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TPS54478RTER Datasheet(PDF) 9 Page - Texas Instruments

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No. de pieza TPS54478RTER
Descripción Electrónicos  2.95-V to 6-V Input, 4-A Output, 2-MHz, Synchronous Step-Down
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Fabricante Electrónico  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
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TPS54478RTER Datasheet(HTML) 9 Page - Texas Instruments

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background image
-3
-2.9
-2.8
-2.7
-2.6
-2.5
-2.4
-2.3
-2.2
-2.1
-2
Vin = 3.3 V; Vss = 0.4 V
Vin = 5 V; Vss = 0.4 V
-50
-25
0
25
50
75
100
125
150
T - Junction Temperature - °C
J
40
50
60
70
80
90
100
V
= 5 V
IN
-50
-25
0
25
50
75
100
125
150
T - Junction Temperature - °C
J
88
90
92
94
96
98
100
102
104
106
108
110
Vsense (Good) Falling
Vsense (Fault) Rising
Vsense (Fault) Falling
Vsense (Good) Falling
-50
-25
0
25
50
75
100
125
150
T - Junction Temperature - °C
J
0
2
4
6
8
10
12
14
16
18
20
V
= 5.5 V
IN
-50
-25
0
25
50
75
100
125
150
T - Junction Temperature - °C
J
0
0.5
1
1.5
2
2.5
3
3.5
4
I - Output Current - A
O
50
55
60
65
70
75
80
85
90
95
100
Vin = 5 V,
DCR = 6.8 m ,
Fs = 1 MHz,
Tj = 25°C
W
V = 3.3 V
O
V = 2.5 V
O
V = 1.8 V
O
V = 1.2 V
O
V = 1 V
O
50
55
60
65
70
75
80
85
90
95
100
V = 2.5 V
O
Vin = 3.3 V,
DCR = 6.8 m ,
Fs = 1 MHz,
Tj = 25°C
W
0
0.5
1
1.5
2
2.5
3
3.5
4
I - Output Current - A
O
V = 1.8 V
O
V = 1.2 V
O
V = 1 V
O
TPS54478
www.ti.com
SLVSAS2
– JUNE 2011
TYPICAL CHARACTERISTICS CURVES (continued)
SS CHARGE CURRENT vs TEMPERATURE
PWRGD Rdson vs TEMPERATURE
Figure 13.
Figure 14.
PWRGD THRESHOLD vs TEMPERATURE
PWRGD LEAKAGE CURRENT vs TEMPERATURE
Figure 15.
Figure 16.
EFFICIENCY vs LOAD CURRENT
EFFICIENCY vs LOAD CURRENT
Figure 17.
Figure 18.
Copyright
© 2011, Texas Instruments Incorporated
9


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