Datasheet

TPS62040
TPS62042, TPS62043
TPS62044, TPS62046
SLVS463B − JUNE 2003 − REVISED OCTOBER 2005
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6
TYPICAL CHARACTERISTICS
TABLE OF GRAPHS
FIGURE
η Efficiency vs Load current 1, 2, 3
η Efficiency vs Input voltage 4
I
Q
Quiescent current vs Input voltage 5, 6
f
s
Switching frequency vs Input voltage 7
r
DS(on)
P-Channel r
DS(on)
vs Input voltage 8
r
DS(on)
N-Channel rectifier r
DS(on
) vs Input voltage 9
Load transient response 10
PWM operation 11
Power save mode 12
Start-up 13
Figure 1
40
45
50
55
60
65
70
75
80
85
90
95
100
0 0.01 0.1 1
10 100 1 k 10 k
V
O
= 3.3 V
V
I
= 3.6 V
MODE = Low
V
I
= 5 V
MODE = Low
V
I
= 3.6 V
MODE = High
V
I
= 5 V
MODE = High
Efficiency − %
EFFICIENCY
vs
LOAD CURRENT
I
L
− Load Current − mA
Figure 2
40
45
50
55
60
65
70
75
80
85
90
95
100
0 0.01 0.1 1 10 100 1 k 10 k
V
O
= 1.8 V
V
I
= 2.7 V
V
I
= 3.6 V
V
I
= 5 V
MODE = Low
V
I
= 3.6 V
MODE = High
Efficiency − %
EFFICIENCY
vs
LOAD CURRENT
I
L
− Load Current − mA