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TPS54350PWPG4 Fiches technique(PDF) 11 Page - Texas Instruments

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No de pièce TPS54350PWPG4
Description  4.5-V TO 20-V INPUT, 3-A OUTPUT SYNCHRONOUS PWM SWITCHER WITH INTEGRATER FET
Download  34 Pages
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

TPS54350PWPG4 Fiches technique(HTML) 11 Page - Texas Instruments

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TPS54350
SLVS456C − OCTOBER 2003 − REVISED OCTOBER 2004
www.ti.com
11
TYPICAL CHARACTERISTICS
Figure 5
−60
−50
−40
−30
−20
−10
0
10
20
30
40
50
60
VI = 12 V
VO = 3.3 V
IO = 3 A
fS = 500 kHz
See Figure 24
f − Frequency − Hz
10
1k
1M
10k
100k
180
150
30
60
120
90
−90
−120
−150
−180
−60
−30
0
LOOP RESPONSE
Phase
Gain
Figure 6
−0.2
−0.1
0.0
0.1
0.2
0.0
0.5
1.0
1.5
2.0
2.5
3.0
LOAD REGULATION
See Figure 24
IO − Output Current − A
VI = 12 V
VI = 6 V
VI = 18 V
Figure 7
−0.10
−0.05
0.00
0.05
0.10
6
8
10
12
14
16
18
LINE REGULATION
See Figure 24
VI − Input Voltage − V
1.5 A
0 A
3 A
Figure 8
50
55
60
65
70
75
80
85
90
95
100
0.0
0.5
1.0
1.5
2.0
2.5
3.0
EFFICIENCY
vs
OUTPUT CURRENT
IO − Output Current − A
VI = 6 V
VI = 18 V
VO = 3.3 V
fS = 500 kHz
See Figure 24
VI = 12 V
Figure 9
VI = 12 V, VO = 3.3 V, IO = 3 A, fS = 500 kHz
INPUT RIPPLE VOLTAGE
Time − 1
µs/div
VI(Ripple) = 100 mV/div (ac coupled)
V(PH) = 5V/div
See Figure 24
Figure 10
OUTPUT RIPPLE VOLTAGE
Time − 1
µs/div
VO = 20 mV/div (ac)
VI = 12 V, VO = 3.3 V, IO = 3 A, fS = 500 kHz
V(PH) = 5 V/div
See Figure 24
Figure 11
PH PIN VOLTAGE
Time − 1
µs/div
V(LSG) = 5 V/div
VI = 12 V, VO = 3.3 V, IO = 3 A, fS = 500 kHz
V(PH) = 5 V/div
See Figure 24
Figure 12
LOAD TRANSIENT RESPONSE
Time − 200
µs/div
VO = 10 mV/div (ac coupled)
VI = 12 V, VO = 3.3 V
IO = 3 A, fS = 500 kHz
See Figure 24
IO = 1 A/div
Figure 13
POWER UP
Time − 2 ms/div
VO = 2 V/div
See Figure 24
VI = 5 V/div
V(PWRGD) = 2 V/div


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