L5971 Ver la hoja de datos (PDF) - STMicroelectronics
Número de pieza
componentes Descripción
Fabricante
L5971 Datasheet PDF : 11 Pages
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L5971
Figure 3. Quiescent drain current vs. input
voltage.
Iq
(mA)
D98IN942
5
200KHz
R1=22K
C2=1.2nF
4
3
100KHz;
R1=20K
C2=2.7nF
2
1
0
5 10
0Hz
Tamb=25°C
0% DC
15 20 25 Vcc(V)
Figure 5. Stand-by drain current vs. input
voltage
Ibias
(µA)
D98IN944
150
Vss=GND
140
130
120
110
Tj=25°C
100
90
80
Tj=125°C
70
60
0
5 10 15 20 25 VCC(V)
Figure 7. Switching frquency vs. R1 and C2
fsw
(KHz)
500
D97IN784
Tamb=25°C
200
100
50
20
10
0.82nF
1.2nF
2.2nF
3.3nF
4.7nF
5.6nF
5
0
20
40
60
80 R1(KΩ)
6/11
Figure 4. Quiescent current vs. junction
temperature
Iq
(mA)
5
D98IN943
VCC=20V
0% DC
4
200KHz; R1=22K; C2=1.2nF
3
100KHz; R1=20K; C2=2.7nF
0Hz
2
1
-50 -30 -10 10 30 50 70 90 110 Tj(°C)
Figure 6. Line Regulation
VO
(V)
3.377
D98IN945
3.376
3.375
3.374
Tj=125°C
3.373
3.372
Tj=25°C
3.371
3.370
0
5 10 15 20 25 VCC(V)
Figure 8. Switching Frequency vs. input
voltage.
fsw
(KHz)
D98IN947
107.5
105.0
102.5
100.0
Tj=25°C
97.5
95.0
92.5
90.0
0
5 10 15 20 25 VCC(V)
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