Diodes AP3202 - Manual (Page 6)

Preliminary Datasheet
380kHz, 2A Asynchronous DC-DC Buck Converter AP3202
Mar. 2011 Rev. 1. 2 BCD Semiconductor Manufacturing Limited
6
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
0
10
20
30
40
50
60
70
80
90
100
E
ff
iciency (%)
Output Current (A)
V
IN
=5V
V
IN
=12V
-40 -20 0 20 40 60 80 100 120 140
125
150
175
200
225
250
275
300
325
350
375
High-sid
e
Switc
h
O
n
-resist
an
c
e
(m
Ω
)
Case Temperature ( o C)
-60 -40 -20 0 20 40 60 80 100 120 140
1.00
1.05
1.10
1.15
1.20
1.25
1.30
Feedba
c
k
V
o
lt
a
ge (
V
)
Case Temperature ( o C)
Typical Performance Characteristics
T
A
=25 o C , V
IN
=12V, V
OUT
=3.3V, unless otherwise noted.
Figure 4. Efficiency vs. Output Current Figure 5. R
DSONH
vs. Case Temperature
Figure 6. R
DSONL
vs. Case Temperature Figure 7. Feedback Voltage vs. Case Temperature
-40 -20 0 20 40 60 80 100 120 140
4
6
8
10
12
14
16
18
20
Lo
w-s
ide Switc
h
O
n
-resist
a
n
c
e
(
Ω
)
Case Temperature ( o C)