AOZ1280
Typical Performance Characteristics (Continued)
Circuit of Figure 1. VIN = 12 V, VOUT = 3.3 V, L = 4.7 H, C1 = 10 F, C2 = 22 F, TA = 25 °C, unless otherwise specified.
Shut-down Through Enable with I
Resistive Load
= 1A
OUT
Shut-down Through Enable No Load
Ven
Ven
5V/div
5V/div
Vo
Vo
2/div
2/div
Vlx
10V/div
Vlx
10V/div
IL
1A/div
IL
1A/div
1ms/div
1ms/div
Efficiency
Efficiency (V = 12V) vs. Load Current
IN
Efficiency (V = 24V) vs. Load Current
IN
100
90
80
70
60
50
40
100
90
80
70
60
50
40
5.0V OUTPUT
5.0V OUTPUT
3.3V OUTPUT
3.3V OUTPUT
0
0.2
0.4
0.6
0.8
1.0
1.2
0
0.2
0.4
0.6
0.8
1.0
1.2
Load Current (A)
Load Current (A)
Efficiency (V = 5V) vs. Load Current
IN
100
5.0V OUTPUT
3.3V OUTPUT
90
80
70
60
50
40
0
0.2
0.4
0.6
0.8
1.0
1.2
Load Current (A)
Rev. 1.1 August 2011
www.aosmd.com
Page 6 of 13
AOS [ ALPHA & OMEGA SEMICONDUCTORS ]
