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TPS54314 Datasheet(PDF) 7 Page - Texas Instruments

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Part # TPS54314
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

TPS54314 Datasheet(HTML) 7 Page - Texas Instruments

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TPS54311, TPS54312
TPS54313, TPS54314
TPS54315, TPS54316
SLVS416A – FEBRUARY 2002 – JULY 2003
www.ti.com
7
TYPICAL CHARACTERISTICS
Figure 1
0
20
40
60
80
100
120
–40
0
25
85
125
IO = 3 A
VI = 3.3 V
TJ – Junction Temperature – °C
DRAIN-SOURCE ON-STATE RESISTANCE
vs
JUNCTION TEMPERATURE
Figure 2
0
20
40
60
80
100
–40
0
25
85
125
IO = 3 A
VI = 5 V
TJ – Junction Temperature – °C
DRAIN-SOURCE ON-STATE RESISTANCE
vs
JUNCTION TEMPERATURE
Figure 3
450
–40
0
25
550
INTERNALLY SET OSCILLATOR
FREQUENCY
vs
JUNCTION TEMPERATURE
750
85
125
650
350
250
TJ – Junction Temperature – °C
FSEL
≥ 2.5 V
FSEL
≤ 0.8 V
Figure 4
400
–40
0
25
500
EXTERNALLY SET OSCILLATOR
FREQUENCY
vs
JUNCTION TEMPERATURE
800
85
125
700
300
200
TJ – Junction Temperature – °C
600
RT = 68 k
RT = 100 k
RT = 180 k
Figure 5
0.889
–40
0
25
VOLTAGE REFERENCE
vs
JUNCTION TEMPERATURE
0.895
85
125
0.893
0.887
0.885
TJ – Junction Temperature – °C
0.891
Figure 6
0.8850
0.8870
0.8890
0.8910
0.8930
0.8950
34
56
f = 350 kHz
TA = 85°C
VI – Input Voltage – V
OUTPUT VOLTAGE REGULATION
vs
INPUT VOLTAGE
Figure 7
f – Frequency – Hz
60
40
0
0
10
100
1 k
10 k 100 k 1 M
80
100
ERROR AMPLIFIER
OPEN LOOP RESPONSE
140
10 M
120
20
–20
0
–20
–40
–60
–80
–100
–120
–140
–160
–180
–200
RL= 10 kΩ,
CL = 160 pF,
TA = 25°C
Phase
Gain
Figure 8
TJ – Junction Temperature – °C
3.35
3.20
2.90
–40
0
25
85
3.50
3.65
INTERNAL SLOW-START TIME
vs
JUNCTION TEMPERATURE
125
3.80
3.05
2.75
0
0.25
0.5
0.75
1
1.25
1.5
1.75
2
2.25
01
2
3
4
IL – Load Current – A
DEVICE POWER LOSSES
vs
LOAD CURRENT
TJ – 125°C,
fs = 700 kHz
VI = 3.3 V
VI = 5 V
Figure 9


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