ap3409 BCD Semiconductor Manufacturing Limited, ap3409 Datasheet - Page 8

• Manufacturer Part Number: ap3409
• Description: 3a, 4mhz High Efficiency Synchronous Buck Converter
• Manufacturer: BCD Semiconductor Manufacturing Limited

Typical Performance Characteristics (Continued)
V
Jul. 2010 Rev. 1. 0
0.9
0.8
0.7
0.6
0.5
3A, 4MHz High Efficiency Synchronous Buck Converter
IN
-60
140
120
100
Figure 10. V
80
60
=V
-60
Figure 8. NMOS ON Reisistance vs.
DD
-30
=V
-30
Ambient Temperature
PVDD
FB
0
Ambient Temperature (
0
vs. Ambient Temperature
Ambient Temperature (
=3.3V, T
30
30
60
A
=25℃, unless otherwise specified.
60
O
C )
90
O
C )
90
V
V
IN
OUT
=3.3V
V
V
=2.5V
120
IN
FB
=3.3V
=0.85V
120
150
150
8
Figure 11. Current Limit vs. Ambient Temperature
Figure 9. Frequency vs. Ambient Temperature
5
4
3
2
1.2
1.1
1.0
0.9
0.8
0.7
-60
-60
BCD Semiconductor Manufacturing Limited
-30
-30
Preliminary Datasheet
0
Ambient Temperature (
0
Ambient Temperature (
30
30
60
60
O
C )
O
90
C )
90
AP3409
V
V
V
V
IN
OUT
IN
FB
=3.3V
120
=3.3V
=0.75V
=2.5V
120
150
150