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TPS54315 Datasheet(PDF) 10 Page - Texas Instruments

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Part # TPS54315
Description  3-V TO 6-V INPUT, 3-A OUTPUT SYNCHRONOUS-BUCK PWM SWITCHER WITH INTEGRATED FETs
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TPS54315 Datasheet(HTML) 10 Page - Texas Instruments

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TPS54311, TPS54312
TPS54313, TPS54314
TPS54315, TPS54316
SLVS416A – FEBRUARY 2002 – JULY 2003
www.ti.com
10
PERFORMANCE GRAPHS
50
60
70
80
90
100
01
2
3
4
5
Load Current – A
EFFICIENCY
vs
LOAD CURRENT
3.3 VI
5 VI
Efficiency at 700 kHz
Figure 12
Figure 13
1.7
1.75
1.8
1.85
1.9
01
23
4
5
IL – Load Current – A
OUTPUT VOLTAGE
vs
LOAD CURRENT
3.3 VI
5 VI
–30
–15
0
30
45
60
100
1 k
10 k
100 k
1 M
–90
–45
0
45
90
180
f – Frequency – Hz
LOOP RESPONSE
Gain
Phase
15
135
Figure 14
VO (AC)
10 mV/div
VI = 5 V
IO = 3 A
400 ns/div
OUTPUT RIPPLE VOLTAGE
Time – 100
µs/div
Figure 15
Figure 16
Figure 17
VO 50 mV/div
LOAD TRANSIENT RESPONSE
IO 2 A/div
Time – 10
µs/div
VI 2 V/div
VO 2 V/div
VPWRGD 5 V/div
START-UP WAVEFORMS
Time – 2 ms/div
VI = 5 V
75
55
35
01
2
85
95
AMBIENT TEMPERATURE
vs
LOAD CURRENT
125
34
115
45
25
65
105
IL – Load Current – A
Safe Operating Area†
† Safe operating area is applicable to the test
board conditions listed in the Dissipation Rating
Table section of this data sheet.
Figure 18


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