參數(shù)資料
型號(hào): TPS56121DQPT
廠商: TEXAS INSTRUMENTS INC
元件分類: 穩(wěn)壓器
英文描述: SWITCHING CONTROLLER, 1100 kHz SWITCHING FREQ-MAX, PDSO22
封裝: ROHS COMPLIANT, PLASTIC, SON-22
文件頁數(shù): 25/25頁
文件大小: 653K
代理商: TPS56121DQPT
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5
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110 125
Junction Temperature (°C)
HighSide
Overcurrent
Threshold
(A)
VVDD = 4.5 V
VVDD = 12 V
450
500
550
600
650
700
750
40 25 10
5
20
35
50
65
80
95
110 125
Junction Temperature (°C)
PowerGood
Threshold
Voltage
(mV)
VOV
VUV
50
60
70
80
90
100
0
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15
Load Current (A)
Efficiency
(%)
VOUT = 0.8 V
VOUT = 1.0 V
VOUT = 1.2 V
VOUT = 1.8 V
VOUT = 2.5 V
VOUT = 3.3 V
fSW = 500 kHz
VVIN = 12 V
TA = 25°C
70
75
80
85
90
95
100
0
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15
Load Current (A)
Efficiency
(%)
VOUT = 0.8 V
VOUT = 1.0 V
VOUT = 1.2 V
VOUT = 1.8 V
VOUT = 2.5 V
fSW = 500 kHz
VVIN = 5 V
TA = 25°C
0
2
4
6
8
10
12
14
16
0
10
20
30
40
50
60
70
80
90
100 110
Ambient Temperature (°C)
Output
Current
(A)
VOUT = 0.8 V
VOUT = 1.0 V
VOUT = 1.2 V
VOUT = 1.8 V
VOUT = 2.5 V
VOUT = 3.3 V
VVIN = 12 V
0
2
4
6
8
10
12
14
16
0
20
40
60
80
100 110
Ambient Temperature (°C)
Output
Current
(A)
VOUT = 0.8 V
VOUT = 1.0 V
VOUT = 1.2 V
VOUT = 1.8 V
VOUT = 2.5 V
VVIN = 5 V
SLUSAH4
– MARCH 2011
TYPICAL CHARACTERISTICS
The efficiency curve shown in Figure 15 is measured with a 0.5-
H output inductor and a maximum DCR of 0.75 mΩ.
The efficiency curve shown in Figure 16 is measured with a 0.3-
H output inductor and a maximum DCR of 0.54 mΩ.
The power derating curves shown in Figure 17 and Figure 18 are measured on a 4
" × 3.25", 0.062" thick FR4 board
with 6 layers and 1 oz. copper.
Figure 13. High-Side Overcurrent Threshold vs. Junction
Figure 14. Power Good Threshold Voltage vs. Junction
Temperature
Figure 15. Efficiency vs. Load Current (VVIN = 12 V)
Figure 16. Efficiency vs. Load Current (VVIN = 5 V)
Figure 17. Output Current vs. Ambient Temperature
Figure 18. Output Current vs. Ambient Temperature
(VVIN = 12 V)
(VVIN = 5 V)
Copyright
2011, Texas Instruments Incorporated
9
Product Folder Link(s) :TPS56121
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