TPS54810
SLVS420A 鈭?MARCH 2002 鈭?R EVISED AUGUST 2002
www.ti.com
PERFORMANCE GRAPHS (FROM APPLICATION CIRCUIT SHOWN IN FIGURE 9)
EFFICIENCY
vs
OUTPUT CURRENT
100
95
90
85
Efficiency 鈭?%
80
75
70
65
60
55
50
0
2
4
6
8
10
IO 鈭?Output Current 鈭?A
0.998
0.997
0
2
4
6
8
10
IO 鈭?Output Current 鈭?A
VI = 5 V
VO = 1.8 V
fs = 700 kHz
Load Regulation
1.003
VI = 5 V
VO = 1.8 V
TA = 25擄C
fs = 700 kHz
LOAD REGULATION
vs
OUTPUT CURRENT
1.001
1.0008
1.0006
Line Regulation
1.0004
1.0002
1
0.9998
0.9996
0.9994
0.9992
0.999
4.5
4.7
4A
LINE REGULATION
vs
INPUT VOLTAGE
VI = 5 V
VO = 1.8 V
TA = 25擄C
fs = 700 kHz
1.002
8A
1.001
1
0.999
0A
4.9 5.1 5.3 5.5 5.7
VI 鈭?Input Voltage 鈭?V
5.9
Figure 11
AMBIENT TEMPERATURE
vs
OUTPUT CURRENT (1)
125
Output Ripple Voltage 鈭?10 mV/div
115
T A 鈭?Ambient Temperature 鈭?/div>
擄
C
105
95
85
75
65
55
45
35
25
0
1
2
3
4
5
6
IO 鈭?Output Current 鈭?A
7
8
VI = 5 V
TJ = 25擄C
fs = 700 kHz
Figure 12
Figure 13
OUTPUT RIPPLE VOLTAGE
VI = 5 V
VO = 1.8 V
IO = 6 A
fs = 700 kHz
VO 鈭?Output Voltage 鈭?100 mV/div
TRANSIENT RESPONSE
VI = 5 V
2 A to 6.5 A
t 鈭?Time 鈭?1
碌s/div
t 鈭?Time 鈭?20
碌s/div
Figure 14
Figure 15
Figure 16
SLOW-START TIMING
Input Voltage 鈭?2 V/div
VI = 5 V,
0.04
碌F
Slow-start Cap
4.0 ms/div
Figure 17
(1) Safe operating area is applicable to the test board conditions in the Dissipation Ratings
10
Output Voltage 鈭?2 V/div
I O 鈭?Output Current 鈭?2 A/div
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