Diodes AP3427M - Manual (Page 6)

Preliminary Datasheet
Dual 1A, 1.5MH
Z
Synchronous Step-down DC-DC Converter AP3427M
Mar. 2013 Rev. 1.0 BCD Semiconductor Manufacturing Limited
6
0 100 200 300 400 500 600 700 800 900 1000 1100 1200
0
10
20
30
40
50
60
70
80
90
100
Output Current (mA)
Ef
fic
ienc
y (%)
V
IN
= 3.3V
V
OUT
= 1.0V
V
OUT
= 1.2V
V
OUT
= 1.8V
Typical Performance Characteristics
0 100 200 300 400 500 600 700 800 900 1000 1100 1200
0
10
20
30
40
50
60
70
80
90
100
Output Current (mA)
E
ffi
ci
e
n
c
y
(
%
)
V
IN
= 5.0V
V
OUT
= 1.0V
V
OUT
= 1.2V
V
OUT
= 1.8V
V
OUT
= 2.5V
V
OUT
= 3.3V
Figure 4. Efficiency vs. Output Current (V
IN
=5V) Figure 5. Efficiency vs. Output Current (V
IN
=3.3V)
Figure 6. Regulated Feedback Voltage vs. Temperature
Figure 7. Oscillator Frequency vs. Temperature
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 130
1.30
1.32
1.34
1.36
1.38
1.40
1.42
1.44
1.46
1.48
1.50
1.52
1.54
Temperature ( o C)
Oscill
a
tor F
re
quency (MHz)
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 130
0.590
0.592
0.594
0.596
0.598
0.600
0.602
0.604
0.606
0.608
0.610
Temperature ( o C)
R
e
gu
lat
e
d F
e
e
d
b
a
c
k
V
o
lt
ag
e (
V
)