LM340AT-18 [MOTOROLA]
THREE TERMINAL POSITIVE FIXED VOLTAGE REGULATORS; 三端固定正稳压器型号: | LM340AT-18 |
厂家: | MOTOROLA |
描述: | THREE TERMINAL POSITIVE FIXED VOLTAGE REGULATORS |
文件: | 总16页 (文件大小:282K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
Order this document by MC7800/D
These voltage regulators are monolithic integrated circuits designed as
fixed–voltage regulators for a wide variety of applications including local,
on–card regulation. These regulators employ internal current limiting,
thermal shutdown, and safe–area compensation. With adequate heatsinking
they can deliver output currents in excess of 1.0 A. Although designed
primarily as a fixed voltage regulator, these devices can be used with
external components to obtain adjustable voltages and currents.
THREE–TERMINAL
POSITIVE FIXED
VOLTAGE REGULATORS
SEMICONDUCTOR
TECHNICAL DATA
• Output Current in Excess of 1.0 A
• No External Components Required
• Internal Thermal Overload Protection
• Internal Short Circuit Current Limiting
• Output Transistor Safe–Area Compensation
• Output Voltage Offered in 2% and 4% Tolerance
T SUFFIX
PLASTIC PACKAGE
CASE 221A
Heatsink surface
connected to Pin 2.
2
• Available in Surface Mount D PAK and Standard 3–Lead Transistor
Packages
1
2
• Previous Commercial Temperature Range has been Extended to a
Junction Temperature Range of –40°C to +125°C
3
Pin 1. Input
2. Ground
3. Output
DEVICE TYPE/NOMINAL OUTPUT VOLTAGE
D2T SUFFIX
PLASTIC PACKAGE
CASE 936
MC7805AC
LM340AT–5
MC7805C
MC7812C
12 V
15 V
LM340T–12
MC7815AC
LM340AT–15
MC7815C
2
5.0 V
6.0 V
(D PAK)
2
1
3
LM340T–5
MC7806AC
MC7806C
Heatsink surface (shown as terminal 4 in
case outline drawing) is connected to Pin 2.
LM340T–15
MC7818AC
MC7818C
MC7808AC
MC7808C
8.0 V
9.0 V
12 V
18 V
24 V
STANDARD APPLICATION
MC7809C
MC7824AC
MC7824C
MC78XX
Input
Output
**
MC7812AC
LM340AT–12
C
*
in
C
O
0.33 µF
A common ground is required between the
input and the output voltages. The input voltage
must remain typically 2.0 V above the output
voltage even during the low point on the input
ripple voltage.
ORDERING INFORMATION
Output Voltage
Tolerance
Operating
Temperature Range
Device
Package
MC78XXACT
LM340AT–XX
MC78XXACD2T
MC78XXCT
XX,
These two digits of the type number
indicate nominal voltage.
Insertion Mount
Surface Mount
Insertion Mount
Surface Mount
2%
4%
* C is required if regulator is located an
in
appreciable distance from power supply
filter.
T = –40° to +125°C
J
** C is not needed for stability; however,
O
LM340T–XX
MC78XXCD2T
it does improve transient response. Values
of less than 0.1 µF could cause instability.
XX indicates nominal voltage.
Motorola, Inc. 1997
Rev 5
MC7800, MC7800A, LM340, LM340A Series
MAXIMUM RATINGS (T = 25°C, unless otherwise noted.)
A
Rating
Symbol
Value
Unit
Input Voltage (5.0 – 18 V)
Input Voltage (24 V)
V
I
35
40
Vdc
Power Dissipation
Case 221A
T
A
= 25°C
P
D
Internally Limited
W
Thermal Resistance, Junction–to–Ambient
Thermal Resistance, Junction–to–Case
R
R
65
5.0
°C/W
°C/W
θJA
θJC
2
Case 936 (D PAK)
= 25°C
T
P
R
R
Internally Limited
See Figure 13
5.0
W
°C/W
°C/W
A
D
θJA
θJA
Thermal Resistance, Junction–to–Ambient
Thermal Resistance, Junction–to–Case
Storage Junction Temperature Range
Operating Junction Temperature
T
–65 to +150
+150
°C
°C
stg
T
J
NOTE: ESD data available upon request.
Representative Schematic Diagram
V
in
MC7800
R24
50
D2
Zener
LAT 3 A
Q18
LAT
Q17
R19
27.5 k
Q19
QNPN
Q20
QNPN
C3 1.0 P
R14
1.0 k
Q10
QNPN
R15
680
R18
100 k
R21
600
R23
0.2
R22
100
V
5.01
out
Q7
QNPN
Q5
QNPN 2
R30
18 k
R17
9.0 k
Q12
QNPN
Sense
Q9
QNPN 2
R12
3.0 k
R29
9.0 k
R11
15 k
Q6
QNPN
D1
Zener
Q15
QNPN
R25
6.0 k
R28
9.0 k
R1
10.66 k
R10
R16
R20
3340–(3316ACT)
600
17500
R26
3.0 k
R27
9.0 k
Q8
QNPN
R2
1.56 k
R9
3.0 k
R13
R5
4.5 k
11660
SUB
Q14
QNPN
Q11 2
Q1
C1
30 P
C2
3.0 P
N+
QNPN 6
Q4
QNPN
Q13
QNPN
Q3
QNPN
Q2
Q16
QNPN 4
R6
1.0 k
Diode
R7
14 k
R3
1.8 k
R8
5.0 k
This device contains 22 active transistors.
2
MOTOROLA ANALOG IC DEVICE DATA
MC7800, MC7800A, LM340, LM340A Series
ELECTRICAL CHARACTERISTICS (V = 10 V, I = 500 mA, T = T
in
to T [Note 1], unless otherwise noted.)
high
O
J
low
MC7805C/LM340T–5
Characteristic
Symbol
Min
Typ
Max
Unit
Vdc
Vdc
Output Voltage (T = 25°C)
V
V
4.8
5.0
5.2
J
O
Output Voltage (5.0 mA ≤ I ≤ 1.0 A, P ≤ 15 W)
O
D
O
7.0 Vdc ≤ V ≤ 20 Vdc
in
4.75
–
5.0
–
5.25
–
8.0 Vdc ≤ V ≤ 20 Vdc
in
Line Regulation (Note 2)
7.5 Vdc ≤ V ≤ 20 Vdc, 1.0 A
in
Reg
mV
mV
line
–
–
0.5
0.8
20
10
8.0 Vdc ≤ V ≤ 12 Vdc
in
Load Regulation (Note 2)
Reg
load
5.0 mA ≤ I ≤ 1.0 A
–
-
1.3
1.3
25
25
O
5.0 mA ≤ I ≤ 1.5 A (T = 25°C)
O
A
Quiescent Current
I
–
3.2
6.5
mA
mA
B
Quiescent Current Change
7.0 Vdc ≤ V ≤ 25 Vdc
∆I
B
–
–
0.3
0.08
1.0
0.8
in
5.0 mA ≤ I ≤ 1.0 A (T = 25°C)
O
A
Ripple Rejection
RR
62
83
–
dB
8.0 Vdc ≤ V ≤ 18 Vdc, f = 120 Hz
in
Dropout Voltage (I = 1.0 A, T = 25°C)
V – V
O
–
–
2.0
10
–
–
Vdc
O
J
I
Output Noise Voltage (T = 25°C)
V
n
µV/V
O
A
10 Hz ≤ f ≤ 100 kHz
Output Resistance f = 1.0 kHz
r
–
–
0.9
0.6
–
–
mΩ
O
Short Circuit Current Limit (T = 25°C)
I
A
A
SC
V
in
= 35 Vdc
Peak Output Current (T = 25°C)
I
–
–
2.2
–
–
A
J
max
Average Temperature Coefficient of Output Voltage
TCV
–0.3
mV/°C
O
ELECTRICAL CHARACTERISTICS (V = 10 V, I = 1.0 A, T = T to T
in low
[Note 1], unless otherwise noted.)
MC7805AC/LM340AT–5
O
J
high
Characteristic
Symbol
Min
Typ
5.0
5.0
Max
Unit
Vdc
Vdc
Output Voltage (T = 25°C)
V
4.9
4.8
5.1
5.2
J
O
O
Output Voltage (5.0 mA ≤ I ≤ 1.0 A, P ≤ 15 W)
V
O
D
7.5 Vdc ≤ V ≤ 20 Vdc
in
Line Regulation (Note 2)
Reg
mV
line
7.5 Vdc ≤ V ≤ 25 Vdc, I = 500 mA
in
–
–
–
–
0.5
0.8
1.3
4.5
10
12
4.0
10
O
8.0 Vdc ≤ V ≤ 12 Vdc, I = 1.0 A
in
O
8.0 Vdc ≤ V ≤ 12 Vdc, I = 1.0 A, T = 25°C
in
O
J
J
7.3 Vdc ≤ V ≤ 20 Vdc, I = 1.0 A, T = 25°C
in
O
Load Regulation (Note 2)
Reg
load
mV
5.0 mA ≤ I ≤ 1.5 A, T = 25°C
–
–
–
1.3
0.8
0.53
25
25
15
O
J
5.0 mA ≤ I ≤ 1.0 A
O
250 mA ≤ I ≤ 750 mA
O
Quiescent Current
I
–
3.2
6.0
mA
mA
B
Quiescent Current Change
∆I
B
8.0 Vdc ≤ V ≤ 25 Vdc, I = 500 mA
in
–
–
–
0.3
–
0.08
0.8
0.8
0.5
O
7.5 Vdc ≤ V ≤ 20 Vdc, T = 25°C
in
J
5.0 mA ≤ I ≤ 1.0 A
O
Ripple Rejection
RR
68
83
–
dB
8.0 Vdc ≤ V ≤ 18 Vdc, f = 120 Hz, I = 500 mA
in
O
Dropout Voltage (I = 1.0 A, T = 25°C)
V – V
I O
–
2.0
–
Vdc
O
J
NOTES: 1. T
low
= –40°C for MC78XXAC, C, LM340AT–XX, LM340T–XX
T
= +125°C for MC78XXAC, C, LM340AT–XX, LM340T–XX
high
2. Load and line regulation are specified at constant junction temperature. Changes in V due to heating effects must be taken into account
O
separately. Pulse testing with low duty cycle is used.
3
MOTOROLA ANALOG IC DEVICE DATA
MC7800, MC7800A, LM340, LM340A Series
ELECTRICAL CHARACTERISTICS (continued) (V = 10 V, I = 1.0 A, T = T
in O
to T
[Note 1], unless otherwise noted.)
J
low
high
MC7805AC/LM340AT–5
Characteristic
Output Noise Voltage (T = 25°C)
Symbol
Min
Typ
Max
Unit
µV/V
V
n
–
10
–
A
O
10 Hz ≤ f ≤ 100 kHz
Output Resistance (f = 1.0 kHz)
Short Circuit Current Limit (T = 25°C)
r
–
–
0.9
0.2
–
–
mΩ
O
I
A
A
SC
V
in
= 35 Vdc
Peak Output Current (T = 25°C)
I
–
–
2.2
–
–
A
J
max
Average Temperature Coefficient of Output Voltage
TCV
–0.3
mV/°C
O
NOTES: 1. T
low
= –40°C for MC78XXAC, C, LM340AT–XX, LM340T–XX
T = +125°C for MC78XXAC, C, LM340AT–XX, LM340T–XX
high
2. Load and line regulation are specified at constant junction temperature. Changes in V due to heating effects must be taken into account
O
separately. Pulse testing with low duty cycle is used.
ELECTRICAL CHARACTERISTICS (V = 11 V, I = 500 mA, T = T
in
to T [Note 1], unless otherwise noted.)
high
O
J
low
MC7806C
Characteristic
Symbol
Min
Typ
Max
Unit
Vdc
Vdc
Output Voltage (T = 25°C)
V
5.75
6.0
6.25
J
O
O
Output Voltage (5.0 mA ≤ I ≤ 1.0 A, P ≤ 15 W)
V
O
D
8.0 Vdc ≤ V ≤ 21 Vdc
9.0 Vdc ≤ V ≤ 21 Vdc
in
5.7
–
6.0
–
6.3
–
in
Line Regulation, T = 25°C (Note 2)
Reg
mV
mV
J
line
8.0 Vdc ≤ V ≤ 25 Vdc
–
–
0.5
0.8
24
12
in
9.0 Vdc ≤ V ≤ 13 Vdc
in
Load Regulation, T = 25°C (Note 2)
Reg
–
1.3
30
J
load
5.0 mA ≤ I ≤ 1.5 A
O
Quiescent Current (T = 25°C)
I
–
3.3
8.0
mA
mA
J
B
Quiescent Current Change
∆I
B
8.0 Vdc ≤ V ≤ 25 Vdc
in
–
–
0.3
0.08
1.3
0.5
5.0 mA ≤ I ≤ 1.0 A
O
Ripple Rejection
RR
58
65
–
dB
9.0 Vdc ≤ V ≤ 19 Vdc, f = 120 Hz
in
Dropout Voltage (I = 1.0 A, T = 25°C)
V – V
O
–
–
2.0
10
–
–
Vdc
O
J
I
Output Noise Voltage (T = 25°C)
V
n
µV/V
O
A
10 Hz ≤ f ≤ 100 kHz
Output Resistance f = 1.0 kHz
r
–
–
0.9
0.2
–
–
mΩ
O
Short Circuit Current Limit (T = 25°C)
I
A
A
SC
V
in
= 35 Vdc
Peak Output Current (T = 25°C)
I
–
–
2.2
–
–
A
J
max
Average Temperature Coefficient of Output Voltage
TCV
–0.3
mV/°C
O
NOTES: 1. T
low
= –40°C for MC78XXAC, C
T
= +125°C for MC78XXAC, C
high
2. Load and line regulation are specified at constant junction temperature. Changes in V due to heating effects must be taken into account
O
separately. Pulse testing with low duty cycle is used.
4
MOTOROLA ANALOG IC DEVICE DATA
MC7800, MC7800A, LM340, LM340A Series
ELECTRICAL CHARACTERISTICS (V = 11 V, I = 1.0 A, T = T
in
to T [Note 1], unless otherwise noted.)
high
O
J
low
MC7806AC
Characteristic
Symbol
Min
5.88
5.76
Typ
6.0
6.0
Max
6.12
6.24
Unit
Vdc
Vdc
Output Voltage (T = 25°C)
V
V
J
O
Output Voltage (5.0 mA ≤ I ≤ 1.0 A, P ≤ 15 W)
O
D
O
8.6 Vdc ≤ V ≤ 21 Vdc
in
Line Regulation (Note 2)
8.6 Vdc ≤ V ≤ 25 Vdc, I = 500 mA
in
Reg
mV
mV
line
–
–
5.0
1.4
12
15
O
O
9.0 Vdc ≤ V ≤ 13 Vdc, I = 1.0 A
in
Load Regulation (Note 2)
Reg
load
5.0 mA ≤ I ≤ 1.5 A, T = 25°C
–
–
–
1.3
0.9
0.2
25
25
15
O
J
5.0 mA ≤ I ≤ 1.0 A
O
250 mA ≤ I ≤ 750 mA
O
Quiescent Current
I
–
3.3
6.0
mA
mA
B
Quiescent Current Change
∆I
B
9.0 Vdc ≤ V ≤ 25 Vdc, I = 500 mA
in
–
–
–
–
–
–
0.8
0.8
0.5
O
9.0 Vdc ≤ V ≤ 21 Vdc, I = 1.0 A, T = 25°C
in
O
J
5.0 mA ≤ I ≤ 1.0 A
O
Ripple Rejection
RR
58
65
–
dB
9.0 Vdc ≤ V ≤ 19 Vdc, f = 120 Hz, I = 500 mA
in
O
Dropout Voltage (I = 1.0 A, T = 25°C)
V – V
O
–
–
2.0
10
–
–
Vdc
O
J
I
Output Noise Voltage (T = 25°C)
V
n
µV/V
O
A
10 Hz ≤ f ≤ 100 kHz
Output Resistance (f = 1.0 kHz)
r
–
–
0.9
0.2
–
–
mΩ
O
Short Circuit Current Limit (T = 25°C)
I
A
A
SC
V
in
= 35 Vdc
Peak Output Current (T = 25°C)
I
–
–
2.2
–
–
A
J
max
Average Temperature Coefficient of Output Voltage
TCV
–0.3
mV/°C
O
ELECTRICAL CHARACTERISTICS (V = 14 V, I = 500 mA, T = T
in
to T [Note 1], unless otherwise noted.)
high
O
J
low
MC7808C
Characteristic
Symbol
Min
7.7
7.6
Typ
8.0
8.0
Max
8.3
Unit
Vdc
Vdc
Output Voltage (T = 25°C)
V
J
O
O
Output Voltage (5.0 mA ≤ I ≤ 1.0 A, P ≤ 15 W)
V
8.4
O
D
10.5 Vdc ≤ V ≤ 23 Vdc
in
Line Regulation, T = 25°C, (Note 2)
Reg
mV
mV
J
line
10.5 Vdc ≤ V ≤ 25 Vdc
–
–
6.0
1.7
32
16
in
11 Vdc ≤ V ≤ 17 Vdc
in
Load Regulation, T = 25°C (Note 2)
Reg
–
1.4
35
J
load
5.0 mA ≤ I ≤ 1.5 A
O
Quiescent Current
I
–
3.3
8.0
mA
mA
B
Quiescent Current Change
∆I
B
10.5 Vdc ≤ V ≤ 25 Vdc
in
–
–
–
–
1.0
0.5
5.0 mA ≤ I ≤ 1.0 A
O
Ripple Rejection
RR
56
62
–
dB
11.5 Vdc ≤ V ≤ 18 Vdc, f = 120 Hz
in
Dropout Voltage (I = 1.0 A, T = 25°C)
V – V
O
–
–
2.0
10
–
–
Vdc
O
J
I
Output Noise Voltage (T = 25°C)
V
n
µV/V
O
A
10 Hz ≤ f ≤ 100 kHz
NOTES: 1. T
low
= –40°C for MC78XXAC, C
T
= +125°C for MC78XXAC, C
high
2. Load and line regulation are specified at constant junction temperature. Changes in V due to heating effects must be taken into account
O
separately. Pulse testing with low duty cycle is used.
5
MOTOROLA ANALOG IC DEVICE DATA
MC7800, MC7800A, LM340, LM340A Series
ELECTRICAL CHARACTERISTICS (continued) (V = 14 V, I = 500 mA, T = T
to T
[Note 1], unless otherwise noted.)
in
O
J
low
high
MC7808C
Characteristic
Output Resistance f = 1.0 kHz
Short Circuit Current Limit (T = 25°C)
Symbol
Min
–
Typ
0.9
0.2
Max
–
Unit
mΩ
A
r
O
I
–
–
A
SC
V
in
= 35 Vdc
Peak Output Current (T = 25°C)
I
–
–
2.2
–
–
A
J
max
Average Temperature Coefficient of Output Voltage
TCV
–0.4
mV/°C
O
ELECTRICAL CHARACTERISTICS (V = 14 V, I = 1.0 A, T = T to T
in low
[Note 1], unless otherwise noted.)
O
J
high
MC7808AC
Characteristic
Symbol
Min
7.84
7.7
Typ
8.0
8.0
Max
8.16
8.3
Unit
Vdc
Vdc
Output Voltage (T = 25°C)
V
J
O
O
Output Voltage (5.0 mA ≤ I ≤ 1.0 A, P ≤ 15 W)
V
O
D
10.6 Vdc ≤ V ≤ 23 Vdc
in
Line Regulation (Note 2)
Reg
mV
line
10.6 Vdc ≤ V ≤ 25 Vdc, I = 500 mA
in
–
–
–
6.0
1.7
5.0
15
18
15
O
11 Vdc ≤ V ≤ 17 Vdc, I = 1.0 A
in
O
10.4 Vdc ≤ V ≤ 23 Vdc, T = 25°C
in
J
Load Regulation (Note 2)
Reg
load
mV
5.0 mA ≤ I ≤ 1.5 A, T = 25°C
–
–
–
1.4
1.0
0.22
25
25
15
O
J
5.0 mA ≤ I ≤ 1.0 A
O
250 mA ≤ I ≤ 750 mA
O
Quiescent Current
I
–
3.3
6.0
mA
mA
B
Quiescent Current Change
∆I
B
11 Vdc ≤ V ≤ 25 Vdc, I = 500 mA
in
–
–
–
–
–
–
0.8
0.8
0.5
O
10.6 Vdc ≤ V ≤ 23 Vdc, I = 1.0 A, T = 25°C
in
O
J
5.0 mA ≤ I ≤ 1.0 A
O
Ripple Rejection
RR
56
62
–
dB
11.5 Vdc ≤ V ≤ 21.5 Vdc, f = 120 Hz, I = 500 mA
in
O
Dropout Voltage (I = 1.0 A, T = 25°C)
V – V
O
–
–
2.0
10
–
–
Vdc
O
J
I
Output Noise Voltage (T = 25°C)
V
n
µV/V
O
A
10 Hz ≤ f ≤ 100 kHz
Output Resistance f = 1.0 kHz
r
–
–
0.9
0.2
–
–
mΩ
O
Short Circuit Current Limit (T = 25°C)
I
A
A
SC
V
= 35 Vdc
in
Peak Output Current (T = 25°C)
I
–
–
2.2
–
–
A
J
max
Average Temperature Coefficient of Output Voltage
TCV
–0.4
mV/°C
O
NOTES: 1. T
low
= –40°C for MC78XXAC, C
T
= +125°C for MC78XXAC, C
high
2. Load and line regulation are specified at constant junction temperature. Changes in V due to heating effects must be taken into account
O
separately. Pulse testing with low duty cycle is used.
6
MOTOROLA ANALOG IC DEVICE DATA
MC7800, MC7800A, LM340, LM340A Series
ELECTRICAL CHARACTERISTICS (V = 15 V, I = 500 mA, T = T
in
to T [Note 1], unless otherwise noted.)
high
O
J
low
MC7809CT
Characteristic
Symbol
Min
8.65
8.55
Typ
9.0
9.0
Max
9.35
9.45
Unit
Vdc
Vdc
Output Voltage (T = 25°C)
V
V
J
O
Output Voltage (5.0 mA ≤ I ≤ 1.0 A, P ≤ 15 W)
O
D
O
11.5 Vdc ≤ V ≤ 24 Vdc
in
Line Regulation, T = 25°C (Note 2)
Reg
mV
mV
J
line
11 Vdc ≤ V ≤ 26 Vdc
–
–
6.2
1.8
32
16
in
11.5 Vdc ≤ V ≤ 17 Vdc
in
Load Regulation, T = 25°C (Note 2)
Reg
–
1.5
35
J
load
5.0 mA ≤ I ≤ 1.5 A
O
Quiescent Current
I
–
3.4
8.0
mA
mA
B
Quiescent Current Change
∆I
B
11.5 Vdc ≤ V ≤ 26 Vdc
in
–
–
–
–
1.0
0.5
5.0 mA ≤ I ≤ 1.0 A
O
Ripple Rejection
RR
56
61
–
dB
11.5 Vdc ≤ V ≤ 21.5 Vdc, f = 120 Hz
in
Dropout Voltage (I = 1.0 A, T = 25°C)
V – V
O
–
–
2.0
10
–
–
Vdc
O
J
I
Output Noise Voltage (T = 25°C)
V
n
µV/V
O
A
10 Hz ≤ f ≤ 100 kHz
Output Resistance f = 1.0 kHz
r
–
–
1.0
0.2
–
–
mΩ
O
Short Circuit Current Limit (T = 25°C)
I
A
A
SC
V
in
= 35 Vdc
Peak Output Current (T = 25°C)
I
–
–
2.2
–
–
A
J
max
Average Temperature Coefficient of Output Voltage
TCV
–0.5
mV/°C
O
ELECTRICAL CHARACTERISTICS (V = 19 V, I = 500 mA, T = T
to T
[Note 1], unless otherwise noted.)
high
in
O
J
low
MC7812C/LM340T–12
Characteristic
Symbol
Min
Typ
12
Max
Unit
Vdc
Vdc
Output Voltage (T = 25°C)
V
V
11.5
11.4
12.5
12.6
J
O
Output Voltage (5.0 mA ≤ I ≤ 1.0 A, P ≤ 15 W)
12
O
D
O
14.5 Vdc ≤ V ≤ 27 Vdc
in
Line Regulation, T = 25°C (Note 2)
Reg
mV
J
line
14.5 Vdc ≤ V ≤ 30 Vdc
16 Vdc ≤ V ≤ 22 Vdc
in
–
–
–
3.8
0.3
–
24
24
48
in
14.8 Vdc ≤ V ≤ 27 Vdc, I = 1.0 A
in
O
Load Regulation, T = 25°C (Note 2)
Reg
–
8.1
60
mV
J
load
5.0 mA ≤ I ≤ 1.5 A
O
Quiescent Current
I
–
3.4
6.5
mA
mA
B
Quiescent Current Change
∆I
B
14.5 Vdc ≤ V ≤ 30 Vdc, I = 1.0 A, T = 25°C
15 Vdc ≤ V ≤ 30 Vdc
in
–
–
–
–
–
–
0.7
0.8
0.5
in
O
J
5.0 mA ≤ I ≤ 1.0 A
O
Ripple Rejection
RR
55
60
–
dB
15 Vdc ≤ V ≤ 25 Vdc, f = 120 Hz
in
Dropout Voltage (I = 1.0 A, T = 25°C)
V – V
I O
–
2.0
–
Vdc
O
J
NOTES: 1. T
low
= –40°C for MC78XXAC, C, LM340AT–XX, LM340T–XX
T
= +125°C for MC78XXAC, C, LM340AT–XX, LM340T–XX
high
2. Load and line regulation are specified at constant junction temperature. Changes in V due to heating effects must be taken into account
O
separately. Pulse testing with low duty cycle is used.
7
MOTOROLA ANALOG IC DEVICE DATA
MC7800, MC7800A, LM340, LM340A Series
ELECTRICAL CHARACTERISTICS (continued) (V = 19 V, I = 500 mA, T = T
to T
[Note 1], unless otherwise noted.)
in
O
J
low
high
MC7812C/LM340T–12
Characteristic
Output Noise Voltage (T = 25°C)
Symbol
Min
Typ
Max
Unit
µV/V
V
n
–
10
–
A
O
10 Hz ≤ f ≤ 100 kHz
Output Resistance f = 1.0 kHz
Short Circuit Current Limit (T = 25°C)
r
–
–
1.1
0.2
–
–
mΩ
O
I
A
A
SC
V
in
= 35 Vdc
Peak Output Current (T = 25°C)
I
–
–
2.2
–
–
A
J
max
Average Temperature Coefficient of Output Voltage
TCV
–0.8
mV/°C
O
ELECTRICAL CHARACTERISTICS (V = 19 V, I = 1.0 A, T = T
in J
to T
low
[Note 1], unless otherwise noted.)
MC7812AC/LM340AT–12
O
high
Characteristic
Symbol
Min
Typ
12
Max
Unit
Vdc
Vdc
Output Voltage (T = 25°C)
V
V
11.75
11.5
12.25
12.5
J
O
Output Voltage (5.0 mA ≤ I ≤ 1.0 A, P ≤ 15 W)
12
O
D
O
14.8 Vdc ≤ V ≤ 27 Vdc
in
Line Regulation (Note 2)
Reg
mV
line
14.8 Vdc ≤ V ≤ 30 Vdc, I = 500 mA
in
–
–
–
3.8
2.2
6.0
18
20
120
O
16 Vdc ≤ V ≤ 22 Vdc, I = 1.0 A
in
O
14.5 Vdc ≤ V ≤ 27 Vdc, T = 25°C
in
J
Load Regulation (Note 2)
Reg
load
mV
5.0 mA ≤ I ≤ 1.5 A, T = 25°C
–
–
–
–
25
25
O
J
5.0 mA ≤ I ≤ 1.0 A
O
Quiescent Current
I
–
3.4
6.0
mA
mA
B
Quiescent Current Change
∆I
B
15 Vdc ≤ V ≤ 30 Vdc, I = 500 mA
–
–
–
–
–
–
0.8
0.8
0.5
in
O
14.8 Vdc ≤ V ≤ 27 Vdc, T = 25°C
in
J
5.0 mA ≤ I ≤ 1.0 A, T = 25°C
O
J
Ripple Rejection
RR
55
60
–
dB
15 Vdc ≤ V ≤ 25 Vdc, f = 120 Hz, I = 500 mA
in
O
Dropout Voltage (I = 1.0 A, T = 25°C)
V – V
O
–
–
2.0
10
–
–
Vdc
O
J
I
Output Noise Voltage (T = 25°C)
V
n
µV/V
O
A
10 Hz ≤ f ≤ 100 kHz
Output Resistance (f = 1.0 kHz)
r
–
–
1.1
0.2
–
–
mΩ
O
Short Circuit Current Limit (T = 25°C)
I
A
A
SC
V
in
= 35 Vdc
Peak Output Current (T = 25°C)
I
–
–
2.2
–
–
A
J
max
Average Temperature Coefficient of Output Voltage
TCV
–0.8
mV/°C
O
NOTES: 1. T
low
= –40°C for MC78XXAC, C, LM340AT–XX, LM340T–XX
T
= +125°C for MC78XXAC, C, LM340AT–XX, LM340T–XX
high
2. Load and line regulation are specified at constant junction temperature. Changes in V due to heating effects must be taken into account
O
separately. Pulse testing with low duty cycle is used.
8
MOTOROLA ANALOG IC DEVICE DATA
MC7800, MC7800A, LM340, LM340A Series
ELECTRICAL CHARACTERISTICS (V = 23 V, I = 500 mA, T = T
in
to T [Note 1], unless otherwise noted.)
high
O
J
low
MC7815C/LM340T–15
Characteristic
Symbol
Min
14.4
Typ
15
Max
15.6
Unit
Vdc
Vdc
Output Voltage (T = 25°C)
V
V
J
O
Output Voltage (5.0 mA ≤ I ≤ 1.0 A, P ≤ 15 W)
14.25
15
15.75
O
D
O
17.5 Vdc ≤ V ≤ 30 Vdc
in
Line Regulation, T = 25°C (Note 2)
Reg
mV
mV
J
line
17.9 Vdc ≤ V ≤ 30 Vdc
–
–
8.5
3.0
30
28
in
20 Vdc ≤ V ≤ 26 Vdc
in
Load Regulation, T = 25°C (Note 2)
Reg
–
1.8
55
J
load
5.0 mA ≤ I ≤ 1.5 A
O
Quiescent Current
I
–
3.5
6.5
mA
mA
B
Quiescent Current Change
∆I
B
17.5 Vdc ≤ V ≤ 30 Vdc
17.5 Vdc ≤ V ≤ 30 Vdc, I = 1.0 A, T = 25°C
in
–
–
–
–
–
–
0.8
0.7
0.5
in
O
J
5.0 mA ≤ I ≤ 1.0 A
O
Ripple Rejection
RR
54
58
–
dB
18.5 Vdc ≤ V ≤ 28.5 Vdc, f = 120 Hz
in
Dropout Voltage (I = 1.0 A, T = 25°C)
V – V
O
–
–
2.0
10
–
–
Vdc
O
J
I
Output Noise Voltage (T = 25°C)
V
n
µV/V
O
A
10 Hz ≤ f ≤ 100 kHz
Output Resistance f = 1.0 kHz
r
–
–
1.2
0.2
–
–
mΩ
O
Short Circuit Current Limit (T = 25°C)
I
A
A
SC
V
= 35 Vdc
in
Peak Output Current (T = 25°C)
I
–
–
2.2
–
–
A
J
max
Average Temperature Coefficient of Output Voltage
TCV
–1.0
mV/°C
O
ELECTRICAL CHARACTERISTICS (V = 23 V, I = 1.0 A, T = T
in J
to T
low
[Note 1], unless otherwise noted.)
MC7815AC/LM340AT–15
O
high
Characteristic
Symbol
Min
Typ
15
Max
Unit
Vdc
Vdc
Output Voltage (T = 25°C)
V
14.7
14.4
15.3
15.6
J
O
O
Output Voltage (5.0 mA ≤ I ≤ 1.0 A, P ≤ 15 W)
V
15
O
D
17.9 Vdc ≤ V ≤ 30 Vdc
in
Line Regulation (Note 2)
Reg
mV
line
17.9 Vdc ≤ V ≤ 30 Vdc, I = 500 mA
20 Vdc ≤ V ≤ 26 Vdc
in
–
–
–
8.5
3.0
7.0
20
22
20
in
O
17.5 Vdc ≤ V ≤ 30 Vdc, I = 1.0 A, T = 25°C
in
O
J
Load Regulation (Note 2)
Reg
load
mV
5.0 mA ≤ I ≤ 1.5 A, T = 25°C
–
–
–
1.8
1.5
1.2
25
25
15
O
J
5.0 mA ≤ I ≤ 1.0 A
O
250 mA ≤ I ≤ 750 mA
O
Quiescent Current
I
–
3.5
6.0
mA
mA
B
Quiescent Current Change
∆I
B
17.5 Vdc ≤ V ≤ 30 Vdc, I = 500 mA
–
–
–
–
–
–
0.8
0.8
0.5
in
O
17.5 Vdc ≤ V ≤ 30 Vdc, I = 1.0 A, T = 25°C
in
O
J
5.0 mA ≤ I ≤ 1.0 A
O
NOTES: 1. T
low
= –40°C for MC78XXAC, C, LM340AT–XX, LM340T–XX
T
= +125°C for MC78XXAC, C, LM340AT–XX, LM340T–XX
high
2. Load and line regulation are specified at constant junction temperature. Changes in V due to heating effects must be taken into account
O
separately. Pulse testing with low duty cycle is used.
9
MOTOROLA ANALOG IC DEVICE DATA
MC7800, MC7800A, LM340, LM340A Series
ELECTRICAL CHARACTERISTICS (continued) (V = 23 V, I = 1.0 A, T = T
in
to T
[Note 1], unless otherwise noted.)
O
J
low
high
MC7815AC/LM340AT–15
Characteristic
Symbol
Min
Typ
Max
Unit
Ripple Rejection
18.5 Vdc ≤ V ≤ 28.5 Vdc, f = 120 Hz, I = 500 mA
RR
60
80
–
dB
in
Dropout Voltage (I = 1.0 A, T = 25°C)
O
V – V
O
–
–
2.0
10
–
–
Vdc
O
J
I
Output Noise Voltage (T = 25°C)
V
n
µV/V
O
A
10 Hz ≤ f ≤ 100 kHz
Output Resistance f = 1.0 kHz
r
–
–
1.2
0.2
–
–
mΩ
O
Short Circuit Current Limit (T = 25°C)
I
A
A
SC
V
= 35 Vdc
in
Peak Output Current (T = 25°C)
I
–
–
2.2
–
–
A
J
max
Average Temperature Coefficient of Output Voltage
TCV
–1.0
mV/°C
O
ELECTRICAL CHARACTERISTICS (V = 27 V, I = 500 mA, T = T
in
to T [Note 1], unless otherwise noted.)
high
O
J
low
MC7818C
Characteristic
Symbol
Min
17.3
17.1
Typ
18
Max
18.7
18.9
Unit
Vdc
Vdc
Output Voltage (T = 25°C)
V
J
O
O
Output Voltage (5.0 mA ≤ I ≤ 1.0 A, P ≤ 15 W)
V
18
O
D
21 Vdc ≤ V ≤ 33 Vdc
in
Line Regulation, (Note 2)
21 Vdc ≤ V ≤ 33 Vdc
in
Reg
mV
mV
line
–
–
9.5
3.2
50
25
24 Vdc ≤ V ≤ 30 Vdc
in
Load Regulation, (Note 2)
Reg
–
2.0
55
load
5.0 mA ≤ I ≤ 1.5 A
O
Quiescent Current
I
–
3.5
6.5
mA
mA
B
Quiescent Current Change
21 Vdc ≤ V ≤ 33 Vdc
∆I
B
–
–
–
–
1.0
0.5
in
5.0 mA ≤ I ≤ 1.0 A
O
Ripple Rejection
RR
53
57
–
dB
22 Vdc ≤ V ≤ 33 Vdc, f = 120 Hz
in
Dropout Voltage (I = 1.0 A, T = 25°C)
V – V
iI O
–
–
2.0
10
–
–
Vdc
O
J
Output Noise Voltage (T = 25°C)
V
n
µV/V
O
A
10 Hz ≤ f ≤ 100 kHz
Output Resistance f = 1.0 kHz
r
–
–
1.3
0.2
–
–
mΩ
O
Short Circuit Current Limit (T = 25°C)
I
A
A
SC
V
in
= 35 Vdc
Peak Output Current (T = 25°C)
I
–
–
2.2
–
–
A
J
max
Average Temperature Coefficient of Output Voltage
TCV
–1.5
mV/°C
O
NOTES: 1. T
low
= –40°C for MC78XXAC, C
T
= +125°C for MC78XXAC, C
high
2. Load and line regulation are specified at constant junction temperature. Changes in V due to heating effects must be taken into account
O
separately. Pulse testing with low duty cycle is used.
10
MOTOROLA ANALOG IC DEVICE DATA
MC7800, MC7800A, LM340, LM340A Series
ELECTRICAL CHARACTERISTICS (V = 27 V, I = 1.0 A, T = T
in
to T [Note 1], unless otherwise noted.)
high
O
J
low
MC7818AC
Characteristic
Symbol
Min
17.64
17.3
Typ
18
Max
18.36
18.7
Unit
Vdc
Vdc
Output Voltage (T = 25°C)
V
V
J
O
Output Voltage (5.0 mA ≤ I ≤ 1.0 A, P ≤ 15 W)
18
O
D
O
21 Vdc ≤ V ≤ 33 Vdc
in
Line Regulation (Note 2)
Reg
mV
line
21 Vdc ≤ V ≤ 33 Vdc, I = 500 mA
in
–
–
–
–
9.5
3.2
3.2
8.0
22
25
10.5
22
O
24 Vdc ≤ V ≤ 30 Vdc, I = 1.0 A
in
O
24 Vdc ≤ V ≤ 30 Vdc, I = 1.0 A, T = 25°C
in
O
J
20.6 Vdc ≤ V ≤ 33 Vdc, I = 1.0 A, T = 25°C
in
O
J
Load Regulation (Note 2)
Reg
load
mV
5.0 mA ≤ I ≤ 1.5 A, T = 25°C
–
–
–
2.0
1.8
1.5
25
25
15
O
J
5.0 mA ≤ I ≤ 1.0 A
O
250 mA ≤ I ≤ 750 mA
O
Quiescent Current
I
–
3.5
6.0
mA
mA
B
Quiescent Current Change
∆I
B
21 Vdc ≤ V ≤ 33 Vdc, I = 500 mA
in
–
–
–
–
–
–
0.8
0.8
0.5
O
21.5 Vdc ≤ V ≤ 30 Vdc, T = 25°C
in
J
5.0 mA ≤ I ≤ 1.0 A
O
Ripple Rejection
RR
53
57
–
dB
22 Vdc ≤ V ≤ 32 Vdc, f = 120 Hz, I = 500 mA
in
O
Dropout Voltage (I = 1.0 A, T = 25°C)
V – V
O
–
–
2.0
10
–
–
Vdc
O
J
I
Output Noise Voltage (T = 25°C)
V
n
µV/V
O
A
10 Hz ≤ f ≤ 100 kHz
Output Resistance f = 1.0 kHz
r
–
–
1.3
0.2
–
–
mΩ
O
Short Circuit Current Limit (T = 25°C)
I
A
A
SC
V
in
= 35 Vdc
Peak Output Current (T = 25°C)
I
–
–
2.2
–
–
A
J
max
Average Temperature Coefficient of Output Voltage
TCV
–1.5
mV/°C
O
ELECTRICAL CHARACTERISTICS (V = 33 V, I = 500 mA, T = T
in
to T [Note 1], unless otherwise noted.)
high
O
J
low
MC7824C
Characteristic
Symbol
Min
23
Typ
24
Max
25
Unit
Vdc
Vdc
Output Voltage (T = 25°C)
V
V
J
O
Output Voltage (5.0 mA ≤ I ≤ 1.0 A, P ≤ 15 W)
22.8
24
25.2
O
D
O
27 Vdc ≤ V ≤ 38 Vdc
in
Line Regulation, (Note 2)
Reg
mV
mV
line
27 Vdc ≤ V ≤ 38 Vdc
–
–
2.7
2.7
60
48
in
30 Vdc ≤ V ≤ 36 Vdc
in
Load Regulation, (Note 2)
Reg
–
4.4
65
load
5.0 mA ≤ I ≤ 1.5 A
O
Quiescent Current
I
–
3.6
6.5
mA
mA
B
Quiescent Current Change
∆I
B
27 Vdc ≤ V ≤ 38 Vdc
–
–
–
–
1.0
0.5
in
5.0 mA ≤ I ≤ 1.0 A
O
NOTES: 1. T
low
= –40°C for MC78XXAC, C
T
= +125°C for MC78XXAC, C
high
2. Load and line regulation are specified at constant junction temperature. Changes in V due to heating effects must be taken into account
O
separately. Pulse testing with low duty cycle is used.
11
MOTOROLA ANALOG IC DEVICE DATA
MC7800, MC7800A, LM340, LM340A Series
ELECTRICAL CHARACTERISTICS (continued) (V = 33 V, I = 500 mA, T = T
to T
[Note 1], unless otherwise noted.)
in
O
J
low
high
MC7824C
Characteristic
Symbol
Min
Typ
Max
Unit
Ripple Rejection
28 Vdc ≤ V ≤ 38 Vdc, f = 120 Hz
RR
50
54
–
dB
in
Dropout Voltage (I = 1.0 A, T = 25°C)
V – V
O
–
–
2.0
10
–
–
Vdc
O
J
I
Output Noise Voltage (T = 25°C)
V
n
µV/V
O
A
10 Hz ≤ f ≤ 100 kHz
Output Resistance f = 1.0 kHz
r
–
–
1.4
0.2
–
–
mΩ
O
Short Circuit Current Limit (T = 25°C)
I
A
A
SC
V
in
= 35 Vdc
Peak Output Current (T = 25°C)
I
–
–
2.2
–
–
A
J
max
Average Temperature Coefficient of Output Voltage
TCV
–2.0
mV/°C
O
ELECTRICAL CHARACTERISTICS (V = 33 V, I = 1.0 A, T = T to T
in low
[Note 1], unless otherwise noted.)
O
J
high
MC7824AC
Characteristic
Symbol
Min
23.5
23.2
Typ
24
Max
24.5
25.8
Unit
Vdc
Vdc
Output Voltage (T = 25°C)
V
V
J
O
Output Voltage (5.0 mA ≤ I ≤ 1.0 A, P ≤ 15 W)
24
O
D
O
27.3 Vdc ≤ V ≤ 38 Vdc
in
Line Regulation (Note 2)
Reg
mV
line
27 Vdc ≤ V ≤ 38 Vdc, I = 500 mA
in
–
–
–
–
11.5
3.8
3.8
10
25
28
12
25
O
30 Vdc ≤ V ≤ 36 Vdc, I = 1.0 A
in
O
30 Vdc ≤ V ≤ 36 Vdc, T = 25°C
in
J
26.7 Vdc ≤ V ≤ 38 Vdc, I = 1.0 A, T = 25°C
in
O
J
Load Regulation (Note 2)
Reg
load
mV
5.0 mA ≤ I ≤ 1.5 A, T = 25°C
–
–
–
2.1
2.0
1.8
15
25
15
O
J
5.0 mA ≤ I ≤ 1.0 A
O
250 mA ≤ I ≤ 750 mA
O
Quiescent Current
I
–
3.6
6.0
mA
mA
B
Quiescent Current Change
∆I
B
27.3 Vdc ≤ V ≤ 38 Vdc, I = 500 mA
in
–
–
–
–
–
–
0.8
0.8
0.5
O
27 Vdc ≤ V ≤ 38 Vdc, T = 25°C
in
J
5.0 mA ≤ I ≤ 1.0 A
O
Ripple Rejection
RR
45
54
–
dB
28 Vdc ≤ V ≤ 38 Vdc, f = 120 Hz, I = 500 mA
in
O
Dropout Voltage (I = 1.0 A, T = 25°C)
V – V
O
–
–
2.0
10
–
–
Vdc
O
J
I
Output Noise Voltage (T = 25°C)
V
n
µV/V
O
A
10 Hz ≤ f ≤ 100 kHz
Output Resistance (f = 1.0 kHz)
r
–
–
1.4
0.2
–
–
mΩ
O
Short Circuit Current Limit (T = 25°C)
I
A
A
SC
V
in
= 35 Vdc
Peak Output Current (T = 25°C)
I
–
–
2.2
–
–
A
J
max
Average Temperature Coefficient of Output Voltage
TCV
–2.0
mV/°C
O
NOTES: 1. T
low
= –40°C for MC78XXAC, C
T
= +125°C for MC78XXAC, C
high
2. Load and line regulation are specified at constant junction temperature. Changes in V due to heating effects must be taken into account
O
separately. Pulse testing with low duty cycle is used.
12
MOTOROLA ANALOG IC DEVICE DATA
MC7800, MC7800A, LM340, LM340A Series
Figure 1. Peak Output Current as a Function of
Input/Output Differential Voltage (MC78XXC, AC)
Figure 2. Ripple Rejection as a Function of
Output Voltages (MC78XXC, AC)
3.0
80
70
60
50
40
T
= –40°C
J
2.5
2.0
1.5
1.0
0.5
0
T
= 0°C
J
f = 120 Hz
T
= 25°C
J
PART #
V
in
I
= 20 mA
O
MC7805C = 10 V
MC7806C = 11 V
MC7808C = 14 V
MC7812C = 19 V
MC7815C = 23 V
MC7818C = 27 V
MC7824C = 33 V
∆
V
= 1.0 V(RMS)
in
T
= 85°C
J
T
= 125°C
J
4.0 6.0
8.0
10
12
15
20
25
30
35
40
4.0
6.0
8.0
10
12
14
16
18
20
22
24
V
–V , INPUT/OUPUT VOLTAGE DIFFERENTIAL (V)
V , OUTPUT VOLTAGE (V)
O
in out
Figure 3. Ripple Rejection as a Function of
Frequency (MC78XXC, AC)
Figure 4. Output Voltage as a Function of
Junction Temperature (MC7805C, AC)
80
70
60
50
V
= 20 V
in
= 5.0 mA
5.0
I
O
MC78XXB, C, AC
V
= 8.0 V to 18 V
= 500 mA
in
I
O
4.9
4.8
f = 120 Hz
= 25°C
T
A
40
30
0.01
0.1
1.0
f, FREQUENCY (kHz)
10
–60
–20
20
60
100
140
180
T , JUNCTION TEMPERATURE (
°C)
J
Figure 5. Output Impedance as a Function of
Output Voltage (MC78XXC, AC)
Figure 6. Quiescent Current as a Function of
Temperature (MC78XXC, AC)
10
6.0
4.0
3.0
2.0
1.0
0
= 10 V
= 5.0 V
= 20 mA
in
O
5.0
f = 120 Hz
3.0
2.0
I
C
= 500 mA
= 0 µF
O
L
1.0
0.5
0.3
0.2
0.1
4.0
8.0
12
16
20
24
–75
–50
–25
0
25
50
75
C)
100
125
V
, OUTPUT VOLTAGE (V)
T , JUNCTION TEMPERATURE (
°
O
J
13
MOTOROLA ANALOG IC DEVICE DATA
MC7800, MC7800A, LM340, LM340A Series
APPLICATIONS INFORMATION
Design Considerations
The MC7800 Series of fixed voltage regulators are
designed with Thermal Overload Protection that shuts down
the circuit when subjected to an excessive power overload
condition, Internal Short Circuit Protection that limits the
maximum current the circuit will pass, and Output Transistor
Safe–Area Compensation that reduces the output short
circuit current as the voltage across the pass transistor is
increased.
In many low current applications, compensation
capacitors are not required. However, it is recommended
that the regulator input be bypassed with a capacitor if the
regulator is connected to the power supply filter with long
wire lengths, or if the output load capacitance is large. An
input bypass capacitor should be selected to provide good
high–frequency characteristics to insure stable operation
under all load conditions. A 0.33 µF or larger tantalum,
mylar, or other capacitor having low internal impedance at
high frequencies should be chosen. The bypass capacitor
should be mounted with the shortest possible leads directly
across the regulators input terminals. Normally good
construction techniques should be used to minimize ground
loops and lead resistance drops since the regulator has no
external sense lead.
Figure 7. Current Regulator
Figure 8. Adjustable Output Regulator
MC7805
Input
0.33
Output
MC7805
R
µF
Constant
Current to
Grounded
Load
Input
I
7
O
2
0.33
µF
0.1
µF
6
3
The MC7800 regulators can also be used as a current source when
connected as above. In order to minimize dissipation the MC7805C is
chosen in this application. Resistor R determines the current as follows:
10 k
1.0 k
4
MC1741G
5.0 V
R
I
I
O
B
V
V
= 7.0 V to 20 V
O
= V ≥ 2.0 V
IN
O
I
3.2 mA over line and load changes.
B
The addition of an operational amplifier allows adjustment to higher or
intermediate values while retaining regulation characteristics. The
minimumvoltageobtainablewiththisarrangementis2.0Vgreaterthanthe
regulator voltage.
For example, a 1.0 A current source would require R to be a 5.0
10 W resistor and the output voltage compliance would be the input
voltage less 7.0 V.
Ω,
Figure 9. Current Boost Regulator
Figure 10. Short Circuit Protection
MJ2955
or Equiv.
MJ2955 or Equiv.
R
R
R
SC
Source
Source
Input
Input
0.33 µF
0.33 µF
R
2N6049
or Equiv.
MC78XX
Output
F
R
MC78XX
≥
10
µF
1.0
µF
1.0 µ
Output
≥
10
µF
1.0 µF
XX = 2 digits of type number indicating voltage.
XX = 2 digits of type number indicating voltage.
The circuit of Figure 9 can be modified to provide supply protection against
The MC7800 series can be current boosted with a PNP transistor. The
MJ2955 provides current to 5.0 A. Resistor R in conjunction with the V
of the PNP determines when the pass transistor begins conducting; this
circuitisnotshortcircuitproof.Input/outputdifferentialvoltageminimumis
short circuits by adding a short circuit sense resistor, R , and an
BE
SC
additionalPNP transistor. The current sensing PNP must be able to handle
the short circuit current of the three–terminal regulator. Therefore, a
four–ampere plastic power transistor is specified.
increased by V
of the pass transistor.
BE
14
MOTOROLA ANALOG IC DEVICE DATA
MC7800, MC7800A, LM340, LM340A Series
Figure 11. Worst Case Power Dissipation versus
Ambient Temperature (Case 221A)
Figure 12. Input Output Differential as a Function
of Junction Temperature (MC78XXC, AC)
2.5
20
16
I
= 1.0 A
O
θ
θ
T
= 5
°
C/W
= 65 C/W
= 150
JC
JA
°
I
I
= 500 mA
= 200 mA
O
θ
= 0
°
C/W
HS
°C
2.0
1.5
J(max)
O
12
8.0
4.0
θ
= 5°C/W
I
= 20 mA
HS
O
I
= 0 mA
O
θ
= 15
°C/W
1.0
0.5
HS
∆V
= 2% of V
O O
No Heatsink
25
– – – Extended Curve for MC78XXB
0
0
–50
–25
0
50
75
100
125
150
–75
–50
–25
0
25
50
75
C)
100
125
T , AMBIENT TEMPERATURE (
°C)
T , JUNCTION TEMPERATURE (
°
A
J
2
Figure 13. D PAK Thermal Resistance and Maximum
Power Dissipation versus P.C.B. Copper Length
80
3.5
P
for T = 50°C
A
D(max)
70
60
50
3.0
2.5
2.0
Free Air
Mounted
Vertically
2.0 oz. Copper
L
Minimum
Size Pad
L
1.5
1.0
40
30
R
θ
JA
0
5.0
10
15
20
25
30
L, LENGTH OF COPPER (mm)
DEFINITIONS
Line Regulation – The change in output voltage for a
change in the input voltage. The measurement is made under
conditions of low dissipation or by using pulse techniques such
that the average chip temperature is not significantly affected.
Load Regulation – The change in output voltage for a
change in load current at constant chip temperature.
Maximum Power Dissipation – The maximum total
device dissipation for which the regulator will operate within
specifications.
Quiescent Current – That part of the input current that is
not delivered to the load.
Output Noise Voltage – The rms ac voltage at the output,
with constant load and no input ripple, measured over a
specified frequency range.
Long Term Stability – Output voltage stability under
accelerated life test conditions with the maximum rated
voltage listed in the devices’ electrical characteristics and
maximum power dissipation.
Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding
the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and
specificallydisclaims any and all liability, including without limitation consequential or incidental damages. “Typical” parameters which may be provided in Motorola
datasheetsand/orspecificationscananddovaryindifferentapplicationsandactualperformancemayvaryovertime. Alloperatingparameters,including“Typicals”
must be validated for each customer application by customer’s technical experts. Motorola does not convey any license under its patent rights nor the rights of
others. Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other
applicationsintended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury
ordeathmayoccur. ShouldBuyerpurchaseoruseMotorolaproductsforanysuchunintendedorunauthorizedapplication,BuyershallindemnifyandholdMotorola
and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees
arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that
Motorola was negligent regarding the design or manufacture of the part. Motorola and
Opportunity/Affirmative Action Employer.
are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal
15
MOTOROLA ANALOG IC DEVICE DATA
MC7800, MC7800A, LM340, LM340A Series
OUTLINE DIMENSIONS
T SUFFIX
PLASTIC PACKAGE
CASE 221A–06
ISSUE Y
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. DIM Z DEFINES A ZONE WHERE ALL BODY AND
LEAD IRREGULARITIES ARE ALLOWED.
SEATING
PLANE
–T–
F
B
C
T
S
INCHES
MILLIMETERS
DIM
A
B
C
D
F
G
H
J
K
L
N
Q
R
S
MIN
MAX
0.620
MIN
14.48
9.66
4.07
0.64
3.61
2.42
2.80
0.46
12.70
1.15
4.83
2.54
2.04
1.15
5.97
0.00
1.15
–
MAX
15.75
10.28
4
0.570
0.380
0.160
0.025
0.142
0.095
0.110
0.018
0.500
0.045
0.190
0.100
0.080
0.045
0.235
0.000
0.045
–
A
K
Q
Z
0.405
0.190
0.035
0.147
0.105
0.155
0.025
0.562
0.060
0.210
0.120
0.110
0.055
0.255
0.050
–
4.82
0.88
3.73
2.66
3.93
0.64
14.27
1.52
5.33
3.04
2.79
1.39
6.47
1.27
–
1
2
3
U
H
L
R
V
J
T
U
V
G
D
Z
0.080
2.04
N
D2T SUFFIX
PLASTIC PACKAGE
CASE 936–03
2
(D PAK)
ISSUE B
NOTES:
1
DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2
3
CONTROLLING DIMENSION: INCH.
TAB CONTOUR OPTIONAL WITHIN DIMENSIONS
A AND K.
DIMENSIONS U AND V ESTABLISH A MINIMUM
MOUNTING SURFACE FOR TERMINAL 4.
DIMENSIONS A AND B DO NOT INCLUDE MOLD
FLASH OR GATE PROTRUSIONS. MOLD FLASH
AND GATE PROTRUSIONS NOT TO EXCEED
0.025 (0.635) MAXIMUM.
TERMINAL 4
–T–
A
U
E
4
5
S
K
V
B
H
INCHES
MILLIMETERS
MIN MAX
9.804 10.236
F
DIM
A
B
C
D
E
MIN
MAX
0.403
0.368
0.180
0.036
0.055
1
2
3
0.386
0.356
0.170
0.026
0.045
9.042
4.318
0.660
1.143
9.347
4.572
0.914
1.397
M
L
P
J
F
0.051 REF
0.100 BSC
0.539 0.579 13.691 14.707
0.125 MAX
0.050 REF
1.295 REF
2.540 BSC
G
H
J
K
L
M
N
P
R
S
N
D
R
3.175 MAX
1.270 REF
0.010 (0.254) M
T
0.000
0.088
0.018
0.058
5
0.010
0.102
0.026
0.078
0.000
0.254
2.591
0.660
1.981
G
2.235
0.457
1.473
5
REF
REF
0.116 REF
0.200 MIN
0.250 MIN
2.946 REF
5.080 MIN
6.350 MIN
C
U
V
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