ELM91xxxxA CMOS PFM Step-up DC/DC converter and controller
• ELM91333xA
(FET=ELM37400FA, L=33μH, Cin=Cout=100μF, D=MA735, Vss=0V, Top=25°C)
Vout-Vin
Vout-Iout
4
3.5
3
4
3.5
3
Iout=10mA
Vin=2.4V
Vin=1.8V
2.5
2
Vin=0.9V
Iout=300mA
Iout=100mA
2.5
2
Vin=1.1V
Vin=1.5V
1.5
1
0
0.5
1
1.5
Vin (V)
2
2.5
3
3.5
1.5
0.1
1
10
100
1000
EFFICIENCY-Iout
RIPPLE VOLTAGE-Iout
100
90
80
70
60
50
40
800
700
600
500
400
300
200
100
0
Vin=2.4V
Vin=1.8V
Vin=1.5V
Vin=1.8V
Vin=0.9V
Vin=1.1V
Vin=1.5V
Vin=0.9V
Vin=1.1V
Vin=2.4V
800
0.1
1
10
100
1000
0
200
400
600
1000
Iout (mA)
Iout (mA)
22 - 19