Datasheet

 
SBVS028B − DECEMBER 2000 − REVISED DECEMBER 2007
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4
ELECTRICAL CHARACTERISTICS (continued)
At T
A
= +25°C, V
S
= nominal, I
OUT
= 10mA, C
OUT
= 0.1µF ceramic, and C
IN
= 2.2µF ceramic, unless otherwise noted
(1)
.
DCR02 SERIES
PARAMETER UNITSMAXTYPMINTEST CONDITIONS
Synchronization Pin
Max external capacitance on SYNC pin 3 pF
Internal oscillator frequency 720 800 880 kHz
External synchronization frequency 720 880 kHz
External synchronization signal high 2.5 2.5 5.0 V
External synchronization signal low 0 0.4 V
Temperature Range
Operating −40 +70 °C
(1)
Ceramic capacitors, C
IN
= 2.2 µF, C
FILTER
= 1 µF, and C
OUT
= 0.1 µF.
(2)
During UL1950 recognition test only.
TYPICAL CHARACTERISTICS
Figure 1
0 40030025015050
30
0
10
100
20
40
90
V
I
(V)
21.5
22.5
23.0
24.0
25.0
26.0
70
50
60
80
100 200 350
26.0 V
25.0 V
24.0 V
26.0 V
25.0 V
23.0 V
η − Efficiency − %
I
O
− Output Current − mA
EFFICIENCY
vs
OUTPUT CURRENT
DCR022405
Figure 2
100
40
90
70
50
60
80
0 40030025015050 100 200 350
13.2 V
12.8 V
12.3 V
10.8 V
11.3 V
11.8 V
V
I
(V)
10.8
11.3
11.8
12.3
12.8
13.2
I
O
− Output Current − mA
η − Efficiency − %
DCR021205
EFFICIENCY
vs
OUTPUT CURRENT