LM340, A
Series
SEMICONDUCTOR
TECHNICAL DATA
THREETERMINAL
POSITIVE FIXED
VOLTAGE REGULATORS
Order this document by LM340/D
Pin 1. Input
2. Ground
3. Output
T SUFFIX
PLASTIC PACKAGE
CASE 221A
Heatsink surface is connected to Pin 2.
3
1
2
Simplified Application
A common ground is required between the input and
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.
XX these two digits of the type number indicate
voltage.
* Cin is required if regulator is located an
appreciable distance from power supply filter.
** CO is not needed for stability; however, it does
improve transient response. If needed, use a
0.1
F ceramic disc.
LM340XX
Input
Cin*
0.33
F
CO**
Output
1
MOTOROLA ANALOG IC DEVICE DATA
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 threeterminal regulators
employ internal current limiting, thermal shutdown, and safearea
compensation. Devices are available with improved specifications, including
a 2% output voltage tolerance, on Asuffix 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 seriespass transistor to
boost output current capability at the nominal output voltage.
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 SafeArea Compensation
ORDERING INFORMATION
Device
Output Voltage
and Tolerance
Operating
Temperature Range
Package
LM340T5.0
5.0 V
4%
T
0
12
C
Pl
i P
LM340AT5.0
5.0 V
2%
T
0
12
C
Pl
i P
LM340T6.0
6.0 V
4%
T
0
12
C
Pl
i P
LM340T8.0
8.0 V
4%
T
0
12
C
Pl
i P
LM340T12
12 V
4%
TJ = 0
to +125
C
Plastic Power
LM340AT12
12 V
2%
TJ = 0
to +125
C
Plastic Power
LM340T15
15 V
4%
LM340AT15
15 V
2%
LM340T18
18 V
4%
LM340T24
24 V
4%
* 2% regulators are available in 5, 12 and 15 V devices.
Motorola, Inc. 1996
Rev 1
LM340, A Series
2
MOTOROLA ANALOG IC DEVICE DATA
MAXIMUM RATINGS
(TA = +25
C unless otherwise noted.)
Rating
Symbol
Value
Unit
Input Voltage (5.0 V 18 V)
Input Voltage
(24 V)
Vin
35
40
Vdc
Power Dissipation and Thermal Characteristics
Plastic Package
TA = +25
C
Derate above TA = +25
C
Thermal Resistance, JunctiontoAir
TC= +25
C
Derate above TC = +75
C (See Figure 1)
Thermal Resistance, JunctiontoCase
PD
1/
JA
JA
PD
1/
JA
JC
Internally Limited
15.4
65
Internally Limited
200
5.0
W
mW/
C
C/W
W
mW/
C
C/W
Storage Temperature Range
Tstg
65 to +150
C
Operating Junction Temperature Range
TJ
0 to +150
C
Representative Schematic Diagram
1.0k
210
Input
16k
6.7V
300
1.0k
100
200
3.6k
6.4k
520
3.0k
5.6k
10pF
300
13
0.12
Output
200
50
2.6k
6.0k
40
pF
Gnd
2.8k
3.9k
2.0k
6.0k
1.0k
LM340, A Series
3
MOTOROLA ANALOG IC DEVICE DATA
LM3405.0
ELECTRICAL CHARACTERISTICS
(Vin = 10 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)
Characteristics
Symbol
Min
Typ
Max
Unit
Output Voltage (TJ = +25
C)
IO = 5.0 mA to 1.0 A
VO
4.8
5.0
5.2
Vdc
Line Regulation (Note 2)
8.0 Vdc to 20 Vdc
7.0 Vdc to 25 Vdc (TJ = +25
C)
8.0 Vdc to 12 Vdc, IO = 1.0 A
7.3 Vdc to 20 Vdc, IO = 1.0 A (TJ = +25
C)
Regline
50
50
25
50
mV
Load Regulation (Note 2)
5.0 mA
IO
1.0 A
5.0 mA
IO
1.5 A (TJ = +25
C)
250 mA
IO
750 mA (TJ = +25
C)
Regload
50
50
25
mV
Output Voltage
7.0
Vin
20 Vdc, 5.0 mA
IO
1.0 A, PD
15 W
VO
4.75
5.25
Vdc
Quiescent Current
IO = 1.0 A
TJ = +25
C
IB
4.0
8.5
8.0
mA
Quiescent Current Change
7.0
Vin
25 Vdc, IO = 500 mA
5.0 mA
IO
1.0 A, Vin = 10 V
7.5
Vin
20 Vdc, IO = 1.0 A
IB
1.0
0.5
1.0
mA
Ripple Rejection
IO = 1.0 A (TJ = +25
C)
RR
62
80
dB
Dropout Voltage
VI VO
1.7
Vdc
Output Resistance (f = 1.0 kHz)
rO
2.0
m
Short Circuit Current Limit (TJ = +25
C)
ISC
2.0
A
Output Noise Voltage (TA = +25
C)
10 Hz
f
100 kHz
Vn
40
V
Average Temperature Coefficient of Output Voltage
IO = 5.0 mA
TCVO
0.6
mV/
C
Peak Output Current (TJ = +25
C)
IO
2.4
A
Input Voltage to Maintain Line Regulation (TJ = +25
C)
IO = 1.0 A
7.3
Vdc
NOTES: 1. Tlow to Thigh = 0
to +125
C
2. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately.
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.
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.
LM340, A Series
4
MOTOROLA ANALOG IC DEVICE DATA
LM340A5.0
ELECTRICAL CHARACTERISTICS
(Vin = 10 V, IO = 1.0 A, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)
Characteristics
Symbol
Min
Typ
Max
Unit
Output Voltage (TJ = +25
C)
IO = 5.0 mA to 1.0 A
VO
4.9
5.0
5.1
Vdc
Line Regulation
7.5 Vdc to 20 Vdc, IO = 500 mA
7.3 Vdc to 25 Vdc (TJ = +25
C)
8.0 Vdc to 12 Vdc
8.0 Vdc to 12 Vdc (TJ = +25
C)
Regline
3.0
10
10
12
4.0
mV
Load Regulation
5.0 mA
IO
1.0 A
5.0 mA
IO
1.5 A (TJ = +25
C)
250 mA
IO
750 mA (TJ = +25
C)
Regload
25
25
15
mV
Output Voltage
7.5
Vin
20 Vdc, 5.0 mA
IO
1.0 A, PD
15 W
VO
4.8
5.2
Vdc
Quiescent Current
TJ = +25
C
IB
3.5
6.5
6.0
mA
Quiescent Current Change
5.0 mA
IO
1.0 A, Vin = 10 V
8.0
Vin
25 Vdc, IO = 500 mA
7.5
Vin
20 Vdc, IO = 1.0 A (TJ = +25
C)
IB
0.5
0.8
0.8
mA
Ripple Rejection
8.0
Vin
18 Vdc, f = 120 Hz
IO = 500 mA
IO = 1.0 A (TJ = +25
C)
RR
68
68
80
dB
Dropout Voltage
VI VO
1.7
Vdc
Output Resistance (f = 1.0 kHz)
rO
2.0
m
Short Circuit Current Limit (TJ = +25
C)
ISC
2.0
A
Output Noise Voltage (TA = +25
C)
10 Hz
f
100 kHz
Vn
40
V
Average Temperature Coefficient of Output Voltage
IO = 5.0 mA
TCVO
0.6
mV/
C
Peak Output Current (TJ = +25
C)
IO
2.4
A
Input Voltage to Maintain Line Regulation (TJ = +25
C)
IO = 1.0 A
7.3
Vdc
NOTE: 1. Tlow to Thigh = 0
to +125
C
LM340, A Series
5
MOTOROLA ANALOG IC DEVICE DATA
LM3406.0
ELECTRICAL CHARACTERISTICS
(Vin = 11 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)
Characteristics
Symbol
Min
Typ
Max
Unit
Output Voltage (TJ = +25
C)
IO = 5.0 mA to 1.0 A
VO
5.75
6.0
6.25
Vdc
Line Regulation
9.0 Vdc to 21 Vdc
8.0 Vdc to 25 Vdc (TJ = +25
C)
9.0 Vdc to 13 Vdc, IO = 1.0 A
8.3 Vdc to 21 Vdc, IO = 1.0 A (TJ = +25
C)
Regline
60
60
30
60
mV
Load Regulation
5.0 mA
IO
1.0 A
5.0 mA
IO
1.5 A (TJ = +25
C)
250 mA
IO
750 mA (TJ = +25
C)
Regload
60
60
30
mV
Output Voltage
8.0
Vin
21 Vdc, 6.0 mA
IO
1.0 A, PD
15 W
VO
5.7
6.3
Vdc
Quiescent Current
IO = 1.0 A
TJ = +25
C
IB
4.0
8.5
8.0
mA
Quiescent Current Change
8.0
Vin
25 Vdc, IO = 500 mA
5.0 mA
IO
1.0 A, Vin = 11 V
8.6
Vin
21 Vdc, IO = 1.0 A
IB
1.0
0.5
1.0
mA
Ripple Rejection
IO = 1.0 A (TJ = +25
C)
RR
59
78
dB
Dropout Voltage
VI VO
1.7
Vdc
Output Resistance (f = 1.0 kHz)
rO
2.0
m
Short Circuit Current Limit (TJ = +25
C)
ISC
1.9
A
Output Noise Voltage (TA = +25
C)
10 Hz
f
100 kHz
Vn
45
V
Average Temperature Coefficient of Output Voltage
IO = 5.0 mA
TCVO
0.7
mV/
C
Peak Output Current (TJ = +25
C)
IO
2.4
A
Input Voltage to Maintain Line Regulation (TJ = +25
C)
IO = 1.0 A
8.3
Vdc
NOTE: 1. Tlow to Thigh = 0
to +125
C
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