Diodes AP3421/A/B - Manual (Page 10)

Preliminary Datasheet
1.3MHz, Dual 1.0A Synchronous Step-down Converters AP3421/A/B
Feb. 2013 Rev. 1. 4 BCD Semiconductor Manufacturing Limited
10
V
IN
5V/div
Output 2
Induction
Current
20mA/div
Output 1
Induction
Current
1A/div
V
IN
2V/div
Output 1
Induction
Current
1A/div
V
O1
2V/div
V
O2
2V/div
V
IN
2V/div
Output 2
Induction
Current
1A/div
V
O1
2V/div
V
O2
2V/div
V
IN
5V/div
Output 2
Induction
Current
1A/div
Output 1
Induction
Current
1A/div
Typical Performance Characteristics (Continued)
V
IN
=V
E/S
=5V, V
O1
=2.5V, V
O2
=1.2V, L1=L2=3.3
µH, C1=C3=10µF, C2=C2’=10µF, T
A
=25°C, unless
otherwise specified.
Time 40
µs/div
Time 40
µs/div
Figure 16. Short Protection for Output 1 Figure 17. Short Protection for Output 2
Time 10ms/div Time 10ms/div
Figure 18. Output 1 Short Recovery Figure 19. Output 2 Short Recovery