Instruction Manual

Preliminary Datasheet
380kHz, 3A Asynchronous DC - DC Buck Converter AP3203
Mar. 2011 Rev. 1. 0 BCD Semiconductor Manufacturing Limited
6
Note 2:
2SW1SW
2SW1SW
DSON
II
VV
R
−
−
=
Note 3: Not tested, guaranteed by design.
Typical Performance Characteristics
T
A
=25ºC, V
IN
=12V, V
OUT
=3.3V, unless otherwise noted.
Figure 4. Efficiency vs. Output Current Figure 5. Quiescent Current vs. Temperature
Figure 6. Output Voltage vs. Output Current Figure 7. Feedback Voltage vs. Temperature
-60 -40 -20 0 20 40 60 80 100 120 140
0.70
0.75
0.80
0.85
0.90
0.95
1.00
1.05
1.10
1.15
1.20
1.25
1.30
1.35
1.40
Quiescent Current (mA)
Temperature (
o
C)
0.0 0.5 1.0 1.5 2.0 2.5 3.0
3.00
3.05
3.10
3.15
3.20
3.25
3.30
3.35
3.40
3.45
3.50
Output Voltage (V)
Output Current (A)
-60 -40 -20 0 20 40 60 80 100 120 140
1.10
1.12
1.14
1.16
1.18
1.20
1.22
1.24
1.26
1.28
1.30
Feedback Volage (V)
Temperature (
o
C)
0.00.51.01.52.02.53.0
0
10
20
30
40
50
60
70
80
90
100
Efficiency (%)
Output Current (A)
V
IN
=12V
V
IN
=5V