User Manual

150kHz 3A BUCK DC-DC CONVERTER AP3003
Data Sheet
9
Aug. 2008 Rev. 1. 2 BCD Semiconductor Manufacturing Limited
Typical Performance Characteristics (Continued)
Figure 10. Load Regulation
Figure 8. Efficiency vs. Input Voltage
Figure 9. Line Regulation
0 4 8 12162024283236
60.0
62.5
65.0
67.5
70.0
72.5
75.0
77.5
80.0
82.5
85.0
87.5
90.0
92.5
I
OUT
=3A, T
J
=25
O
C
3.3V V e r sion
5.0V V e r sion
12V Version
ADJ Version (V
OUT
=2.5V)
Efficiency (%)
Input Voltage (V)
Figure 11. Switch Saturation Voltage vs. Switch Current
0 4 8 12 16 20 24 28 32 36
-0.20
-0.16
-0.12
-0.08
-0.04
0.00
0.04
0.08
0.12
0.16
0.20
Output Voltage Change (%)
Input Voltage (V)
V
OUT
=5.0V
I
LOAD
=0.1A
T
J
=25
O
C
0.00.51.01.52.02.53.03.5
4.95
4.96
4.97
4.98
4.99
5.00
5.01
5.02
5.03
5.04
5.05
Output Voltage (V)
Output Current (A)
V
IN
=12V, V
OUT
=5.0V
T
J
=25
O
C
0.00.51.01.52.02.53.03.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
1.4
1.5
1.6
Switch Saturation Voltage (V)
Switch Current (A)
V
IN
=12V, T
J
=25
O
C