AOZ1280
Typical Performance Characteristics
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.
Load Transient Test
Steady State Test
(I
= 0.2A to 0.8A)
(I
= 0.5A)
OUT
OUT
Vo ripple
20V/div
Vo ripple
50mV/div
Vlx
10V/div
IL
1A/div
IL
500mA/div
Io
1A/div
200μs/div
500ns/div
Short Circuit Protection
Short Circuit Recovery
Vlx
10V/div
Vlx
10V/div
Vo
1V/div
Vo
1V/div
lL
1A/div
lL
1A/div
2ms/div
2ms/div
Start-up Through Enable with I
Resistive Load
= 1A
OUT
Start-up Through Enable No Load
Ven
Ven
5V/div
5V/div
Vo
2/div
Vo
2V/div
Vlx
10V/div
Vlx
10V/div
IL
1A/div
IL
1A/div
1ms/div
1ms/div
Rev. 1.1 August 2011
www.aosmd.com
Page 5 of 13
AOS [ ALPHA & OMEGA SEMICONDUCTORS ]
