aoz1280 Alpha & Omega Semiconductor, aoz1280 Datasheet - Page 6

• Manufacturer Part Number: aoz1280
• Description: Ezbucktm 1.2 A Synchronous Buck Regulator
• Manufacturer: Alpha & Omega Semiconductor

Typical Performance Characteristics
Circuit of Figure 1. V
Efficiency
Rev. 1.0 May 2011
100
90
80
70
60
50
40
Shut-down Through Enable No Load
0
Efficiency (V
0.2
IN
= 12 V, V
0.4
1ms/div
Load Current (A)
IN
= 12V) vs. Load Current
OUT
0.6
= 3.3 V, L = 4.7 μH, C1 = 10 μF, C2 = 22 μF, T
100
0.8
90
80
70
60
50
40
0
3.3V OUTPUT
5.0V OUTPUT
1.0
Efficiency (V
0.2
(Continued)
Ven
5V/div
Vo
2/div
IL
1A/div
Vlx
10V/div
1.2
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0.4
Load Current (A)
IN
= 5V) vs. Load Current
0.6
Shut-down Through Enable with I
100
90
80
70
60
50
40
0.8
0
3.3V OUTPUT
5.0V OUTPUT
Efficiency (V
1.0
A
0.2
= 25 °C, unless otherwise specified.
Resistive Load
1.2
1ms/div
0.4
Load Current (A)
IN
= 24V) vs. Load Current
0.6
0.8
OUT
3.3V OUTPUT
5.0V OUTPUT
= 1A
1.0
AOZ1280
Page 6 of 13
Ven
5V/div
Vo
2/div
Vlx
10V/div
IL
1A/div
1.2