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L4973D3 データシート(PDF) 10 Page - STMicroelectronics

部品番号 L4973D3
部品情報  3.5A STEP DOWN SWITCHING REGULATOR
PDF  16 Pages
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メーカー  STMICROELECTRONICS [STMicroelectronics]
ホームページ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L4973D3 データシート(HTML) 10 Page - STMicroelectronics

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background image
0
123
IO(A)
0
0.2
0.4
0.6
∆V
(V)
D97IN643
Tj=0
°C
Tj=125
°C
Tj=25
°C
Figure 16: Dropout Voltage Between pin 7,8 and
2,3
010
20
30
VO(V)
40
86
88
90
92
η
(%)
94
96
98
D97IN641
200KHz
100KHz
IO = 3A
VCC = 50V
Figure 17: Efficiency vs. Output Voltage
(see fig.1)
0
101520
VO(V)
30
525
86
88
90
92
η
(%)
94
96
98
D97IN642
200KHz
100KHz
IO = 3A
VCC = 35V
Figure 18: Efficiency vs. Output Voltage
(Diode STPS745D)
01
23
IO(A)
80
85
90
95
η
(%)
D97IN645
Vcc=12V
Vcc=24V
Vcc=48V
VO = 5.1V
fsw = 100KHz
Figure 19: Efficiency vs. Output Current
( see fig.1c)
01
23
IO(A)
75
80
85
90
η
(%)
D97IN646
Vcc=12V
Vcc=24V
Vcc=48V
VO = 5.1V
fsw = 200KHz
Figure 20: Efficiency vs. Output Current
(see fig.1c)
01
23
IO(A)
75
80
85
90
η
(%)
D97IN644
Vcc=12V
Vcc=24V
Vcc=48V
VO = 3.3V
fsw = 100KHz
Figure 21: Efficiency vs. Output Current
(see fig.1d)
L4973V3.3 - L4973V5.1 - L4973D3.3 - L4973D5.1
10/16



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