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参数资料
| 型号： | TPS54680PWP |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 12 A SWITCHING REGULATOR, 762 kHz SWITCHING FREQ-MAX, PDSO28 |
| 封装： | GREEN, PLASTIC, HTSSOP-28 |
| 文件页数： | 4/24页 |
| 文件大小： | 714K |
| 代理商： | TPS54680PWP |
TPS54680
SLVS429B OCTOBER 2002 REVISED OCTOBER 2005
www.ti.com
12
PERFORMANCE GRAPHS
Figure 12
60
65
70
75
80
85
90
95
0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6
IO Output Current A
Efficiency
%
EFFICIENCY
vs
OUTPUT CURRENT
VO = 1.8 V
VO = 1.2 V
VO = 0.9 V
VI = 3.3 V,
FS = 700 kHz,
VO = 0.9 V, 1.8 V and 2.5 V
Figure 13
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6
0.20
0.15
0.10
0.05
0
0.05
0.10
0.15
0.20
VO = 1.8 V
VO = 1.2 V
VO = 0.9 V
TA = 25°C,
VI = 3.3 V,
FS = 700 kHz,
VO = 0.9 V, 1.2 V and 1.8 V
Load
Regulation
%
LOAD REGULATION
vs
OUTPUT CURRENT
IO Output Current A
Figure 14
0.20
0.15
0.10
0.05
0
0.05
0.10
0.15
0.20
3
3.5
4
4.5
5
5.5
6
IO = 6 A
IO = 0 A
TA = 25°C,
FS = 700 kHz,
VO = 1.8 V
VI Input Voltage V
Line
Regulation
%
LINE REGULATION
vs
INPUT VOLTAGE
Figure 15
60
50
40
30
20
10
0
10
20
30
40
50
60
180
150
120
90
60
30
0
30
60
90
120
150
180
Phase
Gain
f Frequency Hz
Gain
dB
LOOP RESPONSE
Phase
Degrees
VI = 5 V,
IO = 0 A,
fS = 700 kHz
100
1 k
10 k
100 k
1 M
Figure 16
25
35
45
55
65
75
85
95
105
115
125
0123
4
5
678
Ambient
T
emperature
AMBIENT TEMPERATURE
vs
LOAD CURRENT
C°
IO Output Current A
TJ = 125°C
fs = 700 kHz
VI = 3.3 V
VI = 5 V
Safe Operating Area(1)
Figure 17
OUTPUT AND INPUT RIPPLE
t Time 1 s/div
Input
Ripple
100
mV/div
Output
Ripple
20
mV/div
Phase
Pin
2
V/div
Figure 18
t Time 20 s/div
LOAD TRANSIENT RESPONSE
Output
Voltage
100
mV/div
V O
Load
Current
2A/div
VI = 5 V,
VO = 1.8 V
Figure 19
t Time 500 s/div
Output
Voltage
1
V/div
STARTUP TIMING
V O
Power
Good
5
V/div
VI = 5 V
fs = 700 kHz
I/O
CORE
PWRGD(I/O)
PWRGD(CORE)
Figure 20
t Time 20 s/div
POWER DOWN TIMING
Output
Voltage
1
V/div
V O
Power
Good
5
V/div
I/O
CORE
PWRGD(I/O)
PWRGD(CORE)
(1) Safe operating area is applicable to the test board conditions in the Dissipation Ratings
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