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參數(shù)資料
| 型號： | LM340A |
| 廠商： | ON SEMICONDUCTOR |
| 英文描述： | 1.0 A Positive Voltage Regulators(1.0 A 正向穩(wěn)壓器) |
| 中文描述： | 1.0一個正電壓穩(wěn)壓器（1.0甲正向穩(wěn)壓器） |
| 文件頁數(shù)： | 11/20頁 |
| 文件大小： | 204K |
| 代理商： | LM340A |
MC7800, MC7800A, LM340, LM340A Series, NCV7805
http://onsemi.com
11
ELECTRICAL CHARACTERISTICS
(V
in
= 27 V, I
O
= 1.0 A, T
J
= T
low
to T
high
[Note 1], unless otherwise noted.)
MC7818AC
Characteristic
Symbol
Min
Typ
Max
Unit
Output Voltage (T
J
= 25
°
C)
V
O
17.64
18
18.36
Vdc
Output Voltage (5.0 mA
≤
I
O
≤
1.0 A, P
D
≤
15 W)
21 Vdc
≤
V
in
≤
33 Vdc
Line Regulation (Note 2)
21 Vdc
≤
V
in
≤
33 Vdc, I
O
= 500 mA
24 Vdc
≤
V
in
≤
30 Vdc, I
O
= 1.0 A
24 Vdc
≤
V
in
≤
30 Vdc, I
O
= 1.0 A, T
J
= 25
°
C
20.6 Vdc
≤
V
in
≤
33 Vdc, I
O
= 1.0 A, T
J
= 25
°
C
Load Regulation (Note 2)
5.0 mA
≤
I
O
≤
1.5 A, T
J
= 25
°
C
5.0 mA
≤
I
O
≤
1.0 A
250 mA
≤
I
O
≤
750 mA
Quiescent Current
V
O
17.3
18
18.7
Vdc
Reg
line
mV
–
–
–
–
9.5
3.2
3.2
8.0
22
25
10.5
22
Reg
load
mV
–
–
–
2.0
1.8
1.5
25
25
15
I
B
–
3.5
6.0
mA
Quiescent Current Change
21 Vdc
≤
V
in
≤
33 Vdc, I
O
= 500 mA
21.5 Vdc
≤
V
in
≤
30 Vdc, T
J
= 25
°
C
5.0 mA
≤
I
O
≤
1.0 A
Ripple Rejection
22 Vdc
≤
V
in
≤
32 Vdc, f = 120 Hz, I
O
= 500 mA
Dropout Voltage (I
O
= 1.0 A, T
J
= 25
°
C)
I
B
mA
–
–
–
–
–
–
0.8
0.8
0.5
RR
53
57
–
dB
V
I
– V
O
–
2.0
–
Vdc
Output Noise Voltage (T
A
= 25
°
C)
10 Hz
≤
f
≤
100 kHz
V
n
–
10
–
μ
V/V
O
Output Resistance f = 1.0 kHz
r
O
–
1.3
–
m
Short Circuit Current Limit (T
A
= 25
°
C)
V
in
= 35 Vdc
Peak Output Current (T
J
= 25
°
C)
I
SC
–
0.2
–
A
I
max
–
2.2
–
A
Average Temperature Coefficient of Output Voltage
TCV
O
–
–1.5
–
mV/
°
C
ELECTRICAL CHARACTERISTICS
(V
in
= 33 V, I
O
= 500 mA, T
J
= T
low
to T
high
[Note 1], unless otherwise noted.)
MC7824B
MC7824C
Characteristic
Symbol
Min
Typ
Max
Min
Typ
Max
Unit
Output Voltage (T
J
= 25
°
C)
V
O
23
24
25
23
24
25
Vdc
Output Voltage (5.0 mA
≤
I
O
≤
1.0 A, P
D
≤
15 W)
27 Vdc
≤
V
in
≤
38 Vdc
28 Vdc
≤
V
in
≤
38 Vdc
Line Regulation, (Note 2)
27 Vdc
≤
V
in
≤
38 Vdc
30 Vdc
≤
V
in
≤
36 Vdc
Load Regulation, (Note 2)
5.0 mA
≤
I
O
≤
1.5 A
Quiescent Current
V
O
Vdc
–
–
24
–
22.8
–
24
–
25.2
–
22.8
25.2
Reg
line
mV
–
–
11.5
3.8
480
240
–
–
2.7
2.7
60
48
Reg
load
–
2.1
480
–
4.4
65
mV
I
B
–
3.6
8.0
–
3.6
6.5
mA
Quiescent Current Change
27 Vdc
≤
V
in
≤
38 Vdc
5.0 mA
≤
I
O
≤
1.0 A
1. T
low
= 0
°
C for MC78XXAC, C, LM340AT–XX, LM340T–XX
=
40
°
C for MC78XXB, MC78XXAB, NCV7805
2. Load and line regulation are specified at constant junction temperature. Changes in V
O
due to heating effects must be taken into account
separately. Pulse testing with low duty cycle is used.
I
B
mA
–
–
–
–
–
–
–
–
–
1.0
0.5
0.5
T
high
= +125
°
C for MC78XXAC, C, LM340AT–XX, LM340T–XX, NCV7805
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