XR76108 Datasheet, PDF (10/17 Pages) Exar Corporation – 8A and 12A Synchronous Step Down COT Regulator

Efficiency – XR76108/ XR76112
TAMBIENT=25°C, No Air flow, Inductor losses are included.
100
95
90
85
80
75
70
65
60
0.1
3.3V_CCM
2.5V_CCM
1.8V_CCM
1.5V_CCM
1.2V_CCM
1.0V_CCM
1
3.3V_DCM
2.5V_DCM
1.8V_DCM
1.5V_DCM
1.2V_DCM
1.0V_DCM
10
I_OUT (A)
Figure 23: XR76108, 5VIN, 600kHz, 1uH
100
95
2.2uH
90
85
80
1uH
5.0V_CCM 5.0V_DCM
75
3.3V_CCM 3.3V_DCM
2.5V_CCM 2.5V_DCM
70
1.8V_CCM 1.8V_DCM
1.5V_CCM 1.5V_DCM
65
1.2V_CCM 1.2V_DCM
60
0.1
1.0V_CCM
1
I_OUT (A)
1.0V_DCM
10
Figure 25: XR76108, 12VIN, 600kHz
100
95
90
85
80
75
70
5.0V_CCM 5.0V_DCM
3.3V_CCM 3.3V_DCM
65
2.5V_CCM 2.5V_DCM
60
0.1
1
10
I_OUT (A)
Figure 27: XR76108, 22VIN, 400kHz, 3.3uH
XR76108 and XR76112
100
95
90
85
80
75
70
65
60
0.1
3.3V_ CCM
2.5V_ CCM
1.8V_ CCM
1.5V_ CCM
1.2V_ CCM
1.0V_ CCM
1
3.3V_DCM
2.5V_DCM
1.8V_DCM
1.5V_DCM
1.2V_DCM
1.0V_DCM
10
I_OUT (A)
Figure 24: XR76112, 5VIN, 600kHz, 0.56uH
100
1uH
95
90
85
80
0.56uH
75
70
65
60
0.1
5.0V_CCM
3.3V_CCM
2.5V_CCM
1.8V_CCM
1.5V_CCM
1.2V_CCM
1.0V_CCM
1
I_OUT (A)
5.0V_DCM
3.3V_DCM
2.5V_DCM
1.8V_DCM
1.5V_DCM
1.2V_DCM
1.0V_DCM
10
Figure 26: XR76112, 12VIN, 600kHz
100
95
90
85
80
75
70
5.0V_CCM
5.0V_DCM
3.3V_CCM
3.3V_DCM
65
2.5V_CCM
2.5V_DCM
60
0.1
1
10
I_OUT (A)
Figure 28: XR76112, 22VIN, 400kHz, 2.2uH
© 2013-2014 Exar Corporation
10/17
www.exar.com
Rev. 2A