L4973D3.3 Ver la hoja de datos (PDF) - STMicroelectronics
Número de pieza
componentes Descripción
Fabricante
L4973D3.3 Datasheet PDF : 16 Pages
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Figure 22: Efficiency vs. Output Current
(see fig.1d)
η
D97IN662
(%)
90
Vcc=12V
VO = 3.3V
fsw = 200KHz
85
Vcc=24V
80
Vcc=48V
75
70
0 0.5 1 1.5 2 2.5 3 3.5 IO(A)
Figure 24: Power dissipation vs. Output Voltage
(Device only)
Pdiss
(W)
D97IN648
3.0
VCC = 35V
fsw = 100KHz
2.5
IO=3.5A
2.0
IO=3A
1.5
IO=2.5A
1.0
IO=2A
0.5
IO=1A
0
0 5 10 15 20 25 30 VO(V)
Figure 26: Load Transient
IO
(A)
3
2
1
T
2
200µs/DIV
T
1
D97IN649
VCC = 35V
fsw = 100KHz
VO
(mV)
100
0
-100
L4973V3 - L4973V5 - L4973D3 - L4973D5
Figure 23: Power dissipation vs. Input Voltage
(Device only) (see fig.1c)
Pdiss
(W)
1.5
IO=3.5A
D97IN647A
VO = 5.1V
fsw = 100KHz
IO=3A
1.0
IO=2.5A
0.5
IO=2A
0
0 10 20 30 40 50 Vcc(V)
Figure 25: Pulse by Pulse Limiting Current vs.
Junction Temperature
Ilim
D97IN652
(A)
5.2
5
4.8
Vcc=35
4.6
4.4
4.2
-40 -20 0 20 40 60 80 100 120 Tj(°C)
Figure 27: Line Transient
VCC
(V)
30
20
10
1
2
1ms/DIV
D97IN650
IO = 1A
fsw = 100KHz
VO
(mV)
100
0
-100
11/16
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