MOTOROLA MC78M09ACT Three-terminal medium current positive fixed voltage regulator Datasheet

Order this document by MC78M00/D
THREE–TERMINAL MEDIUM
CURRENT POSITIVE FIXED
VOLTAGE REGULATORS
The MC78M00/MC78M00A Series positive voltage regulators are
identical to the popular MC7800 Series devices, except that they are
specified for only half the output current. Like the MC7800 devices, the
MC78M00 three–terminal regulators are intended for local, on–card voltage
regulation.
Internal current limiting, thermal shutdown circuitry and safe–area
compensation for the internal pass transistor combine to make these
devices remarkably rugged under most operating conditions. Maximum
output current, with adequate heatsinking is 500 mA.
• No External Components Required
•
•
•
•
•
SEMICONDUCTOR
TECHNICAL DATA
Internal Thermal Overload Protection
T SUFFIX
PLASTIC PACKAGE
CASE 221A
(TO–220)
Internal Short Circuit Current Limiting
Output Transistor Safe–Area Compensation
MC78M00A High Accuracy (±2%) Available for 5.0 V, 8.0 V, 12 V
and 15 V
Previous Commerical Temperature Range has been extended to a
Junction Temperature Range of –40°C to +125°C
Heatsink surface
connected to Pin 2.
1
2
3
Pin 1. Input
2. Ground
3. Output
Representative Schematic Diagram
1.0 k
Input
1.0 k
210
6.7
V 16 k
1
1
100
3
300
1.0 k
3.6
k
DT SUFFIX
PLASTIC PACKAGE
CASE 369A
(DPAK)
300
10 pF
5.6 k
520
50
2.6 k
2.0 k
DT–1 SUFFIX
PLASTIC PACKAGE
CASE 369
(DPAK)
0.24
13
6.0 k
3
200
3.0 k
6.4
k
2
200
Heatsink surface (shown as terminal 4 in
case outline drawing) is connected to Pin 2.
Output
40
pF
3.9 k
6.0
k
2.8 k
ORDERING INFORMATION
Gnd
Device
This device contains 28 active transistors.
Operating
Temperature Range Package
MC78MXXCDT
DEVICE TYPE/NOMINAL OUTPUT VOLTAGE
MC78M05AC
MC78M05C
MC78M06C
MC78M08AC
MC78M08C
5.0 V
5.0 V
6.0 V
8.0 V
8.0 V
MC78M09C
MC78M12AC
MC78M12C
MC78M15AC
MC78M15C
9.0 V
12 V
12 V
15 V
15 V
MC78M18C
MC78M20C
MC78M24C
MC78MXXACDT*
18 V
20 V
24 V
MC78MXXCT
TO–220
MC78MXXACT*
XX Indicates nominal voltage.
*
Available in 5.0, 8.0, 12 and 15 V devices.
 Motorola, Inc. 1997
MOTOROLA ANALOG IC DEVICE DATA
DPAK
TJ = – 40° to +125°C
Rev 6
1
MC78M00 MC78M00A Series
MAXIMUM RATINGS (TA = 25°C, unless otherwise noted.)
Rating
Symbol
Value
Unit
VI
35
40
Vdc
Power Dissipation (Package Limitation)
Plastic Package, T Suffix
TA = 25°C
Thermal Resistance, Junction–to–Air
Thermal Resistance, Junction–to–Case
PD
θJA
θJC
Internally Limited
70
5.0
°C/W
°C/W
Plastic Package, DT Suffix
TA = 25°C
Thermal Resistance, Junction–to–Air
Thermal Resistance, Junction–to–Case
PD
θJA
θJC
Internally Limited
92
5.0
°C/W
°C/W
TJ
+150
°C
Tstg
–65 to +150
°C
Input Voltage (5.0 V–18 V)
(20 V–24V)
Operating Junction Temperature Range
Storage Temperature Range
NOTE:
ESD data available upon request.
MC78M05C/AC ELECTRICAL CHARACTERISTICS (VI = 10 V, IO = 350 mA, –40°C < TJ < 125°C, PD ≤ 5.0 W,
unless otherwise noted.)
Characteristics
Symbol
Output Voltage (TJ = 25°C)
MC78M05C
MC78M05AC
VO
Output Voltage Variation
(7.0 Vdc ≤ VI ≤ 20 Vdc, 5.0 mA ≤ IO ≤ 350 mA)
MC78M05C
MC78M05AC
VO
Min
Typ
Max
4.8
4.9
5.0
5.0
5.2
5.1
Unit
Vdc
Vdc
4.75
4.80
–
–
5.25
5.20
–
3.0
5.0
–
–
20
10
100
50
–
3.2
6.0
–
–
–
–
0.8
0.5
–
40
–
62
62
–
80
–
–
VI–VO
–
2.0
–
Vdc
IOS
∆VO/∆T
–
50
–
mA
–
±0.2
–
mV/°C
Peak Output Current
(TJ = 25°C)
IO
–
700
–
mA
2
MOTOROLA ANALOG IC DEVICE DATA
Line Regulation
(TJ = 25°C, 7.0 Vdc ≤ VI ≤ 25 Vdc, IO = 200 mA)
Regline
Load Regulation
(TJ = 25°C, 5.0 mA ≤ IO ≤ 200 mA)
(TJ = 25°C, 5.0 mA ≤ IO ≤ 500 mA)
Regload
Input Bias Current (TJ = 25°C)
Quiescent Current Change
(8.0 Vdc ≤ VI ≤ 25 Vdc, IO = 200 mA)
(5.0 mA ≤ IO ≤ 350 mA)
Output Noise Voltage (TA = 25°C, 10 Hz ≤ f ≤ 100 kHz)
Ripple Rejection
(IO = 100 mA, f = 120 Hz, 8.0 V ≤ VI ≤ 18 V)
(IO = 300 mA, f = 120 Hz, 8.0 ≤ VI ≤ 18 V, TJ = 25°C)
Dropout Voltage
(TJ = 25°C)
Short Circuit Current Limit (TJ = 25°C, VI = 35 V)
Average Temperature Coefficient of Output Voltage
(IO = 5.0 mA)
IIB
∆IIB
Vn
RR
mV
mV
mA
mA
µV
dB
MC78M00 MC78M00A Series
MC78M06C ELECTRICAL CHARACTERISTICS (VI = 11 V, IO = 350 mA, –40°C < TJ < 125°C, PD ≤ 5.0 W, unless otherwise noted.)
Characteristics
Symbol
Min
Typ
Max
Unit
VO
VO
5.75
6.0
6.25
Vdc
5.7
–
6.3
Vdc
Line Regulation
(TJ = 25°C, 8.0 Vdc ≤ VI ≤ 25 Vdc, IO = 200 mA)
Regline
–
5.0
50
mV
Load Regulation
(TJ = 25°C, 5.0 mA ≤ IO ≤ 500 mA)
(TJ = 25°C, 5.0 mA ≤ IO ≤ 200 mA)
Regload
–
–
20
10
120
60
–
3.2
6.0
–
–
–
–
0.8
0.5
–
45
–
59
59
–
80
–
–
Output Voltage (TJ = 25°C)
Output Voltage Variation
(8.0 Vdc ≤ VI ≤ 21 Vdc, 5.0 mA ≤ IO ≤ 350 mA)
Input Bias Current (TJ = 25°C)
Quiescent Current Change
(9.0 Vdc ≤ VI ≤ 25 Vdc, IO = 200 mA)
(5.0 mA ≤ IO ≤ 350 mA)
Output Noise Voltage (TA = 25°C, 10 Hz ≤ f ≤ 100 kHz)
Ripple Rejection
(IO = 100 mA, f = 120 Hz, 9.0 V ≤ VI ≤ 19 V)
(IO = 300 mA, f = 120 Hz, 9.0 V ≤ VI ≤ 19 V, TJ = 25°C)
IIB
∆IIB
Vn
RR
mV
mA
mA
µV
dB
Dropout Voltage
(TJ = 25°C)
VI – VO
–
2.0
–
Vdc
Short Circuit Current Limit (TJ = 25°C, VI = 35 V)
IOS
∆VO/∆T
–
50
–
mA
–
±0.2
–
mV/°C
IO
–
700
–
mA
Unit
Average Temperature Coefficient of Output Voltage
(IO = 5.0 mA)
Peak Output Current
(TJ = 25°C)
MC78M08C/AC ELECTRICAL CHARACTERISTICS (VI = 14 V, IO = 350 mA, –40°C < TJ < 125°C, PD ≤ 5.0 W,
unless otherwise noted.)
Characteristics
Symbol
Output Voltage (TJ = 25°C)
MC78M08C
MC78M08AC
VO
Output Voltage Variation
(10.5 Vdc ≤ VI ≤ 23 Vdc, 5.0 mA ≤ IO ≤ 350 mA)
MC78M08C
MC78M08AC
VO
Dropout Voltage
(TJ = 25°C)
Short Circuit Current Limit (TJ = 25°C, VI = 35 V)
Average Temperature Coefficient of Output Voltage
(IO = 5.0 mA)
Peak Output Current
(TJ = 25°C)
MOTOROLA ANALOG IC DEVICE DATA
8.0
8.0
8.30
8.16
Vdc
Vdc
–
6.0
50
–
–
25
10
160
80
–
3.2
6.0
–
–
–
–
0.8
0.5
–
52
–
56
56
–
80
–
–
VI–VO
–
2.0
–
Vdc
IOS
∆VO/∆T
–
50
–
mA
–
±0.2
–
mV/°C
IO
–
700
–
mA
Regload
Ripple Rejection
(IO = 100 mA, f = 120 Hz, 11.5 V ≤VI ≤ 21.5 V)
(IO = 300 mA, f = 120 Hz, 11.5 V ≤VI ≤ 21.5 V, TJ = 25°C)
7.70
7.84
8.4
8.3
Load Regulation
(TJ = 25°C, 5.0 mA ≤ IO ≤ 500 mA)
(TJ = 25°C, 5.0 mA ≤ IO ≤ 200 mA)
Output Noise Voltage (TA = 25°C, 10 Hz ≤ f ≤ 100 kHz)
Max
–
–
Regline
Quiescent Current Change
(10.5 Vdc ≤ VI ≤ 25 Vdc, IO = 200 mA)
(5.0 mA ≤ IO ≤ 350 mA)
Typ
7.6
7.7
Line Regulation
(TJ = 25°C, 10.5 Vdc ≤ VI ≤ 25 Vdc, IO = 200 mA)
Input Bias Current (TJ = 25°C)
Min
IIB
∆IIB
Vn
RR
mV
mV
mA
mA
µV
dB
3
MC78M00 MC78M00A Series
MC78M09C ELECTRICAL CHARACTERISTICS (VI = 15 V, IO = 350 mA, –40°C < TJ < 125°C, PD ≤ 5.0 W, unless otherwise noted.)
Characteristics
Symbol
Min
Typ
Max
Unit
VO
VO
8.64
9.0
9.45
Vdc
8.55
–
9.45
Vdc
Line Regulation
(TJ = 25°C, 11.5 Vdc ≤ VI ≤ 25 Vdc, IO = 200 mA)
Regline
–
6.0
50
mV
Load Regulation
(TJ = 25°C, 5.0 mA ≤ IO ≤ 500 mA)
(TJ = 25°C, 5.0 mA ≤ IO ≤ 200 mA)
Regload
–
–
25
10
180
90
–
3.2
6.0
–
–
–
–
0.8
0.5
–
52
–
56
56
–
80
–
–
VI–VO
–
2.0
–
IOS
∆VO/∆T
–
50
–
mA
–
±0.2
–
mV/°C
IO
–
700
–
mA
Unit
Output Voltage (TJ = 25°C)
Output Voltage Variation
(11.5 Vdc ≤ VI ≤ 23 Vdc, 5.0 mA ≤ IO ≤ 350 mA)
Input Bias Current (TJ = 25°C)
Quiescent Current Change
(11.5 Vdc ≤ VI ≤ 25 Vdc, IO = 200 mA)
(5.0 mA ≤ IO ≤ 350 mA)
Output Noise Voltage (TA = 25°C, 10 Hz ≤ f ≤ 100 kHz)
Ripple Rejection
(IO = 100 mA, f = 120 Hz, 12.5 V ≤VI ≤ 22.5 V)
(IO = 300 mA, f = 120 Hz, 12.5 V ≤VI ≤ 22.5 V, TJ = 25°C)
Dropout Voltage
(TJ = 25°C)
Short Circuit Current Limit (TJ = 25°C, VI = 35 V)
Average Temperature Coefficient of Output Voltage
(IO = 5.0 mA)
Peak Output Current
(TJ = 25°C)
IIB
∆IIB
Vn
RR
mV
mA
mA
µV
dB
Vdc
MC78M12C/AC ELECTRICAL CHARACTERISTICS (VI = 19 V, IO = 350 mA, –40°C < TJ < 125°C, PD ≤ 5.0 W,
unless otherwise noted.)
Characteristics
Symbol
Output Voltage (TJ = 25°C)
MC78M12C
MC78M12AC
VO
Output Voltage Variation
(14.5 Vdc ≤ VI ≤ 27 Vdc, 5.0 mA ≤ IO ≤ 350 mA)
MC78M12C
MC78M12AC
VO
Min
Typ
Max
11.50
11.76
12
12
12.50
12.24
Vdc
Vdc
11.4
11.5
–
–
12.6
12.5
–
8.0
50
–
–
25
10
240
120
–
3.2
6.0
–
–
–
–
0.8
0.5
–
75
–
55
55
–
80
–
–
VI–VO
–
2.0
–
Vdc
IOS
–
50
–
mA
∆VO/∆T
–
±0.3
–
mV/°C
Peak Output Current
(TJ = 25°C)
IO
–
700
–
mA
4
MOTOROLA ANALOG IC DEVICE DATA
Line Regulation
(TJ = 25°C, 14.5 Vdc ≤ VI ≤ 30 Vdc, IO = 200 mA)
Regline
Load Regulation
(TJ = 25°C, 5.0 mA ≤ IO ≤ 500 mA)
(TJ = 25°C, 5.0 mA ≤ IO ≤ 200 mA)
Regload
Input Bias Current (TJ = 25°C)
Quiescent Current Change
(14.5 Vdc ≤ VI ≤ 30 Vdc, IO = 200 mA)
(5.0 mA ≤ IO ≤ 350 mA)
IIB
Vn
Ripple Rejection
(IO = 100 mA, f = 120 Hz, 15 V ≤VI ≤ 25 V)
(IO = 300 mA, f = 120 Hz, 15 V ≤VI ≤ 25 V, TJ = 25°C)
RR
Dropout Voltage
(TJ = 25°C)
Short Circuit Current Limit (TJ = 25°C, VI = 35 V)
Average Temperature Coefficient of Output Voltage
(IO = 5.0 mA)
mV
∆IIB
Output Noise Voltage (TA = 25°C, 10 Hz ≤ f ≤ 100 kHz)
mV
mA
mA
µV
dB
MC78M00 MC78M00A Series
MC78M15C/AC ELECTRICAL CHARACTERISTICS (VI = 23 V, IO = 350 mA, –40°C < TJ < 125°C, PD ≤ 5.0 W,
unless otherwise noted.)
Characteristics
Symbol
Output Voltage (TJ = 25°C)
MC78M15C
MC78M15AC
VO
Output Voltage Variation
(17.5 Vdc ≤ VI ≤ 30 Vdc, 5.0 mA ≤ IO ≤ 350 mA)
MC78M15C
MC78M15AC
VO
Dropout Voltage
(TJ = 25°C)
Short Circuit Current Limit (TJ = 25°C, VI = 35 V)
Average Temperature Coefficient of Output Voltage
(IO = 5.0 mA)
Peak Output Current
(TJ = 25°C)
15
15
15.6
15.3
Vdc
Vdc
–
10
50
–
–
25
10
300
150
–
3.2
6.0
–
–
–
–
0.8
0.5
–
90
–
54
54
–
70
–
–
VI–VO
–
2.0
–
IOS
∆VO/∆T
–
50
–
mA
–
±0.3
–
mV/°C
IO
–
700
–
mA
Regload
Ripple Rejection
(IO = 100 mA, f = 120 Hz, 18.5 V ≤ VI ≤ 28.5 V)
(IO = 300 mA, f = 120 Hz, 18.5 V ≤ VI ≤ 28.5 V, TJ = 25°C)
14.4
14.7
Unit
15.75
15.60
Load Regulation
(TJ = 25°C, 5.0 mA ≤ IO ≤ 500 mA)
(TJ = 25°C, 5.0 mA ≤ IO ≤ 200 mA)
Output Noise Voltage (TA = 25°C, 10 Hz ≤ f ≤ 100 kHz)
Max
–
–
Regline
Quiescent Current Change
(17.5 Vdc ≤ VI ≤ 30 Vdc, IO = 200 mA)
(5.0 mA ≤ IO ≤ 350 mA)
Typ
14.25
14.40
Input Regulation
(TJ = 25°C, 17.5 Vdc ≤ VI ≤ 30 Vdc, IO = 200 mA)
Input Bias Current (TJ = 25°C)
Min
IIB
∆IIB
Vn
RR
mV
mV
mA
mA
µV
dB
Vdc
MC78M18C ELECTRICAL CHARACTERISTICS (VI = 27 V, IO = 350 mA, –40°C < TJ < 125°C, PD ≤ 5.0 W, unless otherwise noted.)
Symbol
Min
Typ
Max
Unit
VO
VO
17.3
18
18.7
Vdc
17.1
–
18.9
Vdc
Line Regulation
(TJ = 25°C, 21 Vdc ≤ VI ≤ 33 Vdc, IO = 200 mA)
Regline
–
10
50
mV
Load Regulation
(TJ = 25°C, 5.0 mA ≤ IO ≤ 500 mA)
(TJ = 25°C, 5.0 mA ≤ IO ≤ 200 mA)
Regload
–
–
30
10
360
180
–
3.2
6.5
–
–
–
–
0.8
0.5
–
100
–
53
53
–
70
–
–
VI–VO
–
2.0
–
IOS
∆VO/∆T
–
50
–
mA
–
±0.3
–
mV/°C
IO
–
700
–
mA
Characteristics
Output Voltage (TJ = 25°C)
Output Voltage Variation
(21 Vdc ≤ VI ≤ 33 Vdc, 5.0 mA ≤ IO ≤ 350 mA)
Input Bias Current (TJ = 25°C)
Quiescent Current Change
(21 Vdc ≤ VI ≤ 33 Vdc, IO = 200 mA)
(5.0 mA ≤ IO ≤ 350 mA)
Output Noise Voltage (TA = 25°C, 10 Hz ≤ f ≤ 100 kHz)
Ripple Rejection
(IO = 100 mA, f = 120 Hz, 22 V ≤ VI ≤ 32 V)
(IO = 300 mA, f = 120 Hz, 22 V ≤ VI ≤ 32 V, TJ = 25°C)
Dropout Voltage
(TJ = 25°C)
Short Circuit Current Limit (TJ = 25°C, VI = 35 V)
Average Temperature Coefficient of Output Voltage
(IO = 5.0 mA)
Peak Output Current
(TJ = 25°C)
MOTOROLA ANALOG IC DEVICE DATA
IIB
∆IIB
Vn
RR
mV
mA
mA
µV
dB
Vdc
5
MC78M00 MC78M00A Series
MC78M20C ELECTRICAL CHARACTERISTICS (VI = 29 V, IO = 350 mA, –30°C < TJ < 125°C, PD ≤ 5.0 W, unless otherwise noted.)
Characteristics
Symbol
Min
Typ
Max
Unit
VO
VO
19.2
20
20.8
Vdc
19
–
21
Vdc
Line Regulation
(TJ = 25°C, 23 Vdc ≤ VI ≤ 35 Vdc, IO = 200 mA)
Regline
–
10
50
mV
Load Regulation
(TJ = 25°C, 5.0 mA ≤ IO ≤ 500 mA)
(TJ = 25°C, 5.0 mA ≤ IO ≤ 200 mA)
Regload
–
–
30
10
400
200
–
3.2
6.5
–
–
–
–
0.8
0.5
–
110
–
52
52
–
70
–
–
VI–VO
–
2.0
–
IOS
∆VO/∆T
–
50
–
mA
–
±0.5
–
mV/°C
IO
–
700
–
mA
Output Voltage (TJ = 25°C)
Output Voltage Variation
(23 Vdc ≤ VI ≤ 35 Vdc, 5.0 mA ≤ IO ≤ 350 mA)
Input Bias Current (TJ = 25°C)
Quiescent Current Change
(23 Vdc ≤ VI ≤ 35 Vdc, IO = 200 mA)
(5.0 mA ≤ IO ≤ 350 mA)
Output Noise Voltage (TA = 25°C, 10 Hz ≤ f ≤ 100 kHz)
Ripple Rejection
(IO = 100 mA, f = 120 Hz, 24 V ≤ VI ≤ 34 V)
(IO = 300 mA, f = 120 Hz, 24 V ≤ VI ≤ 34 V, TJ = 25°C)
Dropout Voltage
(TJ = 25°C)
Short Circuit Current Limit (TJ = 25°C, VI = 35 V)
Average Temperature Coefficient of Output Voltage
(IO = 5.0 mA)
Peak Output Current
(TJ = 25°C)
IIB
∆IIB
Vn
RR
mV
mA
mA
µV
dB
Vdc
MC78M24C ELECTRICAL CHARACTERISTICS (VI = 33 V, IO = 350 mA, –40°C < TJ < 125°C, PD ≤ 5.0 W, unless otherwise noted.)
Characteristics
Symbol
Min
Typ
Max
Unit
VO
VO
23
22.8
24
25
Vdc
–
25.2
Vdc
Line Regulation
(TJ = 25°C, 27 Vdc ≤ VI ≤ 38 Vdc, IO = 200 mA)
Regline
–
10
50
mV
Load Regulation
(TJ = 25°C, 5.0 mA ≤ IO ≤ 500 mA)
(TJ = 25°C, 5.0 mA ≤ IO ≤ 200 mA)
Regload
–
–
30
10
480
240
–
3.2
7.0
–
–
–
–
0.8
0.5
–
170
–
50
50
–
70
–
–
VI–VO
–
2.0
–
Vdc
IOS
∆VO/∆T
–
50
–
mA
–
±0.5
–
mV/°C
Peak Output Current
(TJ = 25°C)
IO
–
700
–
mA
6
MOTOROLA ANALOG IC DEVICE DATA
Output Voltage (TJ = 25°C)
Output Voltage Variation
(27 Vdc ≤ VI ≤ 38 Vdc, 5.0 mA ≤ IO ≤ 350 mA)
Input Bias Current (TJ = 25°C)
Quiescent Current Change
(27 Vdc ≤ VI ≤ 38 Vdc, IO = 200 mA)
(5.0 mA ≤ IO ≤ 350 mA)
Output Noise Voltage (TA = 25°C, 10 Hz ≤ f ≤ 100 kHz)
Ripple Rejection
(IO = 100 mA, f = 120 Hz, 28 V ≤ VI ≤ 38 V)
(IO = 300 mA, f = 120 Hz, 28 V ≤ VI ≤ 38 V, TJ = 25°C)
Dropout Voltage
(TJ = 25°C)
Short Circuit Current Limit (TJ = 25°C)
Average Temperature Coefficient of Output Voltage
(IO = 5.0 mA)
IIB
∆IIB
Vn
RR
mV
mA
mA
µV
dB
MC78M00 MC78M00A Series
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.
Input Bias 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.
Long Term Stability – Output voltage stability under
accelerated life test conditions with the maximum rated
voltage listed in the devices’ electrical characteristics and
maximum power dissipation.
2.4
100
90
JUNCTION–TO–AIR (°C/W)
R θ JA, THERMAL RESISTANCE
PD(max) for TA = 50°C
Free Air
Mounted
Vertically
2.0
ÎÎÎ
ÎÎÎ
ÎÎÎ
ÎÎÎ
2.0 oz. Copper
L
80
Minimum
Size Pad
70
L
60
50
1.6
1.2
0.8
0.4
RθJA
40
0
5.0
10
15
20
PD, MAXIMUM POWER DISSIPATION (W)
Figure 1. DPAK Thermal Resistance and Maximum
Power Dissipation versus P.C.B. Copper Length
0
30
25
L, LENGTH OF COPPER (mm)
Figure 2. Worst Case Power Dissipation
versus Ambient Temperature (TO–220)
PD, POWER DISSIPATION (W)
10
θHS = 10°C/W
5.0
Infinite Heat
Sink
θHS = 20°C/W
3.0
2.0
No Heat Sink
1.0
0.5
0.3
0.2
0.1
25
θJC = 5°C/W
PD(max) = 7.52 W
50
75
100
125
150
TA, AMBIENT TEMPERATURE (°C)
MOTOROLA ANALOG IC DEVICE DATA
7
MC78M00 MC78M00A Series
Figure 3. Peak Output Current versus
Dropout Voltage
Figure 4. Dropout Voltage versus
Junction Temperature
2.5
1.0
0.8
V I –V O , DROPOUT VOLTAGE (V)
I O , OUTPUT CURRENT (A)
0.9
TJ = 25°C
0.7
0.6
0.5
TJ = 125°C
0.4
0.3
0.2
0.1
0
0
5.0
10
15
20
25
30
35
2.0
IO = 500 mA
1.5
IO = 100 mA
1.0
∆VO = 100 mV
0.5
0
40
IO = 10 mA
0
25
VI – VO, DROPOUT VOLTAGE (V)
75
100
125
150
TJ, JUNCTION TEMPERATURE (°C)
Figure 5. Ripple Rejection versus Frequency
Figure 6. Ripple Rejection versus Output Current
100
100
Iout = 500 mA
RR, RIPPLE REJECTION (dB)
RR, RIPPLE REJECTION (dB)
50
80
Iout = 500 mA
Vout = 5.0 V
Vin = 10 V
CO = 0
TJ = 25°C
60
40
20
1.0
10
100
1.0 k
10 k
100 k
1.0 M
10 M
80
Vout = 5.0 V
Vin = 10 V
CO = 0
f = 120 Hz
TJ = 25°C
60
40
30
0.01
100 M
f, FREQUENCY (Hz)
0.1
0.5 1.0
10
IO, OUTPUT CURRENT (A)
Figure 7. Bias Current versus Input Voltage
Figure 8. Bias Current versus Output Current
5.0
4.0
3.0
TJ = 125°C
2.0
TJ = 25°C
VO = 5.0 V
IO = 0.5 A
1.0
TJ = 125°C
0
0
5.0
10
15
20
25
VI, INPUT VOLTAGE (Vdc)
8
I B , BIAS CURRENT (mA)
I B , BIAS CURRENT (mA)
TJ = 25°C
30
4.0
TJ = 25°C
3.0
2.0
TJ = 125°C
1.0
35
40
0
0.01
VI–VO = 5.0 V
0.1
0.5
1.0
10
IO, OUTPUT CURRENT (A)
MOTOROLA ANALOG IC DEVICE DATA
MC78M00 MC78M00A Series
APPLICATIONS INFORMATION
Design Considerations
The MC78M00/MC78M00A 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
regulator’s 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 9. Current Regulator
Figure 10. Adjustable Output Regulator
VO, 7.0 V to 20 V
Vin–Vout ≥ 2.0 V
MC78M05C
Input
0.33 µF
R
IO
Constant
Current to
Grounded
Load
Output
MC78M05C
Input
7
0.33 µF
The MC78M00 regulators can also be used as a current source
when connected as above. In order to minimize dissipation the
MC78M05C is chosen in this application. Resistor R determines
the current as follows:
IO =
6
*
+
1.0 k
2
0.1 µF
3
10 k
4
MC1741
5.0 V
+ IIB
R
IIB = 1.5 mA over line and load changes.
For example, a 500 mA 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.
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 12. Current Boost with
Short Circuit Protection
Figure 11. Current Boost Regulator
MJ2955 or Equiv.
Input
RSC
Input
R
MC78MXXC
1.0 µF
MJ2955
or Equiv.
Output
1.0 µF
XX = 2 digits of type number indicating voltage.
R
2N6049
or Equiv.
MC78MXXC
1.0 µF
Output
XX = 2 digits of type number indicating voltage.
The MC78M00 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.
MOTOROLA ANALOG IC DEVICE DATA
The circuit of Figure NO TAG 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 4.0 A plastic power transistor
is specified.
9
MC78M00 MC78M00A Series
OUTLINE DIMENSIONS
T SUFFIX
PLASTIC PACKAGE
CASE 221A–06
(TO–220)
ISSUE Y
–T–
B
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. DIMENSION Z DEFINES A ZONE WHERE ALL
BODY AND LEAD IRREGULARITIES ARE
ALLOWED.
SEATING
PLANE
C
F
T
S
4
DIM
A
B
C
D
F
G
H
J
K
L
N
Q
R
S
T
U
V
Z
A
Q
1 2 3
U
H
K
Z
L
R
V
J
G
D
N
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
DT SUFFIX
PLASTIC PACKAGE
CASE 369A–13
(DPAK)
ISSUE Y
–T–
C
B
V
E
R
4
Z
A
S
1
2
3
U
K
F
J
L
H
D
G
10
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
SEATING
PLANE
2 PL
0.13 (0.005)
M
DIM
A
B
C
D
E
F
G
H
J
K
L
R
S
U
V
Z
INCHES
MIN
MAX
0.235
0.250
0.250
0.265
0.086
0.094
0.027
0.035
0.033
0.040
0.037
0.047
0.180 BSC
0.034
0.040
0.018
0.023
0.102
0.114
0.090 BSC
0.175
0.215
0.020
0.050
0.020
–––
0.030
0.050
0.138
–––
MILLIMETERS
MIN
MAX
5.97
6.35
6.35
6.73
2.19
2.38
0.69
0.88
0.84
1.01
0.94
1.19
4.58 BSC
0.87
1.01
0.46
0.58
2.60
2.89
2.29 BSC
4.45
5.46
0.51
1.27
0.51
–––
0.77
1.27
3.51
–––
T
MOTOROLA ANALOG IC DEVICE DATA
MC78M00 MC78M00A Series
OUTLINE DIMENSIONS
DT–1 SUFFIX
PLASTIC PACKAGE
CASE 369–07
(DPAK)
ISSUE L
C
B
V
E
R
4
A
1
2
3
S
–T–
K
SEATING
PLANE
J
F
H
D
G
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
DIM
A
B
C
D
E
F
G
H
J
K
R
S
V
INCHES
MIN
MAX
0.235
0.250
0.250
0.265
0.086
0.094
0.027
0.035
0.033
0.040
0.037
0.047
0.090 BSC
0.034
0.040
0.018
0.023
0.350
0.380
0.175
0.215
0.050
0.090
0.030
0.050
MILLIMETERS
MIN
MAX
5.97
6.35
6.35
6.73
2.19
2.38
0.69
0.88
0.84
1.01
0.94
1.19
2.29 BSC
0.87
1.01
0.46
0.58
8.89
9.65
4.45
5.46
1.27
2.28
0.77
1.27
3 PL
0.13 (0.005)
MOTOROLA ANALOG IC DEVICE DATA
M
T
11
MC78M00 MC78M00A Series
Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding
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
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12
◊
MC78M00/D
MOTOROLA ANALOG IC DEVICE
DATA
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