Analog Devices UG-197 User Manual page 5

Evaluation Board User Guide
80
70
60
50
40
30
20
10
0
0 50 100 150 200
LOAD CURRENT (mA)
Figure 5. 5 V In to 5 V Out Efficiency with the Coilcraft Transformer at Various
Switching Frequencies
80
70
60
50
40
30
20
10
0
0 50 100 150 200
LOAD CURRENT (mA)
Figure 6. 5 V In to 5 V Out Efficiency with the Coilcraft Transformer at 500 kHz
over Temperature
1MHz
700kHz
500kHz
200kHz
250 300 350 400 450 500
–40°C
+25°C
+105°C
250 300 350 400 450 500
80
70
60
50
40
30
20
10
0
0 50
Figure 7. 5 V In to 5 V Out Efficiency with the Halo Transformer at Various
80
70
60
50
40
30
20
10
0
0 50
Figure 8. Single Supply Efficiency for Various Output Configurations with the
Rev. 0 | Page 5 of 16
1MHz
700kHz
500kHz
200kHz
100 150 200 250 300 350
LOAD CURRENT (mA)
Switching Frequencies
5V IN TO 5V OUT
5V IN TO 3.3V OUT
3.3V IN TO 3.3V OUT
100 150 200 250 300 350
LOAD CURRENT (mA)
Coilcraft Transformer at 500 kHz
UG-197
400 450 500
400 450 500