Diodes AT5503 - Manual (Page 7)

Preliminary Datasheet
18V, 3A Synchronous DC-DC Buck Converter AT5503
Mar. 2013 Rev. 1. 0 BCD Semiconductor Manufacturing Limited
7
Typical Performance Characteristics
V
IN
=12V, V
OUT
=3.3V, L=4.7µH, T
A
=25°C, unless otherwise noted.
Figure 4. Efficiency vs. Output Current Figure 5. Quiescent Current vs. Temperature
Figure 6. Output Ripple (I
OUT
=2.5A) Figure 7. Load Transient Response (I
OUT
=0.2A to 2.5A)
V
SW
(10V/div)
V
OUT-AC
(20mV/div)
I
L
(1A/div)
V
OUT-AC
(200mV/div)
I
OUT
(1A/div)
Time(100µs/div)
-50 -25 0 25 50 75 100 125 150
0.80
0.85
0.90
0.95
1.00
1.05
1.10
1.15
1.20
1.25
1.30
Q
u
ie
sc
ent
C
u
rr
ent
(m
A)
Temperature ( o C)
Time(1µs/div)
0.01 0.1 1
10
20
30
40
50
60
70
80
90
100
E
ffic
ie
nc
y (
%
)
Output Current (A)
V
IN
=12V
V
OUT
=3.3V, L=4.7 μ H
V
OUT
=5.0V, L=6.8 μ H