TPS54361-Q1 Datasheet, PDF (38/50 Pages) Texas Instruments – TPS54361-Q1 4.5-V to 60-V Input, 3.5-A, Step Down DC-DC Converter with Soft-Start and Eco-mode

TPS54361-Q1
SLVSCC4A – APRIL 2014 – REVISED APRIL 2014
100
95
90
85
80
75
70
65
60
0
0.5
1
V_O = 5 V
1.5
2
2.5
Output Current (A)
ƒ_S = 600 kHz
VI =7V
V I = 12 V
V _I = 24 V
V I = 36 V
V I = 48 V
V _I = 60 V
3
3.5
D030
Figure 61. Efficiency Versus Load Current
100
95
90
VI =6V
V I = 12 V
V I = 24 V
V I = 36 V
V I = 48 V
V I = 60 V
85
80
75
70
65
60
0
0.5
1
1.5
2
2.5
3
3.5
Output Current (A)
D032
V_O = 3.3 V
ƒ_S = 600 kHz
Figure 63. Efficiency Versus Load Current
60
180
Gain
Phase
40
120
20
60
0
0
-20
-60
-40
-120
-60
10
100
V_O = 5 V
V_I = 12 V
1000
Frequency (Hz)
10000
ƒ_S = 600 kHz
-180
100000
D036
I_O = 3.5 A
Figure 65. Overall Loop-Frequency Response
100
90
80
70
60
50
40
30
20
10
0
0.001
V_O = 5 V
0.01
0.1
Output Current (A)
ƒ_S = 600 kHz
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V_I =7V
V _I = 12 V
V _I = 24 V
V _I = 36 V
V _I = 48 V
V _I = 60 V
1
D031
Figure 62. Light-Load Efficiency
100
90
80
70
60
50
40
30
20
10
0
0.001
V_O = 3.3 V
0.01
0.1
Output Current (A)
ƒ_S = 600 kHz
V_I =6V
V _I = 12 V
V _I = 24 V
V _I = 36 V
V _I = 48 V
V _I = 60 V
1
D034
Figure 64. Light-Load Efficiency
0.1
0.08
0.06
0.04
0.02
0
-0.02
-0.04
-0.06
-0.08
-0.1
0
0.5
1
V_O = 5 V
1.5
2
2.5
Output Current (A)
ƒ_S = 600 kHz
3
3.5
D033
V_I = 12 V
Figure 66. Regulation Versus Load Current
38
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