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L78 数据表(PDF) 30 Page - STMicroelectronics

部件名 L78
功能描述  Positive voltage regulator ICs
PDF  55 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

L78 数据表(HTML) 30 Page - STMicroelectronics

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7
Typical performance
Figure 29. Dropout voltage vs junction temperature
VI-Vo
(V)
-75
2
-50
-25
0
25
50
75
100
125
Tj (°C)
L78XX
GAMG200920161325MT
0
1.5
1
0.5
I
O
= 1 A
I = 500
mA
I = 200
mA
I = 20
mA
I = 0 mA
∆VO = 5% of VO
DROPOUT CONDITIONS
O
O
O
O
Figure 30. Peak output current vs input/output differential
voltage
Io(A)
0
2.5
2
5
10
15
20
25
Vi-VO (V)
L7805
GAMG200920161324MT
1.5
1
0.5
Tj =
55
°C
Tj =
0 °C
Tj =
125
°C
Tj
= 150
°C
Tj
= 25
°C
Figure 31. Supply voltage rejection vs frequency
Vi = 8 V to 18 V
Vo = 5 V
Tj = 25 °C
Io = 500 mA
L7805
SVR
(dB)
20
0
10
102
103
104
f (Hz)
GAMG200920161322MT
40
60
80
Figure 32. Output voltage vs junction temperature
Vo
(V)
-75
12.1
12.0
-50
-25
0
25
50
75
100
125
Tj (°C)
Vi = 19 V
Vo = 12 V
Io = 20 mA
L7812
GAMG200920161323MT
11.9
11.8
L78
Typical performance
DS0422 - Rev 36
page 30/55



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