L5991A(1999) Просмотр технического описания (PDF) - STMicroelectronics
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L5991A Datasheet PDF : 19 Pages
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L5991 - L5991A
Figure 3. Quiescent current vs. input voltage.
Iq [m A]
9 .0
8 .5
8 .0
V 14 = 0, V5 = V ref
R t = 4.5Koh m ,Tj = 25 °C
1M hz
500Khz
300Khz
100Khz
7 .5
7 .0
8
10 12 14 16 18 20 22 24
Vc c [V ]
Figure 5. Quiescent current vs. input voltage
and switching frequency.
Iq [mA]
36
Co= 1nF, Tj = 25°C
30
DC = 100%
24
1MHz
18
500KHz
300KHz
12
100KHz
6
0
8
10
12
14
16
18
20
22
Vcc [V]
Figure 7. Vref vs. junction temperature.
Vref [V])
5.1
5.05
5
Vcc = 15V
Iref = 1mA
Figure 4. Quiescent current vs. input voltage
and switching frequency.
Iq [mA]
36
30
C o = 1 n F, T j = 2 5 °C
DC = 0%
24
18
12
6
1M Hz
500KHz
300K Hz
100K Hz
0
8
10
12
14
16
18
20
22
Vcc [V]
Figure 6. Reference voltage vs. load current.
Vref [V]
5.1
5.05
5
Vcc=15V
Tj = 25°C
4.95
4.9
0
5
10
15
20
25
Iref [mA]
Figure 8. Vref vs. junction temperature.
Vref [V]
5.1
5.05
Vcc = 15V
Iref= 20mA
5
4.95
4.95
4.9
-50 -25 0
25 50 75 100 125 150
Tj (°C)
4.9
-50 -25 0 25 50 75 100 125 150
Tj (°C)
5/23
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