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SLVS413C – OCTOBER 2002 – REVISED AUGUST 2007
EFFICIENCY
vs
LOAD CURRENT
EFFICIENCY
vs
INPUT VOLTAGE
90
L = 10
µH
V
O
= 18 V
90
88
86
84
V
O
= 18 V
L = 10
µH
L = 3.3
µH
88
86
84
I
O
= 10 mA
I
O
= 5 mA
Efficiency - %
82
80
78
76
74
72
70
0.10
Efficiency - %
82
80
78
76
74
72
70
1
10
I
L
- Load Current - mA
Figure 3.
TPS61040
QUIESCENT CURRENT
vs
INPUT VOLTAGE
100
1
2
3
4
5
6
V
I
- Input Voltage - V
Figure 4.
FEEDBACK VOLTAGE
vs
FREE-AIR TEMPERATIRE
1.24
40
35
T
A
= 85°C
1.238
Quiescent Current -
µ
A
T
A
= 27°C
25
T
A
= -40°C
20
15
10
5
0
1.8
2.4
3
3.6
4.2
4.8
5.4
6
VFB - Feedback Voltage - V
30
1.236
V
CC
= 2.4 V
1.234
1.232
1.23
-40
-20
0
V
I
- Input Voltage - V
Figure 5.
20
40
60
80
T
A
- Temperature -
°C
100
120
Figure 6.
Copyright © 2002–2007, Texas Instruments Incorporated
7
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