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L5991 Datasheet(PDF) 5 Page - STMicroelectronics

Part No. L5991
Description  PRIMARY CONTROLLER WITH STANDBY
Download  23 Pages
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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L5991 Datasheet(HTML) 5 Page - STMicroelectronics

 
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8
1 0
1 21 4
1 61 8
2 02 22 4
7.0
7.5
8.0
8.5
9.0
V c c
[V ]
Iq [m A ]
V 14 = 0, V 5 = V ref
R t = 4.5Koh m ,T j = 25 °C
5 00K hz
3 00K hz
1M h z
1 00K hz
Figure 3. Quiescent current vs. input voltage.
0
5
10
15
20
25
4.9
4.95
5
5.05
5.1
Iref [mA]
Vref [V]
Vcc=15V
Tj = 25°C
Figure 7. Reference voltage vs. load current.
-50
-25
0
25
50
75
100
125
150
4.9
4.95
5
5.05
5.1
Tj (°C)
Vref [V])
Vcc = 15V
Iref = 1mA
Figure 8. Vref vs. junction temperature.
8
1 01 2
1 41 61 82 02 2
0
6
12
18
24
30
36
Vc c [V ]
Iq [m A ]
Co = 1 n F, T j = 2 5 °C
DC = 0 %
1M H z
500KH z
300KH z
100KH z
Figure 4. Quiescent current vs. input voltage
and switching frequency.
8
10
121416
1820
22
0
6
12
18
24
30
36
Vcc [V]
Iq [mA]
Co = 1nF, Tj = 25°C
DC = 100%
1MHz
500KHz
300KHz
100KHz
Figure 5. Quiescent current vs. input voltage
and switching frequency.
-50
-25
0
25
50
75
100
125
150
0.01
0.1
1
10
100
Junction temperature [˚C]
[mA]
Start-up current
Vc=Vcc= Vccon-0.5V, before turn-on
Operating current
Vcc =15V, after turn-on
RT=13.3k
Ω, CT=1nF
DC=75%, Co=1nF
Quiescent current
Vcc =15V, after turn-on
RT=13.3 k
Ω, CT=1nF
DC = 0
Figure 6. IC Consumption vs. Temperature.
L5991 - L5991A
5/23


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