aoz1280 Alpha & Omega Semiconductor, aoz1280 Datasheet - Page 5

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

Typical Performance Characteristics
Circuit of Figure 1. V
Rev. 1.0 May 2011
Start-up Through Enable No Load
Short Circuit Protection
Load Transient Test
(I
IN
OUT
= 12 V, V
200μs/div
2ms/div
1ms/div
= 2A to 0.8A)
OUT
= 3.3 V, L = 4.7 μH, C1 = 10 μF, C2 = 22 μF, T
Ven
5V/div
Vo
2V/div
Vlx
10V/div
IL
1A/div
Vo ripple
50mV/div
IL
1A/div
Io
1A/div
Vlx
10V/div
Vo
1V/div
lL
1A/div
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Start-up Through Enable with I
Short Circuit Recovery
A
Steady State Test
= 25 °C, unless otherwise specified.
Resistive Load
(I
500ns/div
OUT
2ms/div
1ms/div
= 0.5A)
OUT
= 1A
AOZ1280
Vo
1V/div
lL
1A/div
Vlx
10V/div
Ven
5V/div
Vo
2/div
Page 5 of 13
Vo ripple
20V/div
Vlx
10V/div
IL
500mA/div
Vlx
10V/div
IL
1A/div