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TPS54873PWP 数据表(PDF) 7 Page - Texas Instruments

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部件名 TPS54873PWP
功能描述  4-V TO 6-V INPUT, 8-A OUTPUT SYNCHRONOUS BUCK SWITCHER WITH DISABLED SINKING DURING START-UP
PDF  15 Pages
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制造商  TI [Texas Instruments]
网页  http://www.ti.com
标志 TI - Texas Instruments

TPS54873PWP 数据表(HTML) 7 Page - Texas Instruments

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TPS54873
SLVS444 – OCTOBER 2002
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
Figure 2
250
350
450
550
650
750
–40
0
25
85
125
TJ – Junction Temperature – °C
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
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
VOLTAGE REFERENCE
vs
JUNCTION TEMPERATURE
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
0
1
2
3
4
56
78
IL – Load Current – A
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
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
ERROR AMPLIFIER
OPEN LOOP RESPONSE
Phase
Gain
RL = 10 kΩ,
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
vs
JUNCTION TEMPERATURE
3.80



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