LM340AT-5.0 [ONSEMI]
THREE TERMINAL POSITIVE FIXED VOLTAGE REGULATORS; 三端固定正稳压器
| 型号： | LM340AT-5.0 |
| 厂家： | 
ONSEMI |
| 描述： | THREE TERMINAL POSITIVE FIXED VOLTAGE REGULATORS |
| 文件： | 总20页 (文件大小：209K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Order this document by LM340/D
THREE–TERMINAL
POSITIVE FIXED
VOLTAGE REGULATORS
This family of fixed voltage regulators are monolithic integrated circuits
capable of driving loads in excess of 1.0 A. These three–terminal regulators
employ internal current limiting, thermal shutdown, and safe–area
compensation. Devices are available with improved specifications, including
a 2% output voltage tolerance, on A–suffix 5.0, 12 and 15 V device types.
Although designed primarily as a fixed voltage regulator, these devices
can be used with external components to obtain adjustable voltages and
currents. This series of devices can be used with a series–pass transistor to
boost output current capability at the nominal output voltage.
SEMICONDUCTOR
TECHNICAL DATA
• Output Current in Excess of 1.0 A
• No External Components Required
• Output Voltage Offered in 2% and 4% Tolerance*
• Internal Thermal Overload Protection
• Internal Short Circuit Current Limiting
• Output Transistor Safe–Area Compensation
T SUFFIX
PLASTIC PACKAGE
CASE 221A
Pin 1. Input
1
2. Ground
3. Output
2
3
Heatsink surface is connected to Pin 2.
Simplified Application
LM340–XX
Input
Output
**
ORDERING INFORMATION
C
*
in
C
O
0.33µF
Output Voltage
and Tolerance
Operating
Temperature Range
Device
Package
LM340T–5.0
LM340AT–5.0
LM340T–6.0
LM340T–8.0
LM340T–12
LM340AT–12
LM340T–15
LM340AT–15
LM340T–18
LM340T–24
5.0 V ± 4%
5.0 V ± 2%
6.0 V ± 4%
8.0 V ± 4%
12 V ± 4%
12 V ± 2%
15 V ± 4%
15 V ± 2%
18 V ± 4%
24 V ± 4%
Acommongroundisrequiredbetweentheinputand
the output voltages. The input voltage must remain
typically 1.7 V above the output voltage even during
the low point on the input ripple voltage.
T = 0° to +125°C
J
Plastic Power
XX these two digits of the type number indicate
voltage.
* C is required if regulator is located an
in
appreciable distance from power supply filter.
** C is not needed for stability; however, it does
O
improve transient response. If needed, use a
0.1 µF ceramic disc.
* 2% regulators are available in 5, 12 and 15 V devices.
Motorola, Inc. 1996
Rev 1
LM340, A Series
MAXIMUM RATINGS (T = +25°C unless otherwise noted.)
A
Rating
Symbol
Value
Unit
Input Voltage (5.0 V – 18 V)
Input Voltage (24 V)
V
in
35
40
Vdc
Power Dissipation and Thermal Characteristics
Plastic Package
T
= +25°C
P
1/
θJA
θ
JA
Internally Limited
W
mW/°C
°C/W
A
D
Derate above T = +25°C
Thermal Resistance, Junction–to–Air
15.4
65
A
T = +25°C
Derate above T = +75°C (See Figure 1)
Thermal Resistance, Junction–to–Case
P
Internally Limited
W
mW/°C
°C/W
C
D
1/
θJA
JC
200
5.0
C
θ
Storage Temperature Range
T
–65 to +150
0 to +150
°C
°C
stg
Operating Junction Temperature Range
T
J
Representative Schematic Diagram
Input
1.0k
1.0k
210
6.7V
16k
100
1.0k
3.0k
200
300
3.6k
10pF
5.6k
300
6.4k
13
0.12
200
50
Output
520
40
pF
2.6k
3.9k
6.0k
2.0k
6.0k
2.8k
Gnd
2
MOTOROLA ANALOG IC DEVICE DATA
LM340, A Series
LM340–5.0
ELECTRICAL CHARACTERISTICS (V = 10 V, I = 500 mA, T = T
to T
[Note 1], unless otherwise noted.)
high
in
O
J
low
Characteristics
Symbol
Min
Typ
Max
Unit
Output Voltage (T = +25°C)
V
O
4.8
5.0
5.2
Vdc
J
I
O
= 5.0 mA to 1.0 A
Line Regulation (Note 2)
8.0 Vdc to 20 Vdc
Reg
mV
mV
line
–
–
–
–
–
–
–
–
50
50
25
50
7.0 Vdc to 25 Vdc (T = +25°C)
J
8.0 Vdc to 12 Vdc, I = 1.0 A
O
7.3 Vdc to 20 Vdc, I = 1.0 A (T = +25°C)
O
J
Load Regulation (Note 2)
Reg
load
5.0 mA ≤ I ≤ 1.0 A
–
–
–
–
–
–
50
50
25
O
5.0 mA ≤ I ≤ 1.5 A (T = +25°C)
O
J
250 mA ≤ I ≤ 750 mA (T = +25°C)
O
J
Output Voltage
V
4.75
–
5.25
Vdc
mA
O
7.0 ≤ V ≤ 20 Vdc, 5.0 mA ≤ I ≤ 1.0 A, P ≤ 15 W
in
O
D
Quiescent Current
I
B
I
= 1.0 A
–
–
–
4.0
8.5
8.0
O
J
T = +25°C
Quiescent Current Change
∆I
B
mA
7.0 ≤ V ≤ 25 Vdc, I = 500 mA
–
–
–
–
–
–
1.0
0.5
1.0
in
O
5.0 mA ≤ I ≤ 1.0 A, V = 10 V
O
in
7.5 ≤ V ≤ 20 Vdc, I = 1.0 A
in
O
Ripple Rejection
RR
62
80
–
dB
I
O
= 1.0 A (T = +25°C)
J
Dropout Voltage
V – V
–
–
–
–
1.7
2.0
2.0
40
–
–
–
–
Vdc
mΩ
A
I
O
Output Resistance (f = 1.0 kHz)
r
O
Short Circuit Current Limit (T = +25°C)
I
SC
J
Output Noise Voltage (T = +25°C)
10 Hz ≤ f ≤ 100 kHz
V
n
µV
A
Average Temperature Coefficient of Output Voltage
= 5.0 mA
TCV
–
±0.6
–
mV/°C
O
I
O
Peak Output Current (T = +25°C)
I
O
–
2.4
–
–
–
A
J
Input Voltage to Maintain Line Regulation (T = +25°C)
7.3
Vdc
J
I
O
= 1.0 A
NOTES: 1. T
low
to T = 0° to +125°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 separately.
O
Pulse testing with low duty cycle is used.
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.
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.
Load Regulation – The change in output voltage for a
change in load current at constant chip temperature.
Output Noise Voltage – The rms AC voltage at the output,
with constant load and no input ripple, measured over a
specified frequency range.
3
MOTOROLA ANALOG IC DEVICE DATA
LM340, A Series
LM340A–5.0
ELECTRICAL CHARACTERISTICS (V = 10 V, I = 1.0 A, T = T
to T
[Note 1], unless otherwise noted.)
high
in
O
J
low
Characteristics
Symbol
Min
Typ
Max
Unit
Output Voltage (T = +25°C)
V
O
4.9
5.0
5.1
Vdc
J
I
O
= 5.0 mA to 1.0 A
Line Regulation
7.5 Vdc to 20 Vdc, I = 500 mA
Reg
mV
mV
line
–
–
–
–
–
3.0
–
10
10
12
4.0
O
7.3 Vdc to 25 Vdc (T = +25°C)
J
8.0 Vdc to 12 Vdc
8.0 Vdc to 12 Vdc (T = +25°C)
–
J
Load Regulation
Reg
load
5.0 mA ≤ I ≤ 1.0 A
–
–
–
–
–
–
25
25
15
O
5.0 mA ≤ I ≤ 1.5 A (T = +25°C)
O
J
250 mA ≤ I ≤ 750 mA (T = +25°C)
O
J
Output Voltage
V
4.8
–
5.2
Vdc
mA
mA
O
7.5 ≤ V ≤ 20 Vdc, 5.0 mA ≤ I ≤ 1.0 A, P ≤ 15 W
in
O
D
Quiescent Current
T = +25°C
J
I
B
–
–
–
3.5
6.5
6.0
Quiescent Current Change
∆I
B
5.0 mA ≤ I ≤ 1.0 A, V = 10 V
–
–
–
–
–
–
0.5
0.8
0.8
O
in
8.0 ≤ V ≤ 25 Vdc, I = 500 mA
in
O
O
7.5 ≤ V ≤ 20 Vdc, I = 1.0 A (T = +25°C)
in
J
Ripple Rejection
RR
dB
8.0 ≤ V ≤ 18 Vdc, f = 120 Hz
in
= 500 mA
= 1.0 A (T = +25°C)
I
O
I
O
68
68
–
80
–
–
J
Dropout Voltage
V – V
–
–
–
–
1.7
2.0
2.0
40
–
–
–
–
Vdc
mΩ
A
I
O
Output Resistance (f = 1.0 kHz)
r
O
Short Circuit Current Limit (T = +25°C)
I
SC
J
Output Noise Voltage (T = +25°C)
10 Hz ≤ f ≤ 100 kHz
V
n
µV
A
Average Temperature Coefficient of Output Voltage
TCV
–
±0.6
–
mV/°C
O
I
O
= 5.0 mA
Peak Output Current (T = +25°C)
I
O
–
2.4
–
–
–
A
J
Input Voltage to Maintain Line Regulation (T = +25°C)
7.3
Vdc
J
I
O
= 1.0 A
NOTE: 1. T
to T = 0° to +125°C
high
low
4
MOTOROLA ANALOG IC DEVICE DATA
LM340, A Series
LM340–6.0
ELECTRICAL CHARACTERISTICS (V = 11 V, I = 500 mA, T = T
to T
[Note 1], unless otherwise noted.)
high
in
O
J
low
Characteristics
Symbol
Min
Typ
Max
Unit
Output Voltage (T = +25°C)
V
O
5.75
6.0
6.25
Vdc
J
I
O
= 5.0 mA to 1.0 A
Line Regulation
9.0 Vdc to 21 Vdc
8.0 Vdc to 25 Vdc (T = +25°C)
9.0 Vdc to 13 Vdc, I = 1.0 A
Reg
mV
mV
line
–
–
–
–
–
–
–
–
60
60
30
60
J
O
O
8.3 Vdc to 21 Vdc, I = 1.0 A (T = +25°C)
J
Load Regulation
5.0 mA ≤ I ≤ 1.0 A
Reg
load
–
–
–
–
–
–
60
60
30
O
5.0 mA ≤ I ≤ 1.5 A (T = +25°C)
O
J
250 mA ≤ I ≤ 750 mA (T = +25°C)
O
J
Output Voltage
V
5.7
–
6.3
Vdc
mA
O
8.0 ≤ V ≤ 21 Vdc, 6.0 mA ≤ I ≤ 1.0 A, P ≤ 15 W
in
O
D
Quiescent Current
I
B
I
= 1.0 A
–
–
–
4.0
8.5
8.0
O
J
T = +25°C
Quiescent Current Change
∆I
B
mA
8.0 ≤ V ≤ 25 Vdc, I = 500 mA
–
–
–
–
–
–
1.0
0.5
1.0
in
O
5.0 mA ≤ I ≤ 1.0 A, V = 11 V
O
in
8.6 ≤ V ≤ 21 Vdc, I = 1.0 A
in
O
Ripple Rejection
RR
59
78
–
dB
I
O
= 1.0 A (T = +25°C)
J
Dropout Voltage
V – V
–
–
–
–
1.7
2.0
1.9
45
–
–
–
–
Vdc
mΩ
A
I
O
Output Resistance (f = 1.0 kHz)
r
O
Short Circuit Current Limit (T = +25°C)
I
SC
J
Output Noise Voltage (T = +25°C)
10 Hz ≤ f ≤ 100 kHz
V
n
µV
A
Average Temperature Coefficient of Output Voltage
= 5.0 mA
TCV
–
±0.7
–
mV/°C
O
I
O
Peak Output Current (T = +25°C)
I
O
–
2.4
–
–
–
A
J
Input Voltage to Maintain Line Regulation (T = +25°C)
8.3
Vdc
J
I
O
= 1.0 A
NOTE: 1. T
low
to T = 0° to +125°C
high
5
MOTOROLA ANALOG IC DEVICE DATA
LM340, A Series
LM340–8.0
ELECTRICAL CHARACTERISTICS (V = 14 V, I = 500 mA, T = T
to T
[Note 1], unless otherwise noted.)
high
in
O
J
low
Characteristics
Symbol
Min
Typ
Max
Unit
Output Voltage (T = +25°C)
V
O
7.7
8.0
8.3
Vdc
J
I
O
= 5.0 mA to 1.0 A
Line Regulation
11 Vdc to 23 Vdc
10.5 Vdc to 25 Vdc (T = +25°C)
11 Vdc to 17 Vdc, I = 1.0 A
10.5 Vdc to 23 Vdc, I = 1.0 A (T = +25°C)
Reg
mV
mV
line
–
–
–
–
–
–
–
–
80
80
40
80
J
O
O
J
Load Regulation
5.0 mA ≤ I ≤ 1.0 A
Reg
load
–
–
–
–
–
–
80
80
40
O
5.0 mA ≤ I ≤ 1.5 A (T = +25°C)
O
J
250 mA ≤ I ≤ 750 mA (T = +25°C)
O
J
Output Voltage
V
7.6
–
8.4
Vdc
mA
O
10.5 ≤ V ≤ 23 Vdc, 5.0 mA ≤ I ≤ 1.0 A, P ≤ 15 W
in
O
D
Quiescent Current
I
B
I
= 1.0 A
–
–
–
4.0
8.5
8.0
O
J
T = +25°C
Quiescent Current Change
∆I
B
mA
10.5 ≤ V ≤ 25 Vdc, I = 500 mA
–
–
–
–
–
–
1.0
0.5
1.0
in
O
in
O
5.0 mA ≤ I ≤ 1.0 A, V = 14 V
O
10.6 ≤ V ≤ 23 Vdc, I = 1.0 A
in
Ripple Rejection
RR
56
76
–
dB
I
O
= 1.0 A (T = +25°C)
J
Dropout Voltage
V – V
–
–
–
–
1.7
2.0
1.5
52
–
–
–
–
Vdc
mΩ
A
I
O
Output Resistance (f = 1.0 kHz)
r
O
Short Circuit Current Limit (T = +25°C)
I
SC
J
Output Noise Voltage (T = +25°C)
10 Hz ≤ f ≤ 100 kHz
V
n
µV
A
Average Temperature Coefficient of Output Voltage
= 5.0 mA
TCV
–
±1.0
–
mV/°C
O
I
O
Peak Output Current (T = +25°C)
I
O
–
2.4
–
–
–
A
J
Input Voltage to Maintain Line Regulation (T = +25°C)
10.5
Vdc
J
I
O
= 1.0 A
NOTE: 1. T
to T = 0° to +125°C
high
low
6
MOTOROLA ANALOG IC DEVICE DATA
LM340, A Series
LM340–12
ELECTRICAL CHARACTERISTICS (V = 19 V, I = 500 mA, T = T
to T
[Note 1], unless otherwise noted.)
high
in
O
J
low
Characteristics
Symbol
Min
Typ
Max
Unit
Output Voltage (T = +25°C)
V
O
11.5
12
12.5
Vdc
J
I
O
= 5.0 mA to 1.0 A
Line Regulation (Note 2)
15 Vdc to 27 Vdc
Reg
mV
mV
line
–
–
–
–
–
–
–
–
120
120
60
14.6 Vdc to 30 Vdc (T = +25°C)
J
16 Vdc to 22 Vdc, I = 1.0 A
O
14.6 Vdc to 27 Vdc, I = 1.0 A (T = +25°C)
120
O
J
Load Regulation (Note 2)
Reg
load
5.0 mA ≤ I ≤ 1.0 A
–
–
–
–
–
–
120
120
60
O
5.0 mA ≤ I ≤ 1.5 A (T = +25°C)
O
J
250 mA ≤ I ≤ 750 mA (T = +25°C)
O
J
Output Voltage
V
11.4
–
12.6
Vdc
mA
O
14.5 ≤ V ≤ 27 Vdc, 5.0 mA ≤ I ≤ 1.0 A, P ≤ 15 W
in
O
D
Quiescent Current
I
B
I
= 1.0 A
–
–
–
4.0
8.5
8.0
O
J
T = +25°C
Quiescent Current Change
∆I
B
mA
14.5 ≤ V ≤ 30 Vdc, I = 500 mA
–
–
–
–
–
–
1.0
0.5
1.0
in
O
in
O
5.0 mA ≤ I ≤ 1.0 A, V = 19 V
O
14.8 ≤ V ≤ 27 Vdc, I = 1.0 A
in
Ripple Rejection
RR
55
72
–
dB
I
O
= 1.0 A (T = +25°C)
J
Dropout Voltage
V – V
–
–
–
–
1.7
2.0
1.1
75
–
–
–
–
Vdc
mΩ
A
I
O
Output Resistance (f = 1.0 kHz)
r
O
Short Circuit Current Limit (T = +25°C)
I
SC
J
Output Noise Voltage (T = +25°C)
10 Hz ≤ f ≤ 100 kHz
V
n
µV
A
Average Temperature Coefficient of Output Voltage
= 5.0 mA
TCV
–
±1.5
–
mV/°C
O
I
O
Peak Output Current (T = +25°C)
I
O
–
2.4
–
–
–
A
J
Input Voltage to Maintain Line Regulation (T = +25°C)
14.6
Vdc
J
I
O
= 1.0 A
NOTES: 1. T
low
to T = 0° to +125°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 separately.
O
Pulse testing with low duty cycle is used.
7
MOTOROLA ANALOG IC DEVICE DATA
LM340, A Series
LM340A–12
ELECTRICAL CHARACTERISTICS (V = 19 V, I = 1.0 mA, T = T
to T
[Note 1], unless otherwise noted.)
high
in
O
J
low
Characteristics
Symbol
Min
Typ
Max
Unit
Output Voltage (T = +25°C)
V
O
11.75
12
12.25
Vdc
J
I
O
= 5.0 mA to 1.0 A
Line Regulation
14.8 Vdc to 27 Vdc, I = 500 mA
Reg
mV
mV
line
–
–
–
–
–
4.0
–
18
18
30
9.0
O
14.5 Vdc to 30 Vdc (T = +25°C)
J
16 Vdc to 22 Vdc
16 Vdc to 22 Vdc (T = +25°C)
–
J
Load Regulation
Reg
load
5.0 mA ≤ I ≤ 1.0 A
–
–
–
–
–
–
60
32
19
O
5.0 mA ≤ I ≤ 1.5 A (T = +25°C)
O
J
250 mA ≤ I ≤ 750 mA (T = +25°C)
O
J
Output Voltage
V
11.5
–
12.5
Vdc
mA
mA
O
14.8 ≤ V ≤ 27 Vdc, 5.0 mA ≤ I ≤ 1.0 A, P ≤ 15 W
in
O
D
Quiescent Current
T = +25°C
J
I
B
–
–
–
3.5
6.5
6.0
Quiescent Current Change
∆I
B
5.0 mA ≤ I ≤ 1.0 A, V = 19 V
–
–
–
–
–
–
0.5
0.8
0.8
O
in
15 ≤ V ≤ 30 Vdc, I = 500 mA
in
O
14.8 ≤ V ≤ 27 Vdc, I = 1.0 A(T = +25°C)
in
O
J
Ripple Rejection
RR
dB
15 ≤ V ≤ 25 Vdc, f = 120 Hz
in
= 500 mA
= 1.0 A (T = +25°C)
I
O
I
O
61
61
–
72
–
–
J
Dropout Voltage
V – V
–
–
–
–
1.7
2.0
1.1
75
–
–
–
–
Vdc
mΩ
A
I
O
Output Resistance (f = 1.0 kHz)
r
O
Short Circuit Current Limit (T = +25°C)
I
SC
J
Output Noise Voltage (T = +25°C)
10 Hz ≤ f ≤ 100 kHz
V
n
µV
A
Average Temperature Coefficient of Output Voltage
TCV
–
±1.5
–
mV/°C
O
I
O
= 5.0 mA
Peak Output Current (T = +25°C)
I
O
–
2.4
–
–
–
A
J
Input Voltage to Maintain Line Regulation (T = +25°C)
14.5
Vdc
J
NOTE: 1. T
to T = 0° to +125°C
high
low
8
MOTOROLA ANALOG IC DEVICE DATA
LM340, A Series
LM340–15
ELECTRICAL CHARACTERISTICS (V = 23 V, I = 500 mA, T = T
to T
[Note 1], unless otherwise noted.)
high
in
O
J
low
Characteristics
Symbol
Min
Typ
Max
Unit
Output Voltage (T = +25°C)
V
O
14.4
15
15.6
Vdc
J
I
O
= 5.0 mA to 1.0 A
Line Regulation (Note 2)
18.5 Vdc to 30 Vdc
Reg
mV
mV
line
–
–
–
–
–
–
–
–
150
150
75
17.5 Vdc to 30 Vdc (T = +25°C)
J
20 Vdc to 26 Vdc, I = 1.0 A
O
17.7 Vdc to 30 Vdc, I = 1.0 A (T = +25°C)
150
O
J
Load Regulation (Note 2)
Reg
load
5.0 mA ≤ I ≤ 1.0 A
–
–
–
–
–
–
150
150
75
O
5.0 mA ≤ I ≤ 1.5 A (T = +25°C)
O
J
250 mA ≤ I ≤ 750 mA (T = +25°C)
O
J
Output Voltage
V
14.25
–
15.75
Vdc
mA
O
17.5 ≤ V ≤ 30 Vdc, 5.0 mA ≤ I ≤ 1.0 A, P ≤ 15 W
in
O
D
Quiescent Current
I
B
I
= 1.0 A
–
–
–
4.0
8.5
8.0
O
J
T = +25°C
Quiescent Current Change
∆I
B
mA
17.5 ≤ V ≤ 30 Vdc, I = 500 mA
–
–
–
–
–
–
1.0
0.5
1.0
in
O
in
O
5.0 mA ≤ I ≤ 1.0 A, V = 23 V
O
17.9 ≤ V ≤ 30 Vdc, I = 1.0 A
in
Ripple Rejection
RR
54
70
–
dB
I
O
= 1.0 mA (T = +25°C)
J
Dropout Voltage
V – V
–
–
–
–
1.7
2.0
800
90
–
–
–
–
Vdc
mΩ
A
I
O
Output Resistance (f = 1.0 kHz)
r
O
Short Circuit Current Limit (T = +25°C)
I
SC
J
Output Noise Voltage (T = +25°C)
10 Hz ≤ f ≤ 100 kHz
V
n
µV
A
Average Temperature Coefficient of Output Voltage
= 5.0 mA
TCV
–
±1.8
–
mV/°C
O
I
O
Peak Output Current (T = +25°C)
I
O
–
2.4
–
–
–
A
J
Input Voltage to Maintain Line Regulation (T = +25°C)
17.7
Vdc
J
I
O
= 1.0 A
NOTES: 1. T
low
to T = 0° to +125°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 separately.
O
Pulse testing with low duty cycle is used.
9
MOTOROLA ANALOG IC DEVICE DATA
LM340, A Series
LM340A–15
ELECTRICAL CHARACTERISTICS (V = 23 V, I = 1.0 mA, T = T
to T
[Note 1], unless otherwise noted.)
high
in
O
J
low
Characteristics
Symbol
Min
Typ
Max
Unit
Output Voltage (T = +25°C)
V
O
14.7
15
15.3
Vdc
J
I
O
= 5.0 mA to 1.0 A
Line Regulation
17.9 Vdc to 30 Vdc, I = 500 mA
Reg
mV
mV
line
–
–
–
–
–
4.0
–
22
22
30
10
O
17.5 Vdc to 30 Vdc (T = +25°C)
J
20 Vdc to 26 Vdc, I = 1.0 A
O
20 Vdc to 26 Vdc, I = 1.0 A (T = +25°C)
–
O
J
Load Regulation
5.0 mA ≤ I ≤ 1.0 A
Reg
load
–
–
–
–
12
–
75
35
21
O
5.0 mA ≤ I ≤ 1.5 A (T = +25°C)
O
J
250 mA ≤ I ≤ 750 mA (T = +25°C)
O
J
Output Voltage
V
14.4
–
15.6
Vdc
mA
mA
O
17.9 ≤ V ≤ 30 Vdc, 5.0 mA ≤ I ≤ 1.0 A, P ≤ 15 W
in
O
D
Quiescent Current
T = +25°C
J
I
B
–
–
–
3.5
6.5
6.0
Quiescent Current Change
∆I
B
5.0 mA ≤ I ≤ 1.0 A, V = 23 V
–
–
–
–
–
–
0.5
0.8
0.8
O
in
O
O
17.9 ≤ V ≤ 30 Vdc, I = 500 mA
in
17.9 ≤ V ≤ 30 Vdc, I = 1.0 A (T = +25°C)
in
J
Ripple Rejection
RR
dB
18.5 ≤ V ≤ 28.5 Vdc, f = 120 Hz
in
= 500 mA
= 1.0 A (T = +25°C)
I
O
I
O
60
60
–
70
–
–
J
Dropout Voltage
V – V
–
–
–
–
1.7
2.0
800
90
–
–
–
–
Vdc
mΩ
A
I
O
Output Resistance (f = 1.0 kHz)
r
O
Short Circuit Current Limit (T = +25°C)
I
SC
J
Output Noise Voltage (T = +25°C)
10 Hz ≤ f ≤ 100 kHz
V
n
µV
A
Average Temperature Coefficient of Output Voltage
TCV
–
±1.8
–
mV/°C
O
I
O
= 5.0 mA
Peak Output Current (T = +25°C)
I
O
–
2.4
–
–
–
A
J
Input Voltage to Maintain Line Regulation (T = +25°C)
17.5
Vdc
J
NOTE: 1. T
to T = 0° to +125°C
high
low
10
MOTOROLA ANALOG IC DEVICE DATA
LM340, A Series
LM340–18
ELECTRICAL CHARACTERISTICS (V = 27 V, I = 500 mA, T = T
to T
[Note 1], unless otherwise noted.)
high
in
O
J
low
Characteristics
Symbol
Min
Typ
Max
Unit
Output Voltage (T = +25°C)
V
O
17.3
18
18.7
Vdc
J
I
O
= 5.0 mA to 1.0 A
Line Regulation
21.5 Vdc to 33 Vdc
21 Vdc to 33 Vdc (T = +25°C)
24 Vdc to 30 Vdc, I = 1.0 A
Reg
mV
mV
line
–
–
–
–
–
–
–
–
180
180
90
J
O
O
21 Vdc to 33 Vdc, I = 1.0 A (T = +25°C)
180
J
Load Regulation
5.0 mA ≤ I ≤ 1.0 A
Reg
load
–
–
–
–
–
–
180
180
90
O
5.0 mA ≤ I ≤ 1.5 A (T = +25°C)
O
J
250 mA ≤ I ≤ 750 mA (T = +25°C)
O
J
Output Voltage
V
17.1
–
18.9
Vdc
mA
O
21 ≤ V ≤ 33 Vdc, 5.0 mA ≤ I ≤ 1.0 A, P ≤ 15 W
in
O
D
Quiescent Current
I
B
I
= 1.0 A
–
–
–
4.0
8.5
8.0
O
J
T = +25°C
Quiescent Current Change
∆I
B
mA
21 ≤ V ≤ 33 Vdc, I = 500 mA
–
–
–
–
–
–
1.0
0.5
1.0
in
O
5.0 mA ≤ I ≤ 1.0 A, V = 27 V
O
in
21 ≤ V ≤ 33 Vdc, I = 1.0 A
in
O
Ripple Rejection
RR
53
69
–
dB
I
O
= 1.0 mA (T = +25°C)
J
Dropout Voltage
V – V
–
–
–
–
1.7
2.0
–
–
–
–
Vdc
mΩ
A
I
O
Output Resistance (f = 1.0 kHz)
r
O
Short Circuit Current Limit (T = +25°C)
I
500
110
J
SC
Output Noise Voltage (T = +25°C)
10 Hz ≤ f ≤ 100 kHz
V
n
µV
A
Average Temperature Coefficient of Output Voltage
= 5.0 mA
TCV
–
±2.3
–
mV/°C
O
I
O
Peak Output Current (T = +25°C)
I
O
–
2.4
–
–
–
A
J
Input Voltage to Maintain Line Regulation (T = +25°C)
21
Vdc
J
I
O
= 1.0 A
NOTE: 1. T
low
to T = 0° to +125°C
high
11
MOTOROLA ANALOG IC DEVICE DATA
LM340, A Series
LM340–24
ELECTRICAL CHARACTERISTICS (V = 33 V, I = 500 mA, T = T
to T
[Note 1], unless otherwise noted.)
high
in
O
J
low
Characteristics
Symbol
Min
Typ
Max
Unit
Output Voltage (T = +25°C)
V
O
23
24
25
Vdc
J
I
O
= 5.0 mA to 1.0 A
Line Regulation
28 Vdc to 38 Vdc
27 Vdc to 38 Vdc (T = +25°C)
30 Vdc to 36 Vdc, I = 1.0 A
27.1 Vdc to 38 Vdc, I = 1.0 A (T = +25°C)
Reg
mV
mV
line
–
–
–
–
–
–
–
–
240
240
120
240
J
O
O
J
Load Regulation
5.0 mA ≤ I ≤ 1.0 A
Reg
load
–
–
–
–
–
–
240
240
120
O
5.0 mA ≤ I ≤ 1.5 A (T = +25°C)
O
J
250 mA ≤ I ≤ 750 mA (T = +25°C)
O
J
Output Voltage
V
22.8
–
25.2
Vdc
mA
O
27 ≤ V ≤ 38 Vdc, 5.0 mA ≤ I ≤ 1.0 A, P ≤ 15 W
in
O
D
Quiescent Current
I
B
I
= 1.0 A
–
–
–
4.0
8.5
8.0
O
J
T = +25°C
Quiescent Current Change
∆I
B
mA
27 ≤ V ≤ 38 Vdc, I = 500 mA
–
–
–
–
–
–
1.0
0.5
1.0
in
O
5.0 mA ≤ I ≤ 1.0 A, V = 33 V
O
in
27.3 ≤ V ≤ 38 Vdc, I = 1.0 A
in
O
Ripple Rejection
RR
50
66
–
dB
I
O
= 1.0 mA (T = +25°C)
J
Dropout Voltage
V – V
–
–
–
–
1.7
2.0
–
–
–
–
Vdc
mΩ
A
I
O
Output Resistance (f = 1.0 kHz)
r
O
Short Circuit Current Limit (T = +25°C)
I
200
170
J
SC
Output Noise Voltage (T = +25°C)
10 Hz ≤ f ≤ 100 kHz
V
n
µV
A
Average Temperature Coefficient of Output Voltage
= 5.0 m
TCV
–
±3.0
–
mV/°C
O
I
O
A
Peak Output Current (T = +25°C)
I
O
–
2.4
–
–
–
A
J
Input Voltage to Maintain Line Regulation (T = +25°C)
27.1
Vdc
J
I
O
= 1.0 A
NOTE: 1. T
to T = 0° to +125°C
high
low
12
MOTOROLA ANALOG IC DEVICE DATA
LM340, A Series
VOLTAGE REGULATOR PERFORMANCE
The performance of a voltage regulator is specified by its
be caused by a change in either input voltage or the load
current. Thermal regulation is a function of IC layout and die
attach techniques, and usually occurs within 10 ms of a
change in power dissipation. After 10 ms, additional changes
in the output voltage are due to the temperature coefficient of
the device.
Figure 1 shows the line and thermal regulation response of
a typical LM340AT–5.0 to a 10 W input pulse. The variation of
the output voltage due to line regulation is labeled À and the
thermal regulation component is labeled Á. Figure 2 shows
the load and thermal regulation response of a typical
LM340AT–5.0 to a 15 W load pulse. The output voltage
variation due to load regulation is labeled À and the thermal
regulation component is labeled Á.
immunity to changes in load, input voltage, power dissipation,
and temperature. Line and load regulation are tested with a
pulse of short duration (< 100 µs) and are strictly a function of
electrical gain. However, pulse widths of longer duration
(> 1.0 ms) are sufficient to affect temperature gradients
across the die. These temperature gradients can cause a
change in the output voltage, in addition to changes caused
by line and load regulation. Longer pulse widths and thermal
gradients make it desirable to specify thermal regulation.
Thermal regulation is defined as the change in output
voltage caused by a change in dissipated power for a
specified time, and is expressed as a percentage output
voltage change per watt. The change in dissipated power can
Figure 1. Line and Thermal Regulation
Figure 2. Load and Thermal Regulation
2
2
2
1
1
2
18 V
2.0
8.0 V
0
t, TIME (2.0 ms/DIV)
LM340AT–5.0
t, TIME (2.0 ms/DIV)
LM340AT–5.0
V
= 5.0 V
V
= 5.0 V
= 15 V
in
out
out
1
2
1
2
= Reg
= 4.4 mV
= Reg
= Reg
= 2.4 mV
line
line
V
I
= 8.0 V
→
18 V
→
8.0 V
V
I
in
out
= 1.0 A
= 0 A
→ 1.5 A → 0 A
= 0.0030% V /W
= Reg
= 0.0020% V /W
out
therm
O
therm
O
Figure 3. Temperature Stability
Figure 4. Output Impedance
0
10
1.02
1.01
1.00
0.99
0.98
V
I
– V
= 5.0 V
= 100 mA
–1
in
out
10
10
out
V
V
= 5.0 V
out
in
= 7.5 V
= 1.0 A
= 0
I
C
–2
out
O
J
T
= 25
°C
–3
10
10
–4
–90
–50
–10
30
70
110
C)
150
190
1.0
10
100
1.0 k
10 k
100 k
1.0 M 10 M 100 M
T , JUNCTION TEMPERATURE (
°
f, FREQUENCY (Hz)
J
13
MOTOROLA ANALOG IC DEVICE DATA
LM340, A Series
Figure 5. Ripple Rejection versus Frequency
Figure 6. Ripple Rejection versus Output Current
100
100
I
= 50 mA
out
80
60
40
20
80
60
I
V
V
C
T
= 1.5 A
= 5.0 V
= 10 V
= 0
out
out
in
O
V
V
V
C
= 5.0 V
= 10 V
= 10 V
= 0
out
in
in
O
= 25°C
J
f = 120 Hz
= 25
T
°C
J
40
30
1.0
10
100
1.0 k
10 k
100 k
1.0 M 10 M 100 M
0.01
0.1
1.0
10
f, FREQUENCY (Hz)
I
, OUTPUT CURRENT (A)
out
Figure 7. Quiescent Current versus
Input Voltage
Figure 8. Quiescent Current versus
Output Current
4.0
3.0
2.0
5.0
4.0
3.0
2.0
1.0
0
T
J
in
= 25
– V
°C
T
= 25
= 5.0 V
= 1.0 A
°
C
J
V
= 5.0 V
V
I
out
out
out
1.0
0
0
10
20
, INPUT VOLTAGE (Vdc)
30
40
0.01
0.1
I , OUTPUT CURRENT (A)
out
1.0
10
V
in
Figure 9. Dropout Voltage
Figure 10. Peak Output Current
2.5
2.0
1.5
1.0
0.5
0
4.0
∆
V
= 100 mV
out
I
= 1.0 A
O
3.0
2.0
1.0
I
= 500 mA
O
I
= 10 mA
O
T
= 25°C
J
0
0
10
V –V , INPUT–OUTPUT VOLTAGE DIFFERENTIAL (V)
in out
20
30
40
–75
–50
–25
0
25
50
75
C)
100
125
T , AMBIENT TEMPERATURE (
°
A
14
MOTOROLA ANALOG IC DEVICE DATA
LM340, A Series
Figure 11. Line Transient Response
Figure 12. Load Transient Response
0.8
0.6
0.4
0.2
0
0.3
0.2
0.1
0
V
= 5.0 V
= 150 mA
= 0
out
I
C
out
O
T
= 25°C
J
–0.1
V
V
C
T
= 5.0 V
= 10 V
= 0
out
in
O
J
–0.2
–0.4
–0.6
–0.2
–0.3
= 25°C
1.5
1.0
1.0
0.5
0
0.5
0
0
10
20
30
40
0
10
20
30
40
t, TIME (µs)
t, TIME (µs)
Figure 13. Worst Case Power Dissipation
versus Ambient Temperature (Case 221A)
20
16
12
θ
θ
T
= 5
°
C/W
= 65 C/W
= 150
JC
JA
°
θ
= 0°C/W
HS
°C
J(max)
θ
= 5°C/W
HS
θ
= 15°C/W
8.0
4.0
HS
No Heatsink
0
–50
–25
0
25
50
75
100
125
150
T , AMBIENT TEMPERATURE (
°C)
A
15
MOTOROLA ANALOG IC DEVICE DATA
LM340, A Series
APPLICATIONS INFORMATION
Design Considerations
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.
The LM340, A 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
Figure 14. Current Regulator
Figure 15. Adjustable Output Regulator
LM340–5.0
Output
Input
LM340–5.0
Input
R
0.33µF
Constant
Current to
Grounded Load
7
4
I
O
2
3
–
+
0.33µF
0.1µF
6
These regulators can also be used as a current source when
connected as above. In order to minimize dissipation the LM340–5.0
is chosen in this application. Resistor R determines the current as
follows:
10k
1k
MC1741G
5.0 V
R
I
=
+ I
Q
O
V
, 7.0 V to 20 V
– V ≥ 2.0 V
O
out
V
in
I
1.5 mA over line and load changes
Q
For example, a 1 A current source would require R to be a 5
10 W resistor and the output voltage compliance would be the input
voltage less 7.0 V.
Ω
,
Theadditionofanoperationalamplifierallowsadjustmenttohigheror
intermediate values while retaining regulation characteristics. The
minimum voltage obtainable with this arrangement is 2.0 V greater
than the regulator voltage.
Figure 16. Current Boost Regulator
Figure 17. Short Circuit Protection
MJ2955
or Equiv.
MJ2955 or Equiv
Input
R
SC
Input
R
LM340
Output
2N6049
or Equiv.
R
LM340
Output
1.0µF
0.1µF
1.0µF
The LM340, A series can be current boosted with a PNP transistor. The
The circuit of Figure 17 can be modified to provide supply protection
MJ2955 provides current to 5.0 A. Resistor R in conjuction with the V
of the PNP determines when the pass transistor begins conducting; this
circuit is not short circuit proof. Input–output differential voltage
against short circuits by adding a short circuit sense resistor, R , and
BE
SC
an additional PNP transistor. The current sensing PNP must be able to
handle the short circuit current of the three–terminal regulator.
Therefore, 4.0 A plastic power transistor is specified.
minimum is increased by V
of the pass transistor.
BE
16
MOTOROLA ANALOG IC DEVICE DATA
LM340, A 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. DIMENSION Z DEFINES A ZONE WHERE ALL
BODY AND LEAD IRREGULARITIES ARE
ALLOWED.
SEATING
PLANE
–T–
C
S
B
F
T
4
1
INCHES
MIN
MILLIMETERS
DIM
A
B
C
D
F
G
H
J
K
L
N
Q
R
S
MAX
0.620
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
–––
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
4.82
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
–––
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
2
3
U
H
L
R
J
V
T
U
V
G
D
Z
0.080
2.04
N
17
MOTOROLA ANALOG IC DEVICE DATA
LM340, A Series
NOTES
18
MOTOROLA ANALOG IC DEVICE DATA
LM340, A Series
NOTES
19
MOTOROLA ANALOG IC DEVICE DATA
LM340, A Series
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ASIA/PACIFIC: Motorola Semiconductors H.K. Ltd.; 8B Tai Ping Industrial Park,
51 Ting Kok Road, Tai Po, N.T., Hong Kong. 852–26629298
LM340/D
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