User guide

Data Sheet
1.2A, 1.4MHz High Efficiency Synchronous DC-DC Buck Converter AP3417B
Jan. 2013 Rev. 1. 0 BCD Semiconductor Manufacturing Limited
8
Typical Performance Characteristics (Continued)
Figure 12. R
DS(ON)_DOWN
vs. Temperature Figure 13. Output Ripple (I
OUT
=0A)
Figure 14. Output Ripple (I
OUT
=1.2A) Figure 15. Load Transient (I
OUT
=0A to 1.2A)
Time 4ms/div
V
OUT_AC
5mV/div
V
SW
5V/div
I
L
100mA
/
div
Time 200µs/div
V
OUT_AC
200mV/div
I
OUT
1A
/
div
V
SW
5V/div
V
OUT_AC
10mV/div
V
SW
5V/div
I
L
1A/div
Time 400ns/div
-40 -20 0 20 40 60 80 100 120 140
0.04
0.08
0.12
0.16
0.20
0.24
0.28
0.32
Temperature (
o
C)
NMOS R
DS(ON)_DOWN
(Ω)
V
IN
=5.0V
I
SW
=200mA