AP3203 Datasheet, PDF (6/11 Pages) BCD Semiconductor Manufacturing Limited – 380kHz, 3A Asynchronous DC - DC Buck Converter

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