TPS60230
www.ti.com
SLVS516A – MAY 2004 – REVISED JUNE 2004
EFFICIENCY
vs
INPUT VOLTAGE
90
I
LED
= 25 mA
80
I
LED
= 15 mA
70
Efficiency − %
60
50
40
30
20
10
0
2.7
I
LED
= 10 mA
IQ− Quiescent Current − mA
3
2.8
2.6
2.4
2.2
2
1.8
1.6
1.4
1.2
1
0.8
0.6
0.4
0.2
0
3.1
3.5
3.9 4.3 4.7 5.1 5.5
V
I
− Input Voltage − V
5.9
6.3 6.5
2.7
3.1
3.5
QUIESCENT CURRENT
vs
INPUT VOLTAGE
T
A
= 255C
T
A
= −405C
T
A
= 855C
3.9 4.3 4.7 5.1 5.5
V
I
− Input Voltage − V
5.9
6.3 6.5
Figure 3.
MAXIMUM OUTPUT CURRENT
vs
INPUT VOLTAGE
0.40
T
A
= 255C
I O(max) − Maximum Output Current − A
0.35
0.30
V
LED
= 3 V
0.25
0.20
0.15
0.10
0.05
0
2.7
V
LED
= 3.2 V
1030
V
LED
= 3.4 V
V
LED
= 3.6 V
V
LED
= 3.8 V
Switching Frequency − kHz
1040
V
I
= 3.6 V
Figure 4.
SWITCHING FREQUENCY
vs
FREE-AIR TEMPERATURE
1020
1010
1000
990
3.1
3.5
3.9 4.3 4.7 5.1 5.5
V
I
− Input Voltage − V
5.9
6.3 6.5
980
−40 −30 −20 −10 0 10 20 30 40 50 60 70 80
T
A
− Free-Air Temperature −
5C
Figure 5.
Figure 6.
7
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