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)： 10/20頁
文件大?。?/td> 204K
代理商： LM340A
MC7800, MC7800A, LM340, LM340A Series, NCV7805
http://onsemi.com
10
ELECTRICAL CHARACTERISTICS (continued)
(V
in
= 23 V, I
O
= 1.0 A, T
J
= T
low
to T
high
[Note 1], unless
otherwise noted.)
MC7815AB/MC7815AC/LM340AT–15
Characteristic
Symbol
Min
Typ
Max
Unit
Ripple Rejection
18.5 Vdc
≤
V
in
≤
28.5 Vdc, f = 120 Hz, I
O
= 500 mA
Dropout Voltage (I
O
= 1.0 A, T
J
= 25
°
C)
RR
60
80
–
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
–
1.2
–
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
–
–1.0
–
mV/
°
C
ELECTRICAL CHARACTERISTICS
(V
in
= 27 V, I
O
= 500 mA, T
J
= T
low
to T
high
[Note 1], unless otherwise noted.)
MC7818B
MC7818C
Characteristic
Symbol
Min
Typ
Max
Min
Typ
Max
Unit
Output Voltage (T
J
= 25
°
C)
V
O
17.3
18
18.7
17.3
18
18.7
Vdc
Output Voltage (5.0 mA
≤
I
O
≤
1.0 A, P
D
≤
15 W)
21 Vdc
≤
V
in
≤
33 Vdc
22 Vdc
≤
V
in
≤
33 Vdc
Line Regulation, (Note 2)
21 Vdc
≤
V
in
≤
33 Vdc
24 Vdc
≤
V
in
≤
30 Vdc
Load Regulation, (Note 2)
5.0 mA
≤
I
O
≤
1.5 A
Quiescent Current
V
O
Vdc
–
–
18
–
17.1
–
18
–
18.9
–
17.1
18.9
Reg
line
mV
–
–
9.5
3.2
360
180
–
–
9.5
3.2
50
25
Reg
load
–
2.0
360
–
2.0
55
mV
I
B
–
3.5
8.0
–
3.5
6.5
mA
Quiescent Current Change
21 Vdc
≤
V
in
≤
33 Vdc
5.0 mA
≤
I
O
≤
1.0 A
Ripple Rejection
22 Vdc
≤
V
in
≤
33 Vdc, f = 120 Hz
Dropout Voltage (I
O
= 1.0 A, T
J
= 25
°
C)
I
B
mA
–
–
–
–
–
–
–
–
–
1.0
0.5
0.5
RR
–
57
–
53
57
–
dB
V
iI
– V
O
–
2.0
–
–
2.0
–
Vdc
Output Noise Voltage (T
A
= 25
°
C)
10 Hz
≤
f
≤
100 kHz
V
n
–
10
–
–
10
–
μ
V/V
O
Output Resistance f = 1.0 kHz
r
O
–
1.3
–
–
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
–
–
0.2
–
A
I
max
–
2.2
–
–
2.2
–
A
Average Temperature Coefficient of Output Voltage
TCV
O
–
–1.5
–
–
–1.5
–
mV/
°
C
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.
T
high
= +125
°
C for MC78XXAC, C, LM340AT–XX, LM340T–XX, NCV7805
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