參數資料
型號: MC7818
廠商: ON SEMICONDUCTOR
元件分類: 基準電壓源/電流源
英文描述: 1.0 A Positive Voltage Regulators
中文描述: 1.0A正電壓穩(wěn)壓器
文件頁數: 21/32頁
文件大?。?/td> 270K
代理商: MC7818
MC7800, MC7800A, NCV7805
http://onsemi.com
21
Figure 12. Worst Case Power Dissipation versus
Ambient Temperature (Case 221A)
Figure 13. Input Output Differential as a Function
of Junction Temperature (MC78XXC, AC, B)
,
D
P
20
16
12
8.0
4.0
050
-25
0
T
A
, AMBIENT TEMPERATURE (
°
C)
25
50
75
100
125
150
HS
= 0
°
C/W
D
i
V
o
-
0.5
0-75
-50
-25
T
J
, JUNCTION TEMPERATURE (
°
C)
0
25
50
75
100
125
I
O
= 0 mA
I
O
= 20 mA
I
O
= 1.0 A
I
O
= 500 mA
I
O
= 200 mA
V
O
= 2% of V
O
- - -
Extended Curve for MC78XXB
JC
= 5
°
C/W
JA
= 65
°
C/W
T
J(max)
= 150
°
C
HS
= 5
°
C/W
HS
= 15
°
C/W
No Heatsink
2.0
1.5
1.0
2.5
Figure 14. D
2
PAK Thermal Resistance and Maximum
Power Dissipation versus P.C.B. Copper Length
R
θ
,
J
J
°
30
40
50
60
70
80
1.0
1.5
2.0
2.5
3.0
3.5
0
10
20
30
25
15
5.0
L, LENGTH OF COPPER (mm)
P
D(max)
for T
A
= 50
°
C
Minimum
Size Pad
2.0 oz. Copper
L
Free Air
Mounted
Vertically
PD
R
JA
40
50
60
70
80
90
100
0
0.4
0.8
1.2
1.6
2.0
2.4
0
10
20
30
25
15
5.0
L, LENGTH OF COPPER (mm)
P
D(max)
for T
A
= 50
°
C
Minimum
Size Pad
PD
L
,
Free Air
Mounted
Vertically
R
JA
2.0 oz. Copper
R
θ
,
J
J
°
Figure 15. DPAK Thermal Resistance and Maximum
Power Dissipation versus P.C.B. Copper Length
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