Data Sheet
340kHz, 3A Synchronous DC-DC Buck Converter AP3503F
Oct. 2012 Rev. 1. 3 BCD Semiconductor Manufacturing Limited
7
Typical Performance Characteristics (Continued)
T
A
=25ºC, V
IN
=12V, V
OUT
=3.3V, unless otherwise noted.
Figure 8. High-side Switch On-resistance Figure 9. Low-side Switch On-resistance
vs. Case Temperature vs. Case Temperature
Figure 10. Output Ripple (I
OUT
=3A) Figure 11. Load Transient (I
OUT
=1.5A to 3A)
V
IN_AC
200mV/div
V
OUT_AC
20mV/div
I
L
2A/div
V
SW
10V/div
Time 4μs/div
V
OUT_AC
200mV/div
I
OUT
1A/div
Time 200μs/div
-60 -40 -20 0 20 40 60 80 100 120 140
40
60
80
100
120
140
160
Low-side Switch On-resistance (mΩ)
Case Temperature (
o
C)
-60 -40 -20 0 20 40 60 80 100 120 140
40
60
80
100
120
140
160
180
200
High-side Switch On-resistance (mΩ)
Case Temperature (
o
C)
