CMOS High efficiency PFM step-up DC/DC converter
ELM93xxxB
• Vout=3.3V (ELM9333xB) (Top=25°C, L=330μH, D=MA721, Cin=Cout=22μF)
Vout - Iout
Vout - Vin
3.5
3
3.5
3
1.1V
Iout=10mA
Vin=0.9V
2.5
2
2.5
2
1.3V
1.5V
3mA
1mA
1.8V
1.5
1.5
1
1
0.1
1
10
100
0
1
2
3
Iout (mA)
Vin (V)
EFFICIENCY - Vin
EFFICIENCY - Iout
100
90
80
70
60
100
90
80
70
60
50
40
1.8V
1.5V
Iout=1mA
Vin=0.9V
1.1V
100˩A
1.3V
0
1
2
3
0.1
1
10
100
Vin (V)
Iout (mA)
VOLTAGE RIPPLE - Vin
Iout(max.) - L
Vin=1.5V
100
80
60
40
20
70
60
50
40
30
20
10
Iout=1mA
1.1V
1.0V
0.9V
0
1
2
3
0
200
400
600
800
1000
Vin (V)
L (˩H)
8 - 8