ELM611DA 2A 23V
high efficiency synchronous PWM step down DC/DC converter
■Typical characteristics
• Vout=1.8V : Cin=10µF, Cout=22µF, L=10µH, R1=13.8kΩ, R2=14.7kΩ, Top=25°C
Vout-Vin
100mA
EFFICIENCY-Iout
2.4
2.0
1.6
1.2
0.8
0.4
100
80
60
40
20
0
1A
Iout=1mA
Vin=12V
Vin=5V
10mA
0.1
1
10
100
1000
23
0
4
8
12
16
20
Vin (V)
Iout (mA)
Vfb-Top
Vout-Iout
Vin=12V, Iout=0.1A
1.9
1.8
1.7
0.95
0.94
0.93
0.92
0.91
0.90
Vin=12V
Vin=5V
-40 -20
0
20
40
60
80
1
10
100
1000
Top (�)
Iout (mA)
Start Response
Load Transient Response
Vin=12V, Iout=1mA�1A
Vin=12V, No load
2
1
0
2.5
2
1.5
1
2
1
0
0.5
0
0
5
10 15 20 25 30 35 40
Time (ms)
0
0.1
0.2
0.3
0.4
Time (ms)
Rev.1.2
11 - 9