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參數(shù)資料
| 型號(hào)： | TPS54873PWPG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 12 A SWITCHING REGULATOR, 762 kHz SWITCHING FREQ-MAX, PDSO28 |
| 封裝： | GREEN, PLASTIC, HTSSOP-28 |
| 文件頁數(shù)： | 20/22頁 |
| 文件大小： | 605K |
| 代理商： | TPS54873PWPG4 |
TPS54873
SLVS444A OCTOBER 2002 REVISED FEBRUARY 2005
www.ti.com
7
TYPICAL CHARACTERISTICS
Figure 1
0
10
20
30
40
50
60
40
15
10
35
60
85
110
135
VI = 5 V,
IO = 8 A
DRAIN-SOURCE
ON-STATE RESISTANCE
vs
JUNCTION TEMPERATURE
TJ Junction Temperature °C
Drain
Source
On-State
Reststance
m
Figure 2
250
350
450
550
650
750
40
0
25
85
125
TJ Junction Temperature °C
f
Internally
Set
Oscillator
Frequency
kHz
INTERNALLY SET
OSCILLATOR FREQUENCY
vs
JUNCTION TEMPERATURE
SYNC ≥ 2.5 V
SYNC ≤ 0.8 V
Figure 3
200
300
400
500
600
700
800
40
0
25
85
125
TJ Junction Temperature °C
f
Externally
Set
Oscillator
Frequency
kHz
EXTERNALLY SET
OSCILLATOR FREQUENCY
vs
JUNCTION TEMPERATURE
RT = 68 k
RT = 100 k
RT = 180 k
Figure 4
0.885
0.887
0.889
0.891
0.893
0.895
40
0
25
85
125
TJ Junction Temperature °C
V
oltage
Reference
V
VOLTAGE REFERENCE
vs
JUNCTION TEMPERATURE
V
ref
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
012
3
45
67
8
IL Load Current A
Device
Power
Losses
W
DEVICE POWER LOSSES
vs
LOAD CURRENT
TJ = 125°C
fs = 700 kHz
VI = 5 V
Figure 5
Figure 6
VI Input Voltage V
OUTPUT VOLTAGE REGULATION
vs
INPUT VOLTAGE
Output
V
oltage
Regulation
V
O
0.885
0.887
0.889
0.891
0.893
0.895
4.5
4.8
5.1
5.4
5.7
6
Figure 7
20
0
20
40
60
80
100
120
140
1
100
1 k
1 M
200
180
160
140
120
100
80
60
40
20
0
10
10 k 100 k
10 M
f Frequency Hz
Gain
dB
ERROR AMPLIFIER
OPEN LOOP RESPONSE
Phase
Degrees
Phase
Gain
RL = 10 k,
CL = 160 pF,
TA = 25°C
Figure 8
2.75
2.90
3.05
3.20
3.35
3.50
3.65
40
0
25
85
125
TJ Junction Temperature °C
Internal
Slow-Start
Time
ms
INTERNAL SLOW-START TIME
vs
JUNCTION TEMPERATURE
3.80
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