 1.2MHz, Micropower
Synchronous Step-Up Converter
Typical Characteristics
Efficiency vs. Output Current
(V
OUT
= 3.3V; T
A
= 25°C)
°
100
90
80
100
AAT1217
Efficiency vs. Output Current
(V
OUT
= 5V; T
A
= 25°C)
°
90
80
V
IN
= 2.4V
V
IN
= 2.4V
V
IN
= 3.6V
V
IN
= 1.2V
V
IN
= 1.5V
Efficiency (%)
Efficiency (%)
70
60
50
40
30
20
10
0
0.1
1
10
100
1000
70
60
50
40
30
20
10
0
0.1
1
10
100
1000
V
IN
= 1.5V
V
IN
= 1.2V
Output Current (mA)
Output Current (mA)
Output Voltage vs. Output Current
(V
OUT
= 3.3V; T
A
= 25°C)
°
3.5
5.2
Output Voltage vs. Output Current
(V
OUT
= 5V; T
A
= 25°C)
°
Output Voltage (V)
3.4
Output Voltage (V)
5.1
V
IN
= 1.2V
3.3
V
IN
= 1.5V
V
IN
= 2.4V
V
IN
= 1.2V
5
V
IN
= 1.5V
V
IN
= 2.4V
V
IN
= 3.6V
4.9
3.2
3.1
0
100
200
300
400
500
600
4.8
0
100
200
300
400
500
600
Output Current (mA)
Output Current (mA)
Minimum Start-Up Voltage vs. Output Current
(V
OUT
= 3.3V; T
A
= 25°C)
°
1.5
Maximum Output Current vs. Input Voltage
(L = 4.7µH; T
A
= 25°C)
°
1000
Start-Up Voltage (V)
Maximum Output
Current (mA)
1.35
1.2
1.05
0.9
0.75
0.6
0
20
40
60
80
100
120
140
160
180
200
800
V
OUT
= 3.3V
600
400
V
OUT
= 5V
200
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
Output Current (mA)
Input Voltage (V)
1217.2007.07.1.0
5
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
