SEMICONDUCTOR
TECHNICAL DATA
Order this document by MC7800/D
D2T SUFFIX
PLASTIC PACKAGE
CASE 936
(D2PAK)
THREE–TERMINAL
POSITIVE FIXED
VOLTAGE REGULATORS
STANDARD APPLICATION
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.
XX,
MC78XX
Input
Cin*
0.33
µ
FCO**
Output
Pin 1. Input
2. Ground
3. Output
T SUFFIX
PLASTIC PACKAGE
CASE 221A
Heatsink surface
connected to Pin 2.
Heatsink surface (shown as terminal 4 in
case outline drawing) is connected to Pin 2.
3
12
3
12
These two digits of the type number
indicate nominal 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. Values
of less than 0.1 µF could cause instability.
*
**
1
MOTOROLA ANALOG IC DEVICE DATA
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.
•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
•Available in Surface Mount D2PAK and Standard 3–Lead Transistor
Packages
•Previous Commercial Temperature Range has been Extended to a
Junction Temperature Range of –40°C to +125°C
DEVICE TYPE/NOMINAL OUTPUT VOLTAGE
MC7805AC
50V
MC7812C
12 V
LM340AT–5
50V
LM340T–12
12
V
MC7805C
5
.
0
V
MC7815AC
15 V
LM340T–5 LM340AT–15
15 V
MC7806AC
60V
MC7815C
15
V
MC7806C
6
.
0
V
LM340T–15
MC7808AC
80V
MC7818AC
18 V
MC7808C
8
.
0
V
MC7818C
18
V
MC7809C 9.0 V MC7824AC
24 V
MC7812AC
12 V
MC7824C
24
V
LM340AT–12
12
V
ORDERING INFORMATION
Device Output Voltage
Tolerance Operating
Temperature Range Package
MC78XXACT
2%
T40°125°C
Insertion Mount
LM340AT–XX 2%
T40°125°C
Insertion
Mount
MC78XXACD2T
TJ=
–
40
°
to +125
°
C
Surface Mount
MC78XXCT
4%
T
J = –
40°
to
+
125°C
Insertion Mount
LM340T–XX 4%
Insertion
Mount
MC78XXCD2T Surface Mount
XX indicates nominal voltage.
Motorola, Inc. 1997 Rev 5
MC7800, MC7800A, LM340, LM340A Series
2MOTOROLA ANALOG IC DEVICE DATA
MAXIMUM RATINGS (TA = 25°C, unless otherwise noted.)
Rating Symbol Value Unit
Input Voltage (5.0 – 18 V) VI35 Vdc
Input Voltage (24 V) 40
Power Dissipation
Case 221A
TA = 25°C PDInternally Limited W
Thermal Resistance, Junction–to–Ambient RθJA 65 °C/W
Thermal Resistance, Junction–to–Case RθJC 5.0 °C/W
Case 936 (D2PAK)
TA = 25°C PDInternally Limited W
Thermal Resistance, Junction–to–Ambient RθJA See Figure 13 °C/W
Thermal Resistance, Junction–to–Case RθJA 5.0 °C/W
Storage Junction Temperature Range Tstg –65 to +150 °C
Operating Junction Temperature TJ+150 °C
NOTE: ESD data available upon request.
R15
680
R18
100 k
D1
Zener R1
10.66 k
R2
1.56 k
R17
9.0 k
Q7
QNPN
LAT
Q17
Q9
QNPN 2
Q8
QNPN
Q14
QNPN
Q6
QNPN
Q5
QNPN 2
LAT 3 A
Q18
R5
4.5 k
R6
1.0 k
Q13
QNPN Q2
QNPN 4
SUB
Q11 2
R11
15 k
QNPN 6
Q1
R7
14 k R3
1.8 k R8
5.0 k
Diode
Q16
Q4
QNPN
N+ C1
30 P
C2
3.0 P
R9
3.0 k
R16
600
R20
17500
Q15
QNPN
Q10
QNPN
R22
100
Q12
QNPN
R24
50
1.0 P
R21
600 R23
0.2
R19
27.5 k
D2
Zener
Q19
QNPN
R14
1.0 k
Q20
QNPN
R28
9.0 k
R27
9.0 k
R29
9.0 k
R25
6.0 k
R26
3.0 k
R12
3.0 k
R10
3340–(3316ACT)
R30
18 k Sense
Vout
5.01
Vin
R13
11660
Q3
QNPN
MC7800
C3
Representative Schematic Diagram
This device contains 22 active transistors.
MC7800, MC7800A, LM340, LM340A Series
3
MOTOROLA ANALOG IC DEVICE DATA
ELECTRICAL CHARACTERISTICS (Vin = 10 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)
MC7805C/LM340T–5
Characteristic Symbol Min Typ Max Unit
Output Voltage (TJ = 25°C) VO4.8 5.0 5.2 Vdc
Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PD ≤15 W) VOVdc
7.0 Vdc ≤ Vin ≤ 20 Vdc 4.75 5.0 5.25
8.0 Vdc ≤ Vin ≤ 20 Vdc – – –
Line Regulation (Note 2) Regline mV
7.5 Vdc ≤ Vin ≤ 20 Vdc, 1.0 A – 0.5 20
8.0 Vdc ≤ Vin ≤ 12 Vdc – 0.8 10
Load Regulation (Note 2) Regload mV
5.0 mA ≤ IO ≤ 1.0 A – 1.3 25
5.0 mA ≤ IO ≤ 1.5 A (TA = 25°C) - 1.3 25
Quiescent Current IB– 3.2 6.5 mA
Quiescent Current Change ∆IBmA
7.0 Vdc ≤ Vin ≤ 25 Vdc – 0.3 1.0
5.0 mA ≤ IO ≤ 1.0 A (TA = 25°C) – 0.08 0.8
Ripple Rejection RR 62 83 – dB
8.0 Vdc ≤ Vin ≤ 18 Vdc, f = 120 Hz
Dropout Voltage (IO = 1.0 A, TJ = 25°C) VI – VO–2.0 – Vdc
Output Noise Voltage (TA = 25°C) Vn– 10 – µV/VO
10 Hz ≤ f ≤ 100 kHz
Output Resistance f = 1.0 kHz rO– 0.9 – mΩ
Short Circuit Current Limit (TA = 25°C) ISC –0.6 – A
Vin = 35 Vdc
Peak Output Current (TJ = 25°C) Imax –2.2 – A
Average Temperature Coefficient of Output Voltage TCVO– –0.3 – mV/°C
ELECTRICAL CHARACTERISTICS (Vin = 10 V, IO = 1.0 A, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)
MC7805AC/LM340AT–5
Characteristic Symbol Min Typ Max Unit
Output Voltage (TJ = 25°C) VO4.9 5.0 5.1 Vdc
Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PD ≤15 W) VO4.8 5.0 5.2 Vdc
7.5 Vdc ≤ Vin ≤ 20 Vdc
Line Regulation (Note 2) Regline mV
7.5 Vdc ≤ Vin ≤ 25 Vdc, IO = 500 mA – 0.5 10
8.0 Vdc ≤ Vin ≤ 12 Vdc, IO = 1.0 A – 0.8 12
8.0 Vdc ≤ Vin ≤ 12 Vdc, IO = 1.0 A, TJ = 25°C – 1.3 4.0
7.3 Vdc ≤ Vin ≤ 20 Vdc, IO = 1.0 A, TJ = 25°C – 4.5 10
Load Regulation (Note 2) Regload mV
5.0 mA ≤ IO ≤ 1.5 A, TJ = 25°C – 1.3 25
5.0 mA ≤ IO ≤ 1.0 A – 0.8 25
250 mA ≤ IO ≤ 750 mA – 0.53 15
Quiescent Current IB– 3.2 6.0 mA
Quiescent Current Change ∆IBmA
8.0 Vdc ≤ Vin ≤ 25 Vdc, IO = 500 mA – 0.3 0.8
7.5 Vdc ≤ Vin ≤ 20 Vdc, TJ = 25°C – – 0.8
5.0 mA ≤ IO ≤ 1.0 A – 0.08 0.5
Ripple Rejection RR 68 83 – dB
8.0 Vdc ≤ Vin ≤ 18 Vdc, f = 120 Hz, IO = 500 mA
Dropout Voltage (IO = 1.0 A, TJ = 25°C) VI – VO–2.0 – Vdc
NOTES: 1.Tlow = –40°C for MC78XXAC, C, LM340AT–XX, LM340T–XX Thigh = +125°C for MC78XXAC, C, LM340AT–XX, LM340T–XX
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.
MC7800, MC7800A, LM340, LM340A Series
4MOTOROLA ANALOG IC DEVICE DATA
ELECTRICAL CHARACTERISTICS (continued) (Vin = 10 V, IO = 1.0 A, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)
MC7805AC/LM340AT–5
Characteristic Symbol Min Typ Max Unit
Output Noise Voltage (TA = 25°C) Vn– 10 – µV/VO
10 Hz ≤ f ≤ 100 kHz
Output Resistance (f = 1.0 kHz) rO– 0.9 – mΩ
Short Circuit Current Limit (TA = 25°C) ISC –0.2 – A
Vin = 35 Vdc
Peak Output Current (TJ = 25°C) Imax –2.2 – A
Average Temperature Coefficient of Output Voltage TCVO– –0.3 – mV/°C
NOTES: 1.Tlow = –40°C for MC78XXAC, C, LM340AT–XX, LM340T–XX Thigh = +125°C for MC78XXAC, C, LM340AT–XX, LM340T–XX
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.
ELECTRICAL CHARACTERISTICS (Vin = 11 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)
MC7806C
Characteristic Symbol Min Typ Max Unit
Output Voltage (TJ = 25°C) VO5.75 6.0 6.25 Vdc
Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PD ≤15 W) VOVdc
8.0 Vdc ≤ Vin ≤ 21 Vdc 5.7 6.0 6.3
9.0 Vdc ≤ Vin ≤ 21 Vdc – – –
Line Regulation, TJ = 25°C (Note 2) Regline mV
8.0 Vdc ≤ Vin ≤ 25 Vdc – 0.5 24
9.0 Vdc ≤ Vin ≤ 13 Vdc – 0.8 12
Load Regulation, TJ = 25°C (Note 2) Regload –1.3 30 mV
5.0 mA ≤ IO ≤ 1.5 A
Quiescent Current (TJ = 25°C) IB– 3.3 8.0 mA
Quiescent Current Change ∆IBmA
8.0 Vdc ≤ Vin ≤ 25 Vdc – 0.3 1.3
5.0 mA ≤ IO ≤ 1.0 A – 0.08 0.5
Ripple Rejection RR 58 65 – dB
9.0 Vdc ≤ Vin ≤ 19 Vdc, f = 120 Hz
Dropout Voltage (IO = 1.0 A, TJ = 25°C) VI – VO–2.0 – Vdc
Output Noise Voltage (TA = 25°C) Vn– 10 – µV/VO
10 Hz ≤ f ≤ 100 kHz
Output Resistance f = 1.0 kHz rO– 0.9 – mΩ
Short Circuit Current Limit (TA = 25°C) ISC –0.2 – A
Vin = 35 Vdc
Peak Output Current (TJ = 25°C) Imax –2.2 – A
Average Temperature Coefficient of Output Voltage TCVO– –0.3 – mV/°C
NOTES: 1.Tlow = –40°C for MC78XXAC, C Thigh = +125°C for MC78XXAC, 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.
MC7800, MC7800A, LM340, LM340A Series
5
MOTOROLA ANALOG IC DEVICE DATA
ELECTRICAL CHARACTERISTICS (Vin = 11 V, IO = 1.0 A, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)
MC7806AC
Characteristic Symbol Min Typ Max Unit
Output Voltage (TJ = 25°C) VO5.88 6.0 6.12 Vdc
Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PD ≤15 W) VO5.76 6.0 6.24 Vdc
8.6 Vdc ≤ Vin ≤ 21 Vdc
Line Regulation (Note 2) Regline mV
8.6 Vdc ≤ Vin ≤ 25 Vdc, IO = 500 mA – 5.0 12
9.0 Vdc ≤ Vin ≤ 13 Vdc, IO = 1.0 A – 1.4 15
Load Regulation (Note 2) Regload mV
5.0 mA ≤ IO ≤ 1.5 A, TJ = 25°C – 1.3 25
5.0 mA ≤ IO ≤ 1.0 A – 0.9 25
250 mA ≤ IO ≤ 750 mA – 0.2 15
Quiescent Current IB– 3.3 6.0 mA
Quiescent Current Change ∆IBmA
9.0 Vdc ≤ Vin ≤ 25 Vdc, IO = 500 mA – – 0.8
9.0 Vdc ≤ Vin ≤ 21 Vdc, IO = 1.0 A, TJ = 25°C – – 0.8
5.0 mA ≤ IO ≤ 1.0 A – – 0.5
Ripple Rejection RR 58 65 – dB
9.0 Vdc ≤ Vin ≤ 19 Vdc, f = 120 Hz, IO = 500 mA
Dropout Voltage (IO = 1.0 A, TJ = 25°C) VI – VO–2.0 – Vdc
Output Noise Voltage (TA = 25°C) Vn– 10 – µV/VO
10 Hz ≤ f ≤ 100 kHz
Output Resistance (f = 1.0 kHz) rO– 0.9 – mΩ
Short Circuit Current Limit (TA = 25°C) ISC –0.2 – A
Vin = 35 Vdc
Peak Output Current (TJ = 25°C) Imax –2.2 – A
Average Temperature Coefficient of Output Voltage TCVO– –0.3 – mV/°C
ELECTRICAL CHARACTERISTICS (Vin = 14 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)
MC7808C
Characteristic Symbol Min Typ Max Unit
Output Voltage (TJ = 25°C) VO7.7 8.0 8.3 Vdc
Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PD ≤15 W) VO7.6 8.0 8.4 Vdc
10.5 Vdc ≤ Vin ≤ 23 Vdc
Line Regulation, TJ = 25°C, (Note 2) Regline mV
10.5 Vdc ≤ Vin ≤ 25 Vdc – 6.0 32
11 Vdc ≤ Vin ≤ 17 Vdc – 1.7 16
Load Regulation, TJ = 25°C (Note 2) Regload –1.4 35 mV
5.0 mA ≤ IO ≤ 1.5 A
Quiescent Current IB– 3.3 8.0 mA
Quiescent Current Change ∆IBmA
10.5 Vdc ≤ Vin ≤ 25 Vdc – – 1.0
5.0 mA ≤ IO ≤ 1.0 A – – 0.5
Ripple Rejection RR 56 62 – dB
11.5 Vdc ≤ Vin ≤ 18 Vdc, f = 120 Hz
Dropout Voltage (IO = 1.0 A, TJ = 25°C) VI – VO–2.0 – Vdc
Output Noise Voltage (TA = 25°C) Vn– 10 – µV/VO
10 Hz ≤ f ≤ 100 kHz
NOTES: 1.Tlow = –40°C for MC78XXAC, C Thigh = +125°C for MC78XXAC, 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.
MC7800, MC7800A, LM340, LM340A Series
6MOTOROLA ANALOG IC DEVICE DATA
ELECTRICAL CHARACTERISTICS (continued) (Vin = 14 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)
MC7808C
Characteristic Symbol Min Typ Max Unit
Output Resistance f = 1.0 kHz rO– 0.9 – mΩ
Short Circuit Current Limit (TA = 25°C) ISC –0.2 – A
Vin = 35 Vdc
Peak Output Current (TJ = 25°C) Imax –2.2 – A
Average Temperature Coefficient of Output Voltage TCVO– –0.4 – mV/°C
ELECTRICAL CHARACTERISTICS (Vin = 14 V, IO = 1.0 A, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)
MC7808AC
Characteristic Symbol Min Typ Max Unit
Output Voltage (TJ = 25°C) VO7.84 8.0 8.16 Vdc
Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PD ≤15 W) VO7.7 8.0 8.3 Vdc
10.6 Vdc ≤ Vin ≤ 23 Vdc
Line Regulation (Note 2) Regline mV
10.6 Vdc ≤ Vin ≤ 25 Vdc, IO = 500 mA – 6.0 15
11 Vdc ≤ Vin ≤ 17 Vdc, IO = 1.0 A – 1.7 18
10.4 Vdc ≤ Vin ≤ 23 Vdc, TJ = 25°C – 5.0 15
Load Regulation (Note 2) Regload mV
5.0 mA ≤ IO ≤ 1.5 A, TJ = 25°C – 1.4 25
5.0 mA ≤ IO ≤ 1.0 A – 1.0 25
250 mA ≤ IO ≤ 750 mA – 0.22 15
Quiescent Current IB– 3.3 6.0 mA
Quiescent Current Change ∆IBmA
11 Vdc ≤ Vin ≤ 25 Vdc, IO = 500 mA – – 0.8
10.6 Vdc ≤ Vin ≤ 23 Vdc, IO = 1.0 A, TJ = 25°C – – 0.8
5.0 mA ≤ IO ≤ 1.0 A – – 0.5
Ripple Rejection RR 56 62 – dB
11.5 Vdc ≤ Vin ≤ 21.5 Vdc, f = 120 Hz, IO = 500 mA
Dropout Voltage (IO = 1.0 A, TJ = 25°C) VI – VO–2.0 – Vdc
Output Noise Voltage (TA = 25°C) Vn– 10 – µV/VO
10 Hz ≤ f ≤ 100 kHz
Output Resistance f = 1.0 kHz rO– 0.9 – mΩ
Short Circuit Current Limit (TA = 25°C) ISC –0.2 – A
Vin = 35 Vdc
Peak Output Current (TJ = 25°C) Imax –2.2 – A
Average Temperature Coefficient of Output Voltage TCVO– –0.4 – mV/°C
NOTES: 1.Tlow = –40°C for MC78XXAC, C Thigh = +125°C for MC78XXAC, 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.
MC7800, MC7800A, LM340, LM340A Series
7
MOTOROLA ANALOG IC DEVICE DATA
ELECTRICAL CHARACTERISTICS (Vin = 15 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)
MC7809CT
Characteristic Symbol Min Typ Max Unit
Output Voltage (TJ = 25°C) VO8.65 9.0 9.35 Vdc
Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PD ≤15 W) VO8.55 9.0 9.45 Vdc
11.5 Vdc ≤ Vin ≤ 24 Vdc
Line Regulation, TJ = 25°C (Note 2) Regline mV
11 Vdc ≤ Vin ≤ 26 Vdc – 6.2 32
11.5 Vdc ≤ Vin ≤ 17 Vdc – 1.8 16
Load Regulation, TJ = 25°C (Note 2) Regload –1.5 35 mV
5.0 mA ≤ IO ≤ 1.5 A
Quiescent Current IB– 3.4 8.0 mA
Quiescent Current Change ∆IBmA
11.5 Vdc ≤ Vin ≤ 26 Vdc – – 1.0
5.0 mA ≤ IO ≤ 1.0 A – – 0.5
Ripple Rejection RR 56 61 – dB
11.5 Vdc ≤ Vin ≤ 21.5 Vdc, f = 120 Hz
Dropout Voltage (IO = 1.0 A, TJ = 25°C) VI – VO–2.0 – Vdc
Output Noise Voltage (TA = 25°C) Vn– 10 – µV/VO
10 Hz ≤ f ≤ 100 kHz
Output Resistance f = 1.0 kHz rO– 1.0 – mΩ
Short Circuit Current Limit (TA = 25°C) ISC –0.2 – A
Vin = 35 Vdc
Peak Output Current (TJ = 25°C) Imax –2.2 – A
Average Temperature Coefficient of Output Voltage TCVO– –0.5 – mV/°C
ELECTRICAL CHARACTERISTICS (Vin = 19 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)
MC7812C/LM340T–12
Characteristic Symbol Min Typ Max Unit
Output Voltage (TJ = 25°C) VO11.5 12 12.5 Vdc
Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PD ≤15 W) VO11.4 12 12.6 Vdc
14.5 Vdc ≤ Vin ≤ 27 Vdc
Line Regulation, TJ = 25°C (Note 2) Regline mV
14.5 Vdc ≤ Vin ≤ 30 Vdc – 3.8 24
16 Vdc ≤ Vin ≤ 22 Vdc – 0.3 24
14.8 Vdc ≤ Vin ≤ 27 Vdc, IO = 1.0 A – – 48
Load Regulation, TJ = 25°C (Note 2) Regload –8.1 60 mV
5.0 mA ≤ IO ≤ 1.5 A
Quiescent Current IB– 3.4 6.5 mA
Quiescent Current Change ∆IBmA
14.5 Vdc ≤ Vin ≤ 30 Vdc, IO = 1.0 A, TJ = 25°C – – 0.7
15 Vdc ≤ Vin ≤ 30 Vdc – – 0.8
5.0 mA ≤ IO ≤ 1.0 A – – 0.5
Ripple Rejection RR 55 60 – dB
15 Vdc ≤ Vin ≤ 25 Vdc, f = 120 Hz
Dropout Voltage (IO = 1.0 A, TJ = 25°C) VI – VO–2.0 – Vdc
NOTES: 1.Tlow = –40°C for MC78XXAC, C, LM340AT–XX, LM340T–XX Thigh = +125°C for MC78XXAC, C, LM340AT–XX, LM340T–XX
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.
MC7800, MC7800A, LM340, LM340A Series
8MOTOROLA ANALOG IC DEVICE DATA
ELECTRICAL CHARACTERISTICS (continued) (Vin = 19 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)
MC7812C/LM340T–12
Characteristic Symbol Min Typ Max Unit
Output Noise Voltage (TA = 25°C) Vn– 10 – µV/VO
10 Hz ≤ f ≤ 100 kHz
Output Resistance f = 1.0 kHz rO– 1.1 – mΩ
Short Circuit Current Limit (TA = 25°C) ISC –0.2 – A
Vin = 35 Vdc
Peak Output Current (TJ = 25°C) Imax –2.2 – A
Average Temperature Coefficient of Output Voltage TCVO– –0.8 – mV/°C
ELECTRICAL CHARACTERISTICS (Vin = 19 V, IO = 1.0 A, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)
MC7812AC/LM340AT–12
Characteristic Symbol Min Typ Max Unit
Output Voltage (TJ = 25°C) VO11.75 12 12.25 Vdc
Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PD ≤15 W) VO11.5 12 12.5 Vdc
14.8 Vdc ≤ Vin ≤ 27 Vdc
Line Regulation (Note 2) Regline mV
14.8 Vdc ≤ Vin ≤ 30 Vdc, IO = 500 mA – 3.8 18
16 Vdc ≤ Vin ≤ 22 Vdc, IO = 1.0 A – 2.2 20
14.5 Vdc ≤ Vin ≤ 27 Vdc, TJ = 25°C – 6.0 120
Load Regulation (Note 2) Regload mV
5.0 mA ≤ IO ≤ 1.5 A, TJ = 25°C – – 25
5.0 mA ≤ IO ≤ 1.0 A – – 25
Quiescent Current IB– 3.4 6.0 mA
Quiescent Current Change ∆IBmA
15 Vdc ≤ Vin ≤ 30 Vdc, IO = 500 mA – – 0.8
14.8 Vdc ≤ Vin ≤ 27 Vdc, TJ = 25°C – – 0.8
5.0 mA ≤ IO ≤ 1.0 A, TJ = 25°C – – 0.5
Ripple Rejection RR 55 60 – dB
15 Vdc ≤ Vin ≤ 25 Vdc, f = 120 Hz, IO = 500 mA
Dropout Voltage (IO = 1.0 A, TJ = 25°C) VI – VO–2.0 – Vdc
Output Noise Voltage (TA = 25°C) Vn– 10 – µV/VO
10 Hz ≤ f ≤ 100 kHz
Output Resistance (f = 1.0 kHz) rO– 1.1 – mΩ
Short Circuit Current Limit (TA = 25°C) ISC –0.2 – A
Vin = 35 Vdc
Peak Output Current (TJ = 25°C) Imax –2.2 – A
Average Temperature Coefficient of Output Voltage TCVO– –0.8 – mV/°C
NOTES: 1.Tlow = –40°C for MC78XXAC, C, LM340AT–XX, LM340T–XX Thigh = +125°C for MC78XXAC, C, LM340AT–XX, LM340T–XX
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.
MC7800, MC7800A, LM340, LM340A Series
9
MOTOROLA ANALOG IC DEVICE DATA
ELECTRICAL CHARACTERISTICS (Vin = 23 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)
MC7815C/LM340T–15
Characteristic Symbol Min Typ Max Unit
Output Voltage (TJ = 25°C) VO14.4 15 15.6 Vdc
Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PD ≤15 W) VO14.25 15 15.75 Vdc
17.5 Vdc ≤ Vin ≤ 30 Vdc
Line Regulation, TJ = 25°C (Note 2) Regline mV
17.9 Vdc ≤ Vin ≤ 30 Vdc – 8.5 30
20 Vdc ≤ Vin ≤ 26 Vdc – 3.0 28
Load Regulation, TJ = 25°C (Note 2) Regload –1.8 55 mV
5.0 mA ≤ IO ≤ 1.5 A
Quiescent Current IB– 3.5 6.5 mA
Quiescent Current Change ∆IBmA
17.5 Vdc ≤ Vin ≤ 30 Vdc – – 0.8
17.5 Vdc ≤ Vin ≤ 30 Vdc, IO = 1.0 A, TJ = 25°C – – 0.7
5.0 mA ≤ IO ≤ 1.0 A – – 0.5
Ripple Rejection RR 54 58 – dB
18.5 Vdc ≤ Vin ≤ 28.5 Vdc, f = 120 Hz
Dropout Voltage (IO = 1.0 A, TJ = 25°C) VI – VO–2.0 – Vdc
Output Noise Voltage (TA = 25°C) Vn– 10 – µV/VO
10 Hz ≤ f ≤ 100 kHz
Output Resistance f = 1.0 kHz rO– 1.2 – mΩ
Short Circuit Current Limit (TA = 25°C) ISC –0.2 – A
Vin = 35 Vdc
Peak Output Current (TJ = 25°C) Imax –2.2 – A
Average Temperature Coefficient of Output Voltage TCVO– –1.0 – mV/°C
ELECTRICAL CHARACTERISTICS (Vin = 23 V, IO = 1.0 A, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)
MC7815AC/LM340AT–15
Characteristic Symbol Min Typ Max Unit
Output Voltage (TJ = 25°C) VO14.7 15 15.3 Vdc
Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PD ≤15 W) VO14.4 15 15.6 Vdc
17.9 Vdc ≤ Vin ≤ 30 Vdc
Line Regulation (Note 2) Regline mV
17.9 Vdc ≤ Vin ≤ 30 Vdc, IO = 500 mA – 8.5 20
20 Vdc ≤ Vin ≤ 26 Vdc – 3.0 22
17.5 Vdc ≤ Vin ≤ 30 Vdc, IO = 1.0 A, TJ = 25°C – 7.0 20
Load Regulation (Note 2) Regload mV
5.0 mA ≤ IO ≤ 1.5 A, TJ = 25°C – 1.8 25
5.0 mA ≤ IO ≤ 1.0 A – 1.5 25
250 mA ≤ IO ≤ 750 mA – 1.2 15
Quiescent Current IB– 3.5 6.0 mA
Quiescent Current Change ∆IBmA
17.5 Vdc ≤ Vin ≤ 30 Vdc, IO = 500 mA – – 0.8
17.5 Vdc ≤ Vin ≤ 30 Vdc, IO = 1.0 A, TJ = 25°C – – 0.8
5.0 mA ≤ IO ≤ 1.0 A – – 0.5
NOTES: 1.Tlow = –40°C for MC78XXAC, C, LM340AT–XX, LM340T–XX Thigh = +125°C for MC78XXAC, C, LM340AT–XX, LM340T–XX
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.
MC7800, MC7800A, LM340, LM340A Series
10 MOTOROLA ANALOG IC DEVICE DATA
ELECTRICAL CHARACTERISTICS (continued) (Vin = 23 V, IO = 1.0 A, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)
MC7815AC/LM340AT–15
Characteristic Symbol Min Typ Max Unit
Ripple Rejection RR 60 80 – dB
18.5 Vdc ≤ Vin ≤ 28.5 Vdc, f = 120 Hz, IO = 500 mA
Dropout Voltage (IO = 1.0 A, TJ = 25°C) VI – VO–2.0 – Vdc
Output Noise Voltage (TA = 25°C) Vn– 10 – µV/VO
10 Hz ≤ f ≤ 100 kHz
Output Resistance f = 1.0 kHz rO– 1.2 – mΩ
Short Circuit Current Limit (TA = 25°C) ISC –0.2 – A
Vin = 35 Vdc
Peak Output Current (TJ = 25°C) Imax –2.2 – A
Average Temperature Coefficient of Output Voltage TCVO– –1.0 – mV/°C
ELECTRICAL CHARACTERISTICS (Vin = 27 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)
MC7818C
Characteristic Symbol Min Typ Max Unit
Output Voltage (TJ = 25°C) VO17.3 18 18.7 Vdc
Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PD ≤15 W) VO17.1 18 18.9 Vdc
21 Vdc ≤ Vin ≤ 33 Vdc
Line Regulation, (Note 2) Regline mV
21 Vdc ≤ Vin ≤ 33 Vdc – 9.5 50
24 Vdc ≤ Vin ≤ 30 Vdc – 3.2 25
Load Regulation, (Note 2) Regload –2.0 55 mV
5.0 mA ≤ IO ≤ 1.5 A
Quiescent Current IB– 3.5 6.5 mA
Quiescent Current Change ∆IBmA
21 Vdc ≤ Vin ≤ 33 Vdc – – 1.0
5.0 mA ≤ IO ≤ 1.0 A – – 0.5
Ripple Rejection RR 53 57 – dB
22 Vdc ≤ Vin ≤ 33 Vdc, f = 120 Hz
Dropout Voltage (IO = 1.0 A, TJ = 25°C) ViI – VO–2.0 – Vdc
Output Noise Voltage (TA = 25°C) Vn– 10 – µV/VO
10 Hz ≤ f ≤ 100 kHz
Output Resistance f = 1.0 kHz rO– 1.3 – mΩ
Short Circuit Current Limit (TA = 25°C) ISC –0.2 – A
Vin = 35 Vdc
Peak Output Current (TJ = 25°C) Imax –2.2 – A
Average Temperature Coefficient of Output Voltage TCVO– –1.5 – mV/°C
NOTES: 1.Tlow = –40°C for MC78XXAC, C Thigh = +125°C for MC78XXAC, 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.
MC7800, MC7800A, LM340, LM340A Series
11
MOTOROLA ANALOG IC DEVICE DATA
ELECTRICAL CHARACTERISTICS (Vin = 27 V, IO = 1.0 A, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)
MC7818AC
Characteristic Symbol Min Typ Max Unit
Output Voltage (TJ = 25°C) VO17.64 18 18.36 Vdc
Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PD ≤15 W) VO17.3 18 18.7 Vdc
21 Vdc ≤ Vin ≤ 33 Vdc
Line Regulation (Note 2) Regline mV
21 Vdc ≤ Vin ≤ 33 Vdc, IO = 500 mA – 9.5 22
24 Vdc ≤ Vin ≤ 30 Vdc, IO = 1.0 A – 3.2 25
24 Vdc ≤ Vin ≤ 30 Vdc, IO = 1.0 A, TJ = 25°C – 3.2 10.5
20.6 Vdc ≤ Vin ≤ 33 Vdc, IO = 1.0 A, TJ = 25°C – 8.0 22
Load Regulation (Note 2) Regload mV
5.0 mA ≤ IO ≤ 1.5 A, TJ = 25°C – 2.0 25
5.0 mA ≤ IO ≤ 1.0 A – 1.8 25
250 mA ≤ IO ≤ 750 mA – 1.5 15
Quiescent Current IB– 3.5 6.0 mA
Quiescent Current Change ∆IBmA
21 Vdc ≤ Vin ≤ 33 Vdc, IO = 500 mA – – 0.8
21.5 Vdc ≤ Vin ≤ 30 Vdc, TJ = 25°C – – 0.8
5.0 mA ≤ IO ≤ 1.0 A – – 0.5
Ripple Rejection RR 53 57 – dB
22 Vdc ≤ Vin ≤ 32 Vdc, f = 120 Hz, IO = 500 mA
Dropout Voltage (IO = 1.0 A, TJ = 25°C) VI – VO–2.0 – Vdc
Output Noise Voltage (TA = 25°C) Vn– 10 – µV/VO
10 Hz ≤ f ≤ 100 kHz
Output Resistance f = 1.0 kHz rO– 1.3 – mΩ
Short Circuit Current Limit (TA = 25°C) ISC –0.2 – A
Vin = 35 Vdc
Peak Output Current (TJ = 25°C) Imax –2.2 – A
Average Temperature Coefficient of Output Voltage TCVO– –1.5 – mV/°C
ELECTRICAL CHARACTERISTICS (Vin = 33 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)
MC7824C
Characteristic Symbol Min Typ Max Unit
Output Voltage (TJ = 25°C) VO23 24 25 Vdc
Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PD ≤15 W) VO22.8 24 25.2 Vdc
27 Vdc ≤ Vin ≤ 38 Vdc
Line Regulation, (Note 2) Regline mV
27 Vdc ≤ Vin ≤ 38 Vdc – 2.7 60
30 Vdc ≤ Vin ≤ 36 Vdc – 2.7 48
Load Regulation, (Note 2) Regload –4.4 65 mV
5.0 mA ≤ IO ≤ 1.5 A
Quiescent Current IB– 3.6 6.5 mA
Quiescent Current Change ∆IBmA
27 Vdc ≤ Vin ≤ 38 Vdc – – 1.0
5.0 mA ≤ IO ≤ 1.0 A – – 0.5
NOTES: 1.Tlow = –40°C for MC78XXAC, C Thigh = +125°C for MC78XXAC, 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.
MC7800, MC7800A, LM340, LM340A Series
12 MOTOROLA ANALOG IC DEVICE DATA
ELECTRICAL CHARACTERISTICS (continued) (Vin = 33 V, IO = 500 mA, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)
MC7824C
Characteristic Symbol Min Typ Max Unit
Ripple Rejection RR 50 54 – dB
28 Vdc ≤ Vin ≤ 38 Vdc, f = 120 Hz
Dropout Voltage (IO = 1.0 A, TJ = 25°C) VI – VO–2.0 – Vdc
Output Noise Voltage (TA = 25°C) Vn– 10 – µV/VO
10 Hz ≤ f ≤ 100 kHz
Output Resistance f = 1.0 kHz rO– 1.4 – mΩ
Short Circuit Current Limit (TA = 25°C) ISC –0.2 – A
Vin = 35 Vdc
Peak Output Current (TJ = 25°C) Imax –2.2 – A
Average Temperature Coefficient of Output Voltage TCVO– –2.0 – mV/°C
ELECTRICAL CHARACTERISTICS (Vin = 33 V, IO = 1.0 A, TJ = Tlow to Thigh [Note 1], unless otherwise noted.)
MC7824AC
Characteristic Symbol Min Typ Max Unit
Output Voltage (TJ = 25°C) VO23.5 24 24.5 Vdc
Output Voltage (5.0 mA ≤ IO ≤ 1.0 A, PD ≤15 W) VO23.2 24 25.8 Vdc
27.3 Vdc ≤ Vin ≤ 38 Vdc
Line Regulation (Note 2) Regline mV
27 Vdc ≤ Vin ≤ 38 Vdc, IO = 500 mA – 11.5 25
30 Vdc ≤ Vin ≤ 36 Vdc, IO = 1.0 A – 3.8 28
30 Vdc ≤ Vin ≤ 36 Vdc, TJ = 25°C – 3.8 12
26.7 Vdc ≤ Vin ≤ 38 Vdc, IO = 1.0 A, TJ = 25°C – 10 25
Load Regulation (Note 2) Regload mV
5.0 mA ≤ IO ≤ 1.5 A, TJ = 25°C – 2.1 15
5.0 mA ≤ IO ≤ 1.0 A – 2.0 25
250 mA ≤ IO ≤ 750 mA – 1.8 15
Quiescent Current IB– 3.6 6.0 mA
Quiescent Current Change ∆IBmA
27.3 Vdc ≤ Vin ≤ 38 Vdc, IO = 500 mA – – 0.8
27 Vdc ≤ Vin ≤ 38 Vdc, TJ = 25°C – – 0.8
5.0 mA ≤ IO ≤ 1.0 A – – 0.5
Ripple Rejection RR 45 54 – dB
28 Vdc ≤ Vin ≤ 38 Vdc, f = 120 Hz, IO = 500 mA
Dropout Voltage (IO = 1.0 A, TJ = 25°C) VI – VO–2.0 – Vdc
Output Noise Voltage (TA = 25°C) Vn– 10 – µV/VO
10 Hz ≤ f ≤ 100 kHz
Output Resistance (f = 1.0 kHz) rO– 1.4 – mΩ
Short Circuit Current Limit (TA = 25°C) ISC –0.2 – A
Vin = 35 Vdc
Peak Output Current (TJ = 25°C) Imax –2.2 – A
Average Temperature Coefficient of Output Voltage TCVO– –2.0 – mV/°C
NOTES: 1.Tlow = –40°C for MC78XXAC, C Thigh = +125°C for MC78XXAC, 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.
MC7800, MC7800A, LM340, LM340A Series
13
MOTOROLA ANALOG IC DEVICE DATA
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)
Figure 3. Ripple Rejection as a Function of
Frequency (MC78XXC, AC) Figure 4. Output Voltage as a Function of
Junction Temperature (MC7805C, AC)
Figure 5. Output Impedance as a Function of
Output Voltage (MC78XXC, AC) Figure 6. Quiescent Current as a Function of
Temperature (MC78XXC, AC)
IO
Vin–Vout, INPUT/OUPUT VOLT AGE DIFFERENTIAL (V)
3.0
2.0
1.5
1.0
04.0 8.0 12 20 30 40
, OUTPUT CURRENT (A)
80
70
60
50
40
4.0 6.0 8.0 10 12 14 16 18 20 22 24
VO, OUTPUT VOLTAGE (V)
RR, RIPPLE REJECTION (dB)
PART # Vin
MC7805C = 10 V
MC7806C = 11 V
MC7808C = 14 V
MC7812C = 19 V
MC7815C = 23 V
MC7818C = 27 V
MC7824C = 33 V
80
50
RR, RIPPLE REJECTION (dB)
0.1 10
f, FREQUENCY (kHz)
0.01
, OUTPUT VOLTAGE (V)
O
5.0
4.9
–60 –20 20 60 100 140 180
TJ, JUNCTION TEMPERATURE (
°
C)
V
, OUTPUT IMPEDANCE (m )
O
Ω
10
5.0
3.0
2.0
1.0
0.5
0.3
0.2
0.14.0 8.0 12 16 20 24
VO, OUTPUT VOLTAGE (V)
Z
, QUIESCENT CURRENT (mA)
B
6.0
4.0
3.0
2.0
1.0
0
–75 –50 TJ, JUNCTION TEMPERATURE (
°
C)
–25 0 25 50 75 100 125
I
2.5
0.5
70
40
30
60
4.8
6.0 10 15 25 35
TJ = 85
°C
TJ = 25
°C
1.0
f = 120 Hz
IO = 20 mA
∆
Vin = 1.0 V(RMS)
TJ = 125
°C
TJ = 0
°C
f = 120 Hz
IO = 500 mA
CL = 0
µ
F
Vin = 10 V
VO = 5.0 V
IL = 20 mA
Vin = 20 V
IO = 5.0 mA
MC78XXB, C, AC
Vin = 8.0 V to 18 V
IO = 500 mA
f = 120 Hz
TA = 25
°
C
TJ = –40
°C
MC7800, MC7800A, LM340, LM340A Series
14 MOTOROLA ANALOG IC DEVICE DATA
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.
IO
+
5.0 V
R
)
IB
Figure 7. Current Regulator Figure 8. Adjustable Output Regulator
Figure 9. Current Boost Regulator Figure 10. Short Circuit Protection
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:
For example, a 1.0 A current source would require R to be a 5.0
Ω
,
10 W resistor and the output voltage compliance would be the input
voltage less 7.0 V.
IB
^
3.2 mA over line and load changes.
Input
0.33
µ
FR
IO
MC7805
Constant
Current to
Grounded
Load
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.
Input
MC7805
Output
0.33
µ
F
10 k
MC1741G
7
6
4
1.0 k
VO = 7.0 V to 20 V
VIN = VO
≥
2.0 V
0.1
µ
F
3
2
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 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.
XX = 2 digits of type number indicating voltage.
MC78XX
Input
Output
R
1.0
µ
F
MJ2955 or Equiv.
1.0
µ
F
The circuit of Figure 9 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, a
four–ampere plastic power transistor is specified.
XX = 2 digits of type number indicating voltage.
1.0
µ
F
MC78XX
MJ2955
or Equiv.
Output
RSC
R
2N6049
or Equiv.
≥
10
µ
F
RSource
0.33
µ
FInput
RSource
0.33
µ
F
≥
10
µ
F