AOZ1021 Datasheet, PDF (6/15 Pages) Alpha & Omega Semiconductors – EZBuck™ 3A Synchronous Buck Regulator

Efficiency
AOZ1021 Efficiency
100
Efficiency (V_IN = 12V) vs. Load Current
95
5.0V OUTPUT
90
3.3V OUTPUT
85
1.8V OUTPUT
80
1.2V OUTPUT
75
70
65
0
0.5
1.0
1.5
2.0
2.5
3.0
Load Current (A)
Thermal Derating Curves
Derating Curve at 5V/6V Input
5
4
1.2V OUTPUT
3
2
1.8V
OUTPUT
3.3V
OUTPUT
1
0
25
35
45
55
65
75
85
Ambient Temperature (T_A)
AOZ1021
100
95
90
85
80
75
70
65
0
AOZ1021 Efficiency
Efficiency (V_IN = 5V) vs. Load Current
3.3V OUTPUT
1.8V
0.5
1.0
1.5
2.0
2.5
3.0
Load Current (A)
Derating Curve at 12 Input
3.3
3.2
3.1
1.2V, 1.8V, 3.3V, 5.0V OUTPUT
3.0
2.9
2.8
25
35
45
55
65
75
85
Ambient Temperature (T_A)
Rev. 1.1 November 2007
www.aosmd.com
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