SEMICONDUCTOR
TECHNICAL DATA
THREE–TERMINAL
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
12
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.
*C
in 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.
LM340–XX
Input
Cin*
0.33
µ
FCO**
Output
1
MOTOROLA ANALOG IC DEVICE DATA
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
•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
ORDERING INFORMATION
Device Output Voltage
and Tolerance Operating
Temperature Range Package
LM340T–5.0 5.0 V ± 4%
T 0 12 C
Pl i P
LM340AT–5.0 5.0 V ± 2%
T 0 12 C
Pl i P
LM340T–6.0 6.0 V ± 4%
T 0 12 C
Pl i P
LM340T–8.0 8.0 V ± 4%
T 0 12 C
Pl i P
LM340T–12 12 V ± 4%
TJ=0
°
to +125
°
C
Plastic Power
LM340AT–12 12 V ± 2%
T
J =
0°
t
o +
125°C
Pl
as
ti
c
P
ower
LM340T–15 15 V ± 4%
LM340AT–15 15 V ± 2%
LM340T–18 18 V ± 4%
LM340T–24 24 V ± 4%
* 2% regulators are available in 5, 12 and 15 V devices.
Motorola, Inc. 1996 Rev 1
LM340, A Series
2MOTOROLA 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, Junction–to–Air
TC= +25°C
Derate above TC = +75°C (See Figure 1)
Thermal Resistance, Junction–to–Case
PD
1/θJA
θJA
PD
1/θJA
θJC
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 TJ0 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
3.9k2.0k
6.0k
1.0k
LM340, A Series
3
MOTOROLA ANALOG IC DEVICE DATA
LM340–5.0
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 VO4.8 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 VO4.75 – 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 – 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
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
4MOTOROLA ANALOG IC DEVICE DATA
LM340A–5.0
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 VO4.9 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 VO4.8 – 5.2 Vdc
Quiescent Current
TJ = +25°CIB–
––
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 – 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
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
LM340–6.0
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 VO5.75 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 VO5.7 – 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 – 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
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
LM340, A Series
6MOTOROLA ANALOG IC DEVICE DATA
LM340–8.0
ELECTRICAL CHARACTERISTICS (Vin = 14 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 VO7.7 8.0 8.3 Vdc
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 –
–
–
–
–
–
–
–
80
80
40
80
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 –
–
–
–
–
–
80
80
40
mV
Output Voltage
10.5 ≤ Vin ≤ 23 Vdc, 5.0 mA ≤ IO ≤ 1.0 A, PD ≤ 15 W VO7.6 – 8.4 Vdc
Quiescent Current
IO = 1.0 A
TJ = +25°C
IB–
––
4.0 8.5
8.0
mA
Quiescent Current Change
10.5 ≤ Vin ≤ 25 Vdc, IO = 500 mA
5.0 mA ≤ IO ≤ 1.0 A, Vin = 14 V
10.6 ≤ V in ≤ 23 Vdc, IO = 1.0 A
∆IB–
–
–
–
–
–
1.0
0.5
1.0
mA
Ripple Rejection
IO = 1.0 A (TJ = +25°C) RR 56 76 – dB
Dropout Voltage 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
Average Temperature Coefficient of Output Voltage
IO = 5.0 mA TCVO–±1.0 – 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 10.5 – – Vdc
NOTE: 1. Tlow to Thigh = 0° to +125°C
LM340, A Series
7
MOTOROLA ANALOG IC DEVICE DATA
LM340–12
ELECTRICAL CHARACTERISTICS (Vin = 19 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 VO11.5 12 12.5 Vdc
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 –
–
–
–
–
–
–
–
120
120
60
120
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 –
–
–
–
–
–
120
120
60
mV
Output Voltage
14.5 ≤ Vin ≤ 27 Vdc, 5.0 mA ≤ IO ≤ 1.0 A, PD ≤ 15 W VO11.4 – 12.6 Vdc
Quiescent Current
IO = 1.0 A
TJ = +25°C
IB–
––
4.0 8.5
8.0
mA
Quiescent Current Change
14.5 ≤ Vin ≤ 30 Vdc, IO = 500 mA
5.0 mA ≤ IO ≤ 1.0 A, Vin = 19 V
14.8 ≤ V in ≤ 27 Vdc, IO = 1.0 A
∆IB–
–
–
–
–
–
1.0
0.5
1.0
mA
Ripple Rejection
IO = 1.0 A (TJ = +25°C) RR 55 72 – dB
Dropout Voltage 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
Average Temperature Coefficient of Output Voltage
IO = 5.0 mA TCVO–±1.5 – 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 14.6 – – 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.
LM340, A Series
8MOTOROLA ANALOG IC DEVICE DATA
LM340A–12
ELECTRICAL CHARACTERISTICS (Vin = 19 V, IO = 1.0 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 VO11.75 12 12.25 Vdc
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 –
–
–
–
–
4.0
–
–
18
18
30
9.0
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 –
–
–
–
–
–
60
32
19
mV
Output Voltage
14.8 ≤ Vin ≤ 27 Vdc, 5.0 mA ≤ IO ≤ 1.0 A, PD ≤ 15 W VO11.5 – 12.5 Vdc
Quiescent Current
TJ = +25°CIB–
––
3.5 6.5
6.0 mA
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–
–
–
–
–
–
0.5
0.8
0.8
mA
Ripple Rejection
15 ≤ Vin ≤ 25 Vdc, f = 120 Hz
IO = 500 mA
IO = 1.0 A (TJ = +25°C)
RR
61
61 –
72 –
–
dB
Dropout Voltage 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
Average Temperature Coefficient of Output Voltage
IO = 5.0 mA TCVO–±1.5 – mV/°C
Peak Output Current (TJ = +25°C) IO– 2.4 – A
Input Voltage to Maintain Line Regulation (TJ = +25°C) 14.5 – – Vdc
NOTE: 1. Tlow to Thigh = 0° to +125°C
LM340, A Series
9
MOTOROLA ANALOG IC DEVICE DATA
LM340–15
ELECTRICAL CHARACTERISTICS (Vin = 23 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 VO14.4 15 15.6 Vdc
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 –
–
–
–
–
–
–
–
150
150
75
150
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 –
–
–
–
–
–
150
150
75
mV
Output Voltage
17.5 ≤ Vin ≤ 30 Vdc, 5.0 mA ≤ IO ≤ 1.0 A, PD ≤ 15 W VO14.25 – 15.75 Vdc
Quiescent Current
IO = 1.0 A
TJ = +25°C
IB–
––
4.0 8.5
8.0
mA
Quiescent Current Change
17.5 ≤ Vin ≤ 30 Vdc, IO = 500 mA
5.0 mA ≤ IO ≤ 1.0 A, Vin = 23 V
17.9 ≤ V in ≤ 30 Vdc, IO = 1.0 A
∆IB–
–
–
–
–
–
1.0
0.5
1.0
mA
Ripple Rejection
IO = 1.0 mA (TJ = +25°C) RR 54 70 – dB
Dropout Voltage 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
Average Temperature Coefficient of Output Voltage
IO = 5.0 mA TCVO–±1.8 – 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 17.7 – – 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.
LM340, A Series
10 MOTOROLA ANALOG IC DEVICE DATA
LM340A–15
ELECTRICAL CHARACTERISTICS (Vin = 23 V, IO = 1.0 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 VO14.7 15 15.3 Vdc
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 –
–
–
–
–
4.0
–
–
22
22
30
10
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 –
–
–
–
12
–
75
35
21
mV
Output Voltage
17.9 ≤ Vin ≤ 30 Vdc, 5.0 mA ≤ IO ≤ 1.0 A, PD ≤ 15 W VO14.4 – 15.6 Vdc
Quiescent Current
TJ = +25°CIB–
––
3.5 6.5
6.0 mA
Quiescent Current Change
5.0 mA ≤ IO ≤ 1.0 A, Vin = 23 V
17.9 ≤ V in ≤ 30 Vdc, IO = 500 mA
17.9 ≤ Vin ≤ 30 Vdc, IO = 1.0 A (TJ = +25°C)
∆IB–
–
–
–
–
–
0.5
0.8
0.8
mA
Ripple Rejection
18.5 ≤ Vin ≤ 28.5 Vdc, f = 120 Hz
IO = 500 mA
IO = 1.0 A (TJ = +25°C)
RR
60
60 –
70 –
–
dB
Dropout Voltage 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
Average Temperature Coefficient of Output Voltage
IO = 5.0 mA TCVO–±1.8 – mV/°C
Peak Output Current (TJ = +25°C) IO– 2.4 – A
Input Voltage to Maintain Line Regulation (TJ = +25°C) 17.5 – – Vdc
NOTE: 1. Tlow to Thigh = 0° to +125°C
LM340, A Series
11
MOTOROLA ANALOG IC DEVICE DATA
LM340–18
ELECTRICAL CHARACTERISTICS (Vin = 27 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 VO17.3 18 18.7 Vdc
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 –
–
–
–
–
–
–
–
180
180
90
180
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 –
–
–
–
–
–
180
180
90
mV
Output Voltage
21 ≤ Vin ≤ 33 Vdc, 5.0 mA ≤ IO ≤ 1.0 A, PD ≤ 15 W VO17.1 – 18.9 Vdc
Quiescent Current
IO = 1.0 A
TJ = +25°C
IB–
––
4.0 8.5
8.0
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–
–
–
–
–
–
1.0
0.5
1.0
mA
Ripple Rejection
IO = 1.0 mA (TJ = +25°C) RR 53 69 – dB
Dropout Voltage 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
Average Temperature Coefficient of Output Voltage
IO = 5.0 mA TCVO–±2.3 – 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 21 – – Vdc
NOTE: 1. Tlow to Thigh = 0° to +125°C
LM340, A Series
12 MOTOROLA ANALOG IC DEVICE DATA
LM340–24
ELECTRICAL CHARACTERISTICS (Vin = 33 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 VO23 24 25 Vdc
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 –
–
–
–
–
–
–
–
240
240
120
240
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 –
–
–
–
–
–
240
240
120
mV
Output Voltage
27 ≤ Vin ≤ 38 Vdc, 5.0 mA ≤ IO ≤ 1.0 A, PD ≤ 15 W VO22.8 – 25.2 Vdc
Quiescent Current
IO = 1.0 A
TJ = +25°C
IB–
––
4.0 8.5
8.0
mA
Quiescent Current Change
27 ≤ Vin ≤ 38 Vdc, IO = 500 mA
5.0 mA ≤ IO ≤ 1.0 A, Vin = 33 V
27.3 ≤ V in ≤ 38 Vdc, IO = 1.0 A
∆IB–
–
–
–
–
–
1.0
0.5
1.0
mA
Ripple Rejection
IO = 1.0 mA (TJ = +25°C) RR 50 66 – dB
Dropout Voltage 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
Average Temperature Coefficient of Output Voltage
IO = 5.0 mATCVO–±3.0 – 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 27.1 – – Vdc
NOTE: 1. Tlow to Thigh = 0° to +125°C
LM340, A Series
13
MOTOROLA ANALOG IC DEVICE DATA
VOLTAGE REGULATOR PERFORMANCE
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
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 LM340A T–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.
2
1
2
1
Vout, OUTPUT
∆
Iout, OUTPUT
Vout , OUTPUT
∆
Vin, INPUT
Vout = 5.0 V
Vin = 7.5 V
Iout = 1.0 A
CO = 0
TJ = 25
°
C
Vin – Vout = 5.0 V
Iout = 100 mA
Figure 1. Line and Thermal Regulation Figure 2. Load and Thermal Regulation
LM340AT–5.0
Vout = 5.0 V
Vin = 15 V
Iout = 0 A
→
1.5 A
→
0 A = Regline = 4.4 mV
t, TIME (2.0 ms/DIV)
CURRENT (A) VOLT AGE DEVIATION (V)
(2.0 mV/DIV)
1
2
2.0
0
LM340AT–5.0
Vout = 5.0 V
Vin = 8.0 V
→
18 V
→
8.0 V
Iout = 1.0 A = Regline = 2.4 mV
t, TIME (2.0 ms/DIV)
VOLTAGE (V) VOLTAGE DEVIATION (V)
(2.0 mV/DIV)
1
2
18 V
8.0 V
2
2
Figure 3. Temperature Stability Figure 4. Output Impedance
1.02
1.00
0.98
–90 –50 –10 30 70 110 150 190
TJ, JUNCTION TEMPERATURE (
°
C)
NORMALIZED OUTPUT VOLT AGE
100
10–1
10–2
10–3
10–41.0 10 100 1.0 k 10 k 100 k 1.0 M 10 M 100 M
f, FREQUENCY (Hz)
1.01
0.99
= Regtherm = 0.0030% VO/W = Regtherm = 0.0020% VO/W
ZO
Ω
, OUTPUT IMPEDANCE ( )
LM340, A Series
14 MOTOROLA ANALOG IC DEVICE DATA
Iout, OUTPUT CURRENT (A)
Vin–Vout, INPUT–OUTPUT VOLTAGE
DIFFERENTIAL (V) IB, QUIESCENT CURRENT (mA)
IB, QUIESCENT CURRENT (mA)
Vout = 5.0 V
Vin = 10 V
Vin = 10 V
CO = 0
f = 120 Hz
TJ = 25
°
C
Iout = 1.5 A
Vout = 5.0 V
Vin = 10 V
CO = 0
TJ = 25
°
C
Figure 5. Ripple Rejection versus Frequency Figure 6. Ripple Rejection versus Output Current
Figure 7. Quiescent Current versus
Input Voltage Figure 8. Quiescent Current versus
Output Current
Figure 9. Dropout Voltage Figure 10. Peak Output Current
100
80
60
40
201.0 10 100 1.0 k 10 k 100 k 1.0 M 10 M 100 M
f, FREQUENCY (Hz)
RR, RIPPLE REJECTION (dB)
Iout = 50 mA
4.0
3.0
2.0
1.0
0010 203040
V
in, INPUT VOLTAGE (Vdc)
5.0
4.0
3.0
2.0
1.0
0
0.01 0.1 1.0 10
Iout, OUTPUT CURRENT (A)
100
80
60
40
30
0.01 0.1 1.0 10
Iout, OUTPUT CURRENT (A)
RR, RIPPLE REJECTION (dB)
TJ = 25
°
C
Vout = 5.0 V
Iout = 1.0 A
TJ = 25
°
C
Vin – Vout = 5.0 V
2.5
2.0
1.5
1.0
0.5
0–75 –50 –25 0 25 50 75 100 125
TA, AMBIENT TEMPERATURE (
°
C)
∆
Vout = 100 mV
IO = 1.0 A
IO = 500 mA
IO = 10 mA
4.0
3.0
2.0
1.0
00 10203040
V
in–Vout, INPUT–OUTPUT VOLTAGE DIFFERENTIAL (V)
TJ = 25
°
C
LM340, A Series
15
MOTOROLA ANALOG IC DEVICE DATA
Vout, OUTPUT VOLTAGE
∆
DEVIATION (V)
Iout, OUTPUT
Vout, OUTPUT VOLT AGE
∆
DEVIATION (V)
Vin, INPUT VOLT AGE
∆
CHANGE (V)
–0.1
Figure 11. Line Transient Response Figure 12. Load Transient Response
Figure 13. Worst Case Power Dissipation
versus Ambient Temperature (Case 221A)
010203040
0.8
0.6
0.4
0.2
0
–0.2
–0.4
–0.6
1.0
0.5
0
t, TIME (
µ
s)
Vout = 5.0 V
Iout = 150 mA
CO = 0
TJ = 25
°
C
1.0
CURRENT (A)
010203040
t, TIME (
µ
s)
Vout = 5.0 V
Vin = 10 V
CO = 0
TJ = 25
°
C
0.3
0.2
0.1
0
–0.2
–0.3
1.5
0.5
0
20
16
12
8.0
4.0
0
–50 –25 0 25 50 75 100 125 150
TA, AMBIENT TEMPERATURE (
°
C)
, POWER DISSIPATION (W)
D
P
θ
JC = 5
°
C/W
θ
JA = 65
°
C/W
TJ(max) = 150
°
C
θ
HS = 0
°
C/W
θ
HS = 5
°
C/W
θ
HS = 15
°
C/W
No Heatsink
LM340, A Series
16 MOTOROLA ANALOG IC DEVICE DATA
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
Figure 16. Current Boost Regulator Figure 17. Short Circuit Protection
5.0 V
R
Input
0.33
µ
F
LM340–5.0
R
IO
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:
IO = + IQ
IQ
^
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.
Constant
Current to
Grounded Load
Input
Output
1k 4
6
72
3
–
+
0.1
µ
F
10k
MC1741G
Vout, 7.0 V to 20 V
Vin – VO
≥
2.0 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.
0.33
µ
F
R
0.1
µ
F
Output
1.0
µ
F
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.
MJ2955 or Equiv
LM340
LM340
Input RSC
MJ2955
or Equiv.
Output
R
2N6049
or Equiv.
1.0
µ
F
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.
LM340–5.0
Input
LM340, A Series
17
MOTOROLA ANALOG IC DEVICE DATA
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.
DIM MIN MAX MIN MAX
MILLIMETERSINCHES
A0.570 0.620 14.48 15.75
B0.380 0.405 9.66 10.28
C0.160 0.190 4.07 4.82
D0.025 0.035 0.64 0.88
F0.142 0.147 3.61 3.73
G0.095 0.105 2.42 2.66
H0.110 0.155 2.80 3.93
J0.018 0.025 0.46 0.64
K0.500 0.562 12.70 14.27
L0.045 0.060 1.15 1.52
N0.190 0.210 4.83 5.33
Q0.100 0.120 2.54 3.04
R0.080 0.110 2.04 2.79
S0.045 0.055 1.15 1.39
T0.235 0.255 5.97 6.47
U0.000 0.050 0.00 1.27
V0.045 ––– 1.15 –––
Z––– 0.080 ––– 2.04
B
Q
H
Z
L
V
G
N
A
K
F
123
4
D
SEATING
PLANE
–T–
C
S
T
U
R
J
LM340, A Series
18 MOTOROLA ANALOG IC DEVICE DATA
NOTES
LM340, A Series
19
MOTOROLA ANALOG IC DEVICE DATA
NOTES
LM340, A Series
20 MOTOROLA ANALOG IC DEVICE DATA
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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
specifically disclaims any and all liability, including without limitation consequential or incidental damages. “Typical” parameters which may be provided in Motorola
data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals”
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LM340/D
*LM340/D*
◊
