ELM91xxxxA CMOS PFM Step-up DC/DC converter and controller
• ELM91331xA(L=100μH, Cin=Cout=47μF, D=MA2Z748, Top=25°C)
Vout-Vin
Vout-Iout
4
3.5
3
4
3.5
3
Iout=1mA
2.4V
1.8V
1.1V
2.5
2
Vin=0.9V
Iout=10mA
Iout=40mA
2.5
2
1.5
1
1.5V
0.5
1.5
0
0.5
1
1.5
2
2.5
3
0.1
1
10
100
1000
Vin (V)
Iout (mA)
EFFICIENCY-Iout
RIPPLE VOLTAGE-Iout
100
90
80
70
60
50
40
200
180
160
140
120
100
80
2.4V
1.8V
2.4V
Vin=0.9V
1.5V
1.8V
1.5V
60
40
1.1V
20
1.1V
100
Vin=0.9V
0
0.1
1
10
1000
0
20 40 60 80 100 120 140 160 180 200
Iout (mA)
Iout (mA)
22 - 11