MOTOROLA LM340T-24 Three terminal positive fixed voltage regulator Datasheet

Order this document by LM340/D
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.
• Output Current in Excess of 1.0 A
•
•
•
•
•
THREE–TERMINAL
POSITIVE FIXED
VOLTAGE REGULATORS
SEMICONDUCTOR
TECHNICAL DATA
T SUFFIX
PLASTIC PACKAGE
CASE 221A
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
Pin 1. Input
2. Ground
3. Output
1
2
3
Heatsink surface is connected to Pin 2.
Simplified Application
Input
ORDERING INFORMATION
Device
Output Voltage
and Tolerance
LM340T–5.0
5.0 V ± 4%
LM340AT–5.0
5.0 V ± 2%
LM340T–6.0
6.0 V ± 4%
LM340T–8.0
8.0 V ± 4%
LM340T–12
12 V ± 4%
LM340AT–12
12 V ± 2%
LM340T–15
15 V ± 4%
LM340AT–15
15 V ± 2%
LM340T–18
18 V ± 4%
LM340T–24
24 V ± 4%
Operating
Temperature Range
Cin*
0.33µF
LM340–XX
Output
CO**
Package
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.
TJ = 0°
0 to +125°C
12 C
Pl i Power
Plastic
P
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 µF ceramic disc.
* 2% regulators are available in 5, 12 and 15 V devices.
 Motorola, Inc. 1996
MOTOROLA ANALOG IC DEVICE DATA
Rev 1
1
LM340, A Series
MAXIMUM RATINGS (TA = +25°C unless otherwise noted.)
Rating
Symbol
Value
Unit
Vin
35
40
Vdc
Power Dissipation and Thermal Characteristics
Plastic Package
TA = +25°C
Derate above TA = +25°C
Thermal Resistance, Junction–to–Air
PD
1/θJA
θJA
Internally Limited
15.4
65
W
mW/°C
°C/W
TC= +25°C
Derate above TC = +75°C (See Figure 1)
Thermal Resistance, Junction–to–Case
PD
1/θJA
θJC
Internally Limited
200
5.0
W
mW/°C
°C/W
Tstg
–65 to +150
°C
TJ
0 to +150
°C
Input Voltage (5.0 V – 18 V)
Input Voltage (24 V)
Storage Temperature Range
Operating Junction Temperature Range
Representative Schematic Diagram
1.0k
Input
1.0k
210
6.7V
16k
100
1.0k
300
200
3.0k
3.6k
10pF
5.6k
6.4k
300
13
50
520
0.12
200
Output
40
pF
2.6k
6.0k
2.0k
3.9k
6.0k
2
2.8k
Gnd
MOTOROLA ANALOG IC DEVICE DATA
LM340, A Series
LM340–5.0
ELECTRICAL CHARACTERISTICS (Vin = 10 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)
Characteristics
Output Voltage (TJ = +25°C)
IO = 5.0 mA to 1.0 A
Symbol
Min
Typ
Max
Unit
VO
4.8
5.0
5.2
Vdc
–
–
–
–
–
–
–
–
50
50
25
50
–
–
–
–
–
–
50
50
25
4.75
–
5.25
–
–
–
4.0
8.5
8.0
–
–
–
–
–
–
1.0
0.5
1.0
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
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
Output Voltage
7.0 ≤ Vin ≤ 20 Vdc, 5.0 mA ≤ IO ≤ 1.0 A, PD ≤ 15 W
VO
Quiescent Current
IO = 1.0 A
TJ = +25°C
IB
mV
mV
Vdc
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
Ripple Rejection
IO = 1.0 A (TJ = +25°C)
RR
62
80
–
dB
Dropout Voltage
mA
VI – VO
–
1.7
–
Vdc
Output Resistance (f = 1.0 kHz)
rO
–
2.0
–
mΩ
Short Circuit Current Limit (TJ = +25°C)
ISC
–
2.0
–
A
Output Noise Voltage (TA = +25°C)
10 Hz ≤ f ≤ 100 kHz
Vn
–
40
–
µV
TCVO
–
±0.6
–
mV/°C
IO
–
2.4
–
A
7.3
–
–
Vdc
Average Temperature Coefficient of Output Voltage
IO = 5.0 mA
Peak Output Current (TJ = +25°C)
Input Voltage to Maintain Line Regulation (TJ = +25°C)
IO = 1.0 A
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.
MOTOROLA ANALOG IC DEVICE DATA
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.
3
LM340, A Series
LM340A–5.0
ELECTRICAL CHARACTERISTICS (Vin = 10 V, IO = 1.0 A, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)
Characteristics
Output Voltage (TJ = +25°C)
IO = 5.0 mA to 1.0 A
Symbol
Min
Typ
Max
Unit
VO
4.9
5.0
5.1
Vdc
–
–
–
–
–
3.0
–
–
10
10
12
4.0
–
–
–
–
–
–
25
25
15
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
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
mV
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
–
–
–
–
–
–
0.5
0.8
0.8
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
Ripple Rejection
8.0 ≤ Vin ≤ 18 Vdc, f = 120 Hz
IO = 500 mA
IO = 1.0 A (TJ = +25°C)
RR
mA
dB
68
68
–
80
–
–
VI – VO
–
1.7
–
Vdc
Output Resistance (f = 1.0 kHz)
rO
–
2.0
–
mΩ
Short Circuit Current Limit (TJ = +25°C)
ISC
–
2.0
–
A
Output Noise Voltage (TA = +25°C)
10 Hz ≤ f ≤ 100 kHz
Vn
–
40
–
µV
TCVO
–
±0.6
–
mV/°C
IO
–
2.4
–
A
7.3
–
–
Vdc
Dropout Voltage
Average Temperature Coefficient of Output Voltage
IO = 5.0 mA
Peak Output Current (TJ = +25°C)
Input Voltage to Maintain Line Regulation (TJ = +25°C)
IO = 1.0 A
NOTE: 1. Tlow to Thigh = 0° to +125°C
4
MOTOROLA ANALOG IC DEVICE DATA
LM340, A Series
LM340–6.0
ELECTRICAL CHARACTERISTICS (Vin = 11 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)
Characteristics
Output Voltage (TJ = +25°C)
IO = 5.0 mA to 1.0 A
Symbol
Min
Typ
Max
Unit
VO
5.75
6.0
6.25
Vdc
–
–
–
–
–
–
–
–
60
60
30
60
–
–
–
–
–
–
60
60
30
5.7
–
6.3
–
–
–
4.0
8.5
8.0
–
–
–
–
–
–
1.0
0.5
1.0
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
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
Output Voltage
8.0 ≤ Vin ≤ 21 Vdc, 6.0 mA ≤ IO ≤ 1.0 A, PD ≤ 15 W
VO
Quiescent Current
IO = 1.0 A
TJ = +25°C
IB
mV
mV
Vdc
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
Ripple Rejection
IO = 1.0 A (TJ = +25°C)
RR
59
78
–
dB
Dropout Voltage
mA
VI – VO
–
1.7
–
Vdc
Output Resistance (f = 1.0 kHz)
rO
–
2.0
–
mΩ
Short Circuit Current Limit (TJ = +25°C)
ISC
–
1.9
–
A
Output Noise Voltage (TA = +25°C)
10 Hz ≤ f ≤ 100 kHz
Vn
–
45
–
µV
TCVO
–
±0.7
–
mV/°C
IO
–
2.4
–
A
8.3
–
–
Vdc
Average Temperature Coefficient of Output Voltage
IO = 5.0 mA
Peak Output Current (TJ = +25°C)
Input Voltage to Maintain Line Regulation (TJ = +25°C)
IO = 1.0 A
NOTE: 1. Tlow to Thigh = 0° to +125°C
MOTOROLA ANALOG IC DEVICE DATA
5
LM340, A Series
LM340–8.0
ELECTRICAL CHARACTERISTICS (Vin = 14 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)
Characteristics
Output Voltage (TJ = +25°C)
IO = 5.0 mA to 1.0 A
Symbol
Min
Typ
Max
Unit
VO
7.7
8.0
8.3
Vdc
–
–
–
–
–
–
–
–
80
80
40
80
–
–
–
–
–
–
80
80
40
7.6
–
8.4
–
–
–
4.0
8.5
8.0
–
–
–
–
–
–
1.0
0.5
1.0
Line Regulation
11 Vdc to 23 Vdc
10.5 Vdc to 25 Vdc (TJ = +25°C)
11 Vdc to 17 Vdc, IO = 1.0 A
10.5 Vdc to 23 Vdc, IO = 1.0 A (TJ = +25°C)
Regline
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
Output Voltage
10.5 ≤ Vin ≤ 23 Vdc, 5.0 mA ≤ IO ≤ 1.0 A, PD ≤ 15 W
VO
Quiescent Current
IO = 1.0 A
TJ = +25°C
IB
mV
mV
Vdc
mA
Quiescent Current Change
10.5 ≤ Vin ≤ 25 Vdc, IO = 500 mA
5.0 mA ≤ IO ≤ 1.0 A, Vin = 14 V
10.6 ≤ Vin ≤ 23 Vdc, IO = 1.0 A
∆IB
Ripple Rejection
IO = 1.0 A (TJ = +25°C)
RR
56
76
–
dB
Dropout Voltage
mA
VI – VO
–
1.7
–
Vdc
Output Resistance (f = 1.0 kHz)
rO
–
2.0
–
mΩ
Short Circuit Current Limit (TJ = +25°C)
ISC
–
1.5
–
A
Output Noise Voltage (TA = +25°C)
10 Hz ≤ f ≤ 100 kHz
Vn
–
52
–
µV
TCVO
–
±1.0
–
mV/°C
IO
–
2.4
–
A
10.5
–
–
Vdc
Average Temperature Coefficient of Output Voltage
IO = 5.0 mA
Peak Output Current (TJ = +25°C)
Input Voltage to Maintain Line Regulation (TJ = +25°C)
IO = 1.0 A
NOTE: 1. Tlow to Thigh = 0° to +125°C
6
MOTOROLA ANALOG IC DEVICE DATA
LM340, A Series
LM340–12
ELECTRICAL CHARACTERISTICS (Vin = 19 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)
Characteristics
Output Voltage (TJ = +25°C)
IO = 5.0 mA to 1.0 A
Symbol
Min
Typ
Max
Unit
VO
11.5
12
12.5
Vdc
–
–
–
–
–
–
–
–
120
120
60
120
–
–
–
–
–
–
120
120
60
11.4
–
12.6
–
–
–
4.0
8.5
8.0
–
–
–
–
–
–
1.0
0.5
1.0
Line Regulation (Note 2)
15 Vdc to 27 Vdc
14.6 Vdc to 30 Vdc (TJ = +25°C)
16 Vdc to 22 Vdc, IO = 1.0 A
14.6 Vdc to 27 Vdc, IO = 1.0 A (TJ = +25°C)
Regline
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
Output Voltage
14.5 ≤ Vin ≤ 27 Vdc, 5.0 mA ≤ IO ≤ 1.0 A, PD ≤ 15 W
VO
Quiescent Current
IO = 1.0 A
TJ = +25°C
IB
mV
mV
Vdc
mA
Quiescent Current Change
14.5 ≤ Vin ≤ 30 Vdc, IO = 500 mA
5.0 mA ≤ IO ≤ 1.0 A, Vin = 19 V
14.8 ≤ Vin ≤ 27 Vdc, IO = 1.0 A
∆IB
Ripple Rejection
IO = 1.0 A (TJ = +25°C)
RR
55
72
–
dB
Dropout Voltage
mA
VI – VO
–
1.7
–
Vdc
Output Resistance (f = 1.0 kHz)
rO
–
2.0
–
mΩ
Short Circuit Current Limit (TJ = +25°C)
ISC
–
1.1
–
A
Output Noise Voltage (TA = +25°C)
10 Hz ≤ f ≤ 100 kHz
Vn
–
75
–
µV
TCVO
–
±1.5
–
mV/°C
IO
–
2.4
–
A
14.6
–
–
Vdc
Average Temperature Coefficient of Output Voltage
IO = 5.0 mA
Peak Output Current (TJ = +25°C)
Input Voltage to Maintain Line Regulation (TJ = +25°C)
IO = 1.0 A
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.
MOTOROLA ANALOG IC DEVICE DATA
7
LM340, A Series
LM340A–12
ELECTRICAL CHARACTERISTICS (Vin = 19 V, IO = 1.0 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)
Characteristics
Output Voltage (TJ = +25°C)
IO = 5.0 mA to 1.0 A
Symbol
Min
Typ
Max
Unit
VO
11.75
12
12.25
Vdc
–
–
–
–
–
4.0
–
–
18
18
30
9.0
–
–
–
–
–
–
60
32
19
Line Regulation
14.8 Vdc to 27 Vdc, IO = 500 mA
14.5 Vdc to 30 Vdc (TJ = +25°C)
16 Vdc to 22 Vdc
16 Vdc to 22 Vdc (TJ = +25°C)
Regline
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
mV
mV
Output Voltage
14.8 ≤ Vin ≤ 27 Vdc, 5.0 mA ≤ IO ≤ 1.0 A, PD ≤ 15 W
VO
11.5
–
12.5
Vdc
Quiescent Current
TJ = +25°C
IB
–
–
–
3.5
6.5
6.0
mA
–
–
–
–
–
–
0.5
0.8
0.8
Quiescent Current Change
5.0 mA ≤ IO ≤ 1.0 A, Vin = 19 V
15 ≤ Vin ≤ 30 Vdc, IO = 500 mA
14.8 ≤ Vin ≤ 27 Vdc, IO = 1.0 A(TJ = +25°C)
∆IB
Ripple Rejection
15 ≤ Vin ≤ 25 Vdc, f = 120 Hz
IO = 500 mA
IO = 1.0 A (TJ = +25°C)
RR
mA
dB
61
61
–
72
–
–
VI – VO
–
1.7
–
Vdc
Output Resistance (f = 1.0 kHz)
rO
–
2.0
–
mΩ
Short Circuit Current Limit (TJ = +25°C)
ISC
–
1.1
–
A
Output Noise Voltage (TA = +25°C)
10 Hz ≤ f ≤ 100 kHz
Vn
–
75
–
µV
TCVO
–
±1.5
–
mV/°C
IO
–
2.4
–
A
14.5
–
–
Vdc
Dropout Voltage
Average Temperature Coefficient of Output Voltage
IO = 5.0 mA
Peak Output Current (TJ = +25°C)
Input Voltage to Maintain Line Regulation (TJ = +25°C)
NOTE: 1. Tlow to Thigh = 0° to +125°C
8
MOTOROLA ANALOG IC DEVICE DATA
LM340, A Series
LM340–15
ELECTRICAL CHARACTERISTICS (Vin = 23 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)
Characteristics
Output Voltage (TJ = +25°C)
IO = 5.0 mA to 1.0 A
Symbol
Min
Typ
Max
Unit
VO
14.4
15
15.6
Vdc
–
–
–
–
–
–
–
–
150
150
75
150
–
–
–
–
–
–
150
150
75
14.25
–
15.75
–
–
–
4.0
8.5
8.0
–
–
–
–
–
–
1.0
0.5
1.0
Line Regulation (Note 2)
18.5 Vdc to 30 Vdc
17.5 Vdc to 30 Vdc (TJ = +25°C)
20 Vdc to 26 Vdc, IO = 1.0 A
17.7 Vdc to 30 Vdc, IO = 1.0 A (TJ = +25°C)
Regline
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
Output Voltage
17.5 ≤ Vin ≤ 30 Vdc, 5.0 mA ≤ IO ≤ 1.0 A, PD ≤ 15 W
VO
Quiescent Current
IO = 1.0 A
TJ = +25°C
IB
mV
mV
Vdc
mA
Quiescent Current Change
17.5 ≤ Vin ≤ 30 Vdc, IO = 500 mA
5.0 mA ≤ IO ≤ 1.0 A, Vin = 23 V
17.9 ≤ Vin ≤ 30 Vdc, IO = 1.0 A
∆IB
Ripple Rejection
IO = 1.0 mA (TJ = +25°C)
RR
54
70
–
dB
VI – VO
–
1.7
–
Vdc
Output Resistance (f = 1.0 kHz)
rO
–
2.0
–
mΩ
Short Circuit Current Limit (TJ = +25°C)
ISC
–
800
–
A
Output Noise Voltage (TA = +25°C)
10 Hz ≤ f ≤ 100 kHz
Vn
–
90
–
µV
TCVO
–
±1.8
–
mV/°C
IO
–
2.4
–
A
17.7
–
–
Vdc
Dropout Voltage
Average Temperature Coefficient of Output Voltage
IO = 5.0 mA
Peak Output Current (TJ = +25°C)
Input Voltage to Maintain Line Regulation (TJ = +25°C)
IO = 1.0 A
mA
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.
MOTOROLA ANALOG IC DEVICE DATA
9
LM340, A Series
LM340A–15
ELECTRICAL CHARACTERISTICS (Vin = 23 V, IO = 1.0 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)
Characteristics
Output Voltage (TJ = +25°C)
IO = 5.0 mA to 1.0 A
Symbol
Min
Typ
Max
Unit
VO
14.7
15
15.3
Vdc
–
–
–
–
–
4.0
–
–
22
22
30
10
–
–
–
–
12
–
75
35
21
Line Regulation
17.9 Vdc to 30 Vdc, IO = 500 mA
17.5 Vdc to 30 Vdc (TJ = +25°C)
20 Vdc to 26 Vdc, IO = 1.0 A
20 Vdc to 26 Vdc, IO = 1.0 A (TJ = +25°C)
Regline
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
mV
mV
Output Voltage
17.9 ≤ Vin ≤ 30 Vdc, 5.0 mA ≤ IO ≤ 1.0 A, PD ≤ 15 W
VO
14.4
–
15.6
Vdc
Quiescent Current
TJ = +25°C
IB
–
–
–
3.5
6.5
6.0
mA
–
–
–
–
–
–
0.5
0.8
0.8
Quiescent Current Change
5.0 mA ≤ IO ≤ 1.0 A, Vin = 23 V
17.9 ≤ Vin ≤ 30 Vdc, IO = 500 mA
17.9 ≤ Vin ≤ 30 Vdc, IO = 1.0 A (TJ = +25°C)
∆IB
Ripple Rejection
18.5 ≤ Vin ≤ 28.5 Vdc, f = 120 Hz
IO = 500 mA
IO = 1.0 A (TJ = +25°C)
RR
mA
dB
60
60
–
70
–
–
VI – VO
–
1.7
–
Vdc
Output Resistance (f = 1.0 kHz)
rO
–
2.0
–
mΩ
Short Circuit Current Limit (TJ = +25°C)
ISC
–
800
–
A
Output Noise Voltage (TA = +25°C)
10 Hz ≤ f ≤ 100 kHz
Vn
–
90
–
µV
TCVO
–
±1.8
–
mV/°C
IO
–
2.4
–
A
17.5
–
–
Vdc
Dropout Voltage
Average Temperature Coefficient of Output Voltage
IO = 5.0 mA
Peak Output Current (TJ = +25°C)
Input Voltage to Maintain Line Regulation (TJ = +25°C)
NOTE: 1. Tlow to Thigh = 0° to +125°C
10
MOTOROLA ANALOG IC DEVICE DATA
LM340, A Series
LM340–18
ELECTRICAL CHARACTERISTICS (Vin = 27 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)
Characteristics
Output Voltage (TJ = +25°C)
IO = 5.0 mA to 1.0 A
Symbol
Min
Typ
Max
Unit
VO
17.3
18
18.7
Vdc
–
–
–
–
–
–
–
–
180
180
90
180
–
–
–
–
–
–
180
180
90
17.1
–
18.9
–
–
–
4.0
8.5
8.0
–
–
–
–
–
–
1.0
0.5
1.0
Line Regulation
21.5 Vdc to 33 Vdc
21 Vdc to 33 Vdc (TJ = +25°C)
24 Vdc to 30 Vdc, IO = 1.0 A
21 Vdc to 33 Vdc, IO = 1.0 A (TJ = +25°C)
Regline
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
Output Voltage
21 ≤ Vin ≤ 33 Vdc, 5.0 mA ≤ IO ≤ 1.0 A, PD ≤ 15 W
VO
Quiescent Current
IO = 1.0 A
TJ = +25°C
IB
mV
mV
Vdc
mA
Quiescent Current Change
21 ≤ Vin ≤ 33 Vdc, IO = 500 mA
5.0 mA ≤ IO ≤ 1.0 A, Vin = 27 V
21 ≤ Vin ≤ 33 Vdc, IO = 1.0 A
∆IB
Ripple Rejection
IO = 1.0 mA (TJ = +25°C)
RR
53
69
–
dB
Dropout Voltage
mA
VI – VO
–
1.7
–
Vdc
Output Resistance (f = 1.0 kHz)
rO
–
2.0
–
mΩ
Short Circuit Current Limit (TJ = +25°C)
ISC
–
500
–
A
Output Noise Voltage (TA = +25°C)
10 Hz ≤ f ≤ 100 kHz
Vn
–
110
–
µV
TCVO
–
±2.3
–
mV/°C
IO
–
2.4
–
A
21
–
–
Vdc
Average Temperature Coefficient of Output Voltage
IO = 5.0 mA
Peak Output Current (TJ = +25°C)
Input Voltage to Maintain Line Regulation (TJ = +25°C)
IO = 1.0 A
NOTE: 1. Tlow to Thigh = 0° to +125°C
MOTOROLA ANALOG IC DEVICE DATA
11
LM340, A Series
LM340–24
ELECTRICAL CHARACTERISTICS (Vin = 33 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)
Characteristics
Output Voltage (TJ = +25°C)
IO = 5.0 mA to 1.0 A
Symbol
Min
Typ
Max
Unit
VO
23
24
25
Vdc
–
–
–
–
–
–
–
–
240
240
120
240
–
–
–
–
–
–
240
240
120
22.8
–
25.2
–
–
–
4.0
8.5
8.0
–
–
–
–
–
–
1.0
0.5
1.0
Line Regulation
28 Vdc to 38 Vdc
27 Vdc to 38 Vdc (TJ = +25°C)
30 Vdc to 36 Vdc, IO = 1.0 A
27.1 Vdc to 38 Vdc, IO = 1.0 A (TJ = +25°C)
Regline
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
Output Voltage
27 ≤ Vin ≤ 38 Vdc, 5.0 mA ≤ IO ≤ 1.0 A, PD ≤ 15 W
VO
Quiescent Current
IO = 1.0 A
TJ = +25°C
IB
mV
mV
Vdc
mA
Quiescent Current Change
27 ≤ Vin ≤ 38 Vdc, IO = 500 mA
5.0 mA ≤ IO ≤ 1.0 A, Vin = 33 V
27.3 ≤ Vin ≤ 38 Vdc, IO = 1.0 A
∆IB
Ripple Rejection
IO = 1.0 mA (TJ = +25°C)
RR
50
66
–
dB
Dropout Voltage
mA
VI – VO
–
1.7
–
Vdc
Output Resistance (f = 1.0 kHz)
rO
–
2.0
–
mΩ
Short Circuit Current Limit (TJ = +25°C)
ISC
–
200
–
A
Output Noise Voltage (TA = +25°C)
10 Hz ≤ f ≤ 100 kHz
Vn
–
170
–
µV
TCVO
–
±3.0
–
mV/°C
IO
–
2.4
–
A
27.1
–
–
Vdc
Average Temperature Coefficient of Output Voltage
IO = 5.0 mA
Peak Output Current (TJ = +25°C)
Input Voltage to Maintain Line Regulation (TJ = +25°C)
IO = 1.0 A
NOTE: 1. Tlow to Thigh = 0° to +125°C
12
MOTOROLA ANALOG IC DEVICE DATA
LM340, A Series
VOLTAGE REGULATOR PERFORMANCE
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.
The performance of a voltage regulator is specified by its
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
2
2
1
∆ Vout , OUTPUT
VOLTAGE DEVIATION (V)
(2.0 mV/DIV)
Figure 2. Load and Thermal Regulation
2
1
2
18 V
Iout , OUTPUT
CURRENT (A)
∆ Vout , OUTPUT
Vin , INPUT VOLTAGE DEVIATION (V)
VOLTAGE (V)
(2.0 mV/DIV)
Figure 1. Line and Thermal Regulation
8.0 V
t, TIME (2.0 ms/DIV)
LM340AT–5.0
Vout = 5.0 V
1 = Regline = 2.4 mV
Vin = 8.0 V → 18 V → 8.0 V
2 = Regtherm = 0.0030% VO/W
Iout = 1.0 A
2.0
0
t, TIME (2.0 ms/DIV)
LM340AT–5.0
Vout = 5.0 V
1 = Regline = 4.4 mV
Vin = 15 V
2 = Regtherm = 0.0020% VO/W
Iout = 0 A → 1.5 A → 0 A
Figure 3. Temperature Stability
Figure 4. Output Impedance
100
Z O , OUTPUT IMPEDANCE ( Ω )
NORMALIZED OUTPUT VOLTAGE
1.02
Vin – Vout = 5.0 V
Iout = 100 mA
1.01
1.00
0.99
0.98
–90
–50
–10
30
70
110
TJ, JUNCTION TEMPERATURE (°C)
MOTOROLA ANALOG IC DEVICE DATA
150
190
10–1
10–2
Vout = 5.0 V
Vin = 7.5 V
Iout = 1.0 A
CO = 0
TJ = 25°C
10–3
10–4
1.0
10
100
1.0 k
10 k 100 k
f, FREQUENCY (Hz)
1.0 M
10 M
100 M
13
LM340, A Series
Figure 5. Ripple Rejection versus Frequency
Figure 6. Ripple Rejection versus Output Current
100
Iout = 50 mA
RR, RIPPLE REJECTION (dB)
RR, RIPPLE REJECTION (dB)
100
80
Iout = 1.5 A
Vout = 5.0 V
Vin = 10 V
CO = 0
TJ = 25°C
60
40
80
Vout = 5.0 V
Vin = 10 V
Vin = 10 V
CO = 0
f = 120 Hz
TJ = 25°C
60
40
20
1.0
10
100
1.0 k
10 k
100 k
f, FREQUENCY (Hz)
1.0 M
10 M
30
0.01
100 M
Figure 7. Quiescent Current versus
Input Voltage
5.0
IB , QUIESCENT CURRENT (mA)
IB , QUIESCENT CURRENT (mA)
3.0
TJ = 25°C
Vout = 5.0 V
Iout = 1.0 A
2.0
1.0
0
0
10
20
30
Vin, INPUT VOLTAGE (Vdc)
4.0
3.0
TJ = 25°C
Vin – Vout = 5.0 V
2.0
1.0
0
0.01
40
Figure 9. Dropout Voltage
2.5
2.0
IO = 1.0 A
1.5
IO = 500 mA
IO = 10 mA
0.5
0
–75
3.0
2.0
1.0
0
–50
–25
0
25
50
75
TA, AMBIENT TEMPERATURE (°C)
10
4.0
∆Vout = 100 mV
1.0
0.1
1.0
Iout, OUTPUT CURRENT (A)
Figure 10. Peak Output Current
Iout , OUTPUT CURRENT (A)
V in –Vout , INPUT–OUTPUT VOLTAGE
DIFFERENTIAL (V)
10
Figure 8. Quiescent Current versus
Output Current
4.0
14
0.1
1.0
Iout, OUTPUT CURRENT (A)
100
125
TJ = 25°C
0
10
20
30
40
Vin–Vout, INPUT–OUTPUT VOLTAGE DIFFERENTIAL (V)
MOTOROLA ANALOG IC DEVICE DATA
Figure 12. Load Transient Response
∆ Vout , OUTPUT VOLTAGE
DEVIATION (V)
Figure 11. Line Transient Response
0.8
Vout = 5.0 V
Iout = 150 mA
CO = 0
TJ = 25°C
0.6
0.4
0.2
0
–0.2
–0.4
–0.6
Iout , OUTPUT
CURRENT (A)
∆ Vin , INPUT VOLTAGE
CHANGE (V)
∆ Vout , OUTPUT VOLTAGE
DEVIATION (V)
LM340, A Series
1.0
0.5
0
0
10
20
30
0.3
0.2
0.1
0
–0.1
Vout = 5.0 V
Vin = 10 V
CO = 0
TJ = 25°C
–0.2
–0.3
1.5
1.0
0.5
0
40
0
10
20
30
40
t, TIME (µs)
t, TIME (µs)
Figure 13. Worst Case Power Dissipation
versus Ambient Temperature (Case 221A)
PD , POWER DISSIPATION (W)
20
16
θHS = 5°C/W
12
θHS = 15°C/W
8.0
4.0
0
–50
θJC = 5°C/W
θJA = 65°C/W
TJ(max) = 150°C
θHS = 0°C/W
No Heatsink
–25
0
25
50
75
100
125
150
TA, AMBIENT TEMPERATURE (°C)
MOTOROLA ANALOG IC DEVICE DATA
15
LM340, A Series
APPLICATIONS INFORMATION
Design Considerations
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
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 14. Current Regulator
Figure 15. Adjustable Output Regulator
LM340–5.0
Input
Output
LM340–5.0
R
0.33µF
IO
Input
Constant
Current to
Grounded Load
7
–
0.33µF
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:
2
0.1µF
6
+
1k
3
10k
4
MC1741G
5.0 V
+ IQ
IO =
R
IQ
Vout, 7.0 V to 20 V
Vin – VO ≥ 2.0 V
^ 1.5 mA over line and load changes
For example, a 1 A current source would require R to be a 5 Ω,
10 W resistor and the output voltage compliance would be the input
voltage less 7.0 V.
The addition of an operational amplifier allows adjustment to higher or
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
Input
RSC
MJ2955
or Equiv.
Input
R
LM340
Output
2N6049
or Equiv.
R
LM340
1.0µF
Output
0.1µF
1.0µF
The LM340, A series can be current boosted with a PNP transistor. The
MJ2955 provides current to 5.0 A. Resistor R in conjuction with the VBE
of the PNP determines when the pass transistor begins conducting; this
circuit is not short circuit proof. Input–output differential voltage
minimum is increased by VBE of the pass transistor.
16
The circuit of Figure 17 can be modified to provide supply protection
against short circuits by adding a short circuit sense resistor, RSC, and
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.
MOTOROLA ANALOG IC DEVICE DATA
LM340, A Series
OUTLINE DIMENSIONS
T SUFFIX
PLASTIC PACKAGE
CASE 221A–06
ISSUE Y
–T–
B
C
F
T
S
SEATING
PLANE
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.
4
A
Q
1 2 3
U
H
K
Z
L
R
V
J
G
D
N
MOTOROLA ANALOG IC DEVICE DATA
DIM
A
B
C
D
F
G
H
J
K
L
N
Q
R
S
T
U
V
Z
INCHES
MIN
MAX
0.570
0.620
0.380
0.405
0.160
0.190
0.025
0.035
0.142
0.147
0.095
0.105
0.110
0.155
0.018
0.025
0.500
0.562
0.045
0.060
0.190
0.210
0.100
0.120
0.080
0.110
0.045
0.055
0.235
0.255
0.000
0.050
0.045
–––
–––
0.080
MILLIMETERS
MIN
MAX
14.48
15.75
9.66
10.28
4.07
4.82
0.64
0.88
3.61
3.73
2.42
2.66
2.80
3.93
0.46
0.64
12.70
14.27
1.15
1.52
4.83
5.33
2.54
3.04
2.04
2.79
1.15
1.39
5.97
6.47
0.00
1.27
1.15
–––
–––
2.04
17
LM340, A Series
NOTES
18
MOTOROLA ANALOG IC DEVICE DATA
LM340, A Series
NOTES
MOTOROLA ANALOG IC DEVICE DATA
19
LM340, A Series
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20
◊
*LM340/D*
MOTOROLA ANALOG IC DEVICE
DATA
LM340/D
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