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参数资料
| 型号： | TPS54873PWPR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 12 A SWITCHING REGULATOR, 762 kHz SWITCHING FREQ-MAX, PDSO28 |
| 封装： | GREEN, PLASTIC, HTSSOP-28 |
| 文件页数： | 4/22页 |
| 文件大小： | 605K |
| 代理商： | TPS54873PWPR |
TPS54873
SLVS444A OCTOBER 2002 REVISED FEBRUARY 2005
www.ti.com
12
PERFORMANCE GRAPHS
Figure 12
50
55
60
65
70
75
80
85
90
95
100
0
1
23
4
5
67
8
9
VI = 5 V,
VO = 3.3 V
Efficiency
%
EFFICIENCY
vs
OUTPUT CURRENT
IO Output Current A
Figure 13
3.28
3.285
3.29
3.295
3.3
3.305
3.31
3.315
3.32
0
1
2
34
56
78
9
Output
V
o
lt
ag
e
V
OUTPUT VOLTAGE
vs
OUTPUT CURRENT
IO Output Current A
V O
Figure 14
3.28
3.285
3.29
3.295
3.3
3.305
3.31
3.315
3.32
4
4.5
5
5.5
6
IO = 0
IO = 8
IO = 4
VI Input Voltage V
Output
V
o
lt
ag
e
V
OUTPUT VOLTAGE
vs
INPUT VOLTAGE
V O
Figure 15
20
0
20
40
60
100
1 k
10 k
100 k
1 M
0
45
90
135
180
f Frequency Hz
Gain
dB
LOOP RESPONSE
Phase
Degrees
Phase
Gain
VI = 5 V,
VO = 3.3 V,
IO = 6 A,
TA = 25°C,
FS = 550 kHz
Figure 16
25
35
45
55
65
75
85
95
105
115
125
0
123
4
Ambient
Temperature
AMBIENT TEMPERATURE
vs
OUTPUT CURRENT
IO Output Current A
C°
T
A
56
7
8
VI = 5 V
TJ = 25°C
fs = 700 kHz
Figure 17
Time 1 s/div
OUTPUT RIPPLE VOLTAGE
Output
Ripple
V
oltage
10
mV/div
Figure 18
100 s/div
50
mV/div
LOAD TRANSIENT RESPONSE
VI = 5 V,
1A to 5A,
Figure 19
5.0 ms/div
1V/div
START-UP WAVEFORM
VO = 3.3 V
VI = 5 V
DETAILED DESCRIPTION
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