Order this document by MC79M00/D
Three-Terminal Negative
Voltage Regulators
The MC79M00 series of fixed output negative voltage regulators are
intended as complements to the popular MC78M00 series devices.
Available in fixed output voltage options of –5.0, –8.0, –12 and –15 V,
these regulators employ current limiting, thermal shutdown, and safe–area
compensation – making them remarkably rugged under most operating
conditions. With adequate heatsinking they can deliver output currents in
excess of 0.5 A.
•
No External Components Required
MC79M00
Series
THREE–TERMINAL
NEGATIVE FIXED
VOLTAGE REGULATORS
•
•
•
•
Internal Thermal Overload Protection
Internal Short Circuit Current Limiting
Output Transistor Safe–Area Compensation
Also Available in Surface Mount DPAK (DT) Package
DEVICE TYPE/NOMINAL OUTPUT VOLTAGE
MC79M05
MC79M08
–5.0 V
–8.0 V
MC79M12
MC79M15
–12 V
–15 V
Pin 1. Ground
2. Input
3. Output
Package
DPAK
TJ = – 40° to +125°C
4.0%
4 0%
TJ = 0° to +125°C
Plastic Power
DPAK
Plastic Power
1
3
1
2
3
T SUFFIX
PLASTIC PACKAGE
CASE 221A
Heatsink surface
connected to Pin 2.
1
2
3
ORDERING INFORMATION
Output
Voltage
Tolerance
Operating
Temperature Range
Device
MC79MXXBDT, BDT–1
MC79MXXBT
MC79MXXCDT, CDT–1
MC79MXXCT
XX indicates nominal voltage.
DT SUFFIX
PLASTIC PACKAGE
CASE 369A
(DPAK)
DT–1 SUFFIX
PLASTIC PACKAGE
CASE 369
(DPAK)
Heatsink surface (shown as terminal 4 in
case outline drawing) is connected to Pin 2.
Representative Schematic Diagram
Gnd
2.4 k
2.0 k
14.7 k
2.0 k
11.5 k
STANDARD APPLICATION
25
3.6 k
547
Input
4.0 k
R1
MC79MXX
Output
CO**
1.0
µF
1.2 k
1.0 k
12 k
2.0 k
Cin*
0.33
µF
4.9 k
R2
10 k
20 pF
10 pF 10 k
2.0 k
1.1 k
20 k 20 k
100
750
240
0.3
VI
VO
A common ground is required between the input
and the output voltages. The input voltage must
remain typically 1.1 V more negative even during
the high point of the input ripple voltage.
XX, 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 improve stability and transient response.
This device contains 31 active transistors.
©
Motorola, Inc. 1996
Rev 4
MOTOROLA ANALOG IC DEVICE DATA
1
MC79M00
MAXIMUM RATINGS
(TA = 25°C, unless otherwise noted.)
Rating
Input Voltage
Power Dissipation
Case 221A
TA = 25°C
Thermal Resistance, Junction–to–Ambient
Thermal Resistance, Junction–to–Case
Case 369 and 369A (DPAK)
TA = 25°C
Thermal Resistance, Junction–to–Ambient
Thermal Resistance, Junction–to–Case
Storage Junction Temperature
Junction Temperature
NOTE:
ESD data available upon request.
Symbol
VI
Value
–35
Unit
Vdc
PD
θ
JA
θ
JC
PD
θ
JA
θ
JC
Tstg
TJ
Internally Limited
65
5.0
Internally Limited
92
6.0
–65 to +150
150
W
°C/W
°C/W
W
°C/W
°C/W
°C
°C
THERMAL CHARACTERISTICS
Characteristic
Thermal Resistance, Junction–to–Ambient
Thermal Resistance, Junction–to–Case
Symbol
R
θJA
R
θJC
Value
65
5.0
Unit
°C/W
°C/W
MC79M05B, C
ELECTRICAL CHARACTERISTICS
(VI = –10 V, IO = 350 mA, Tlow to Thigh [Note 2], unless otherwise noted.)
Characteristic
Output Voltage (TJ = 25°C)
Line Regulation, TJ = 25°C (Note 1)
–7.0 Vdc
≥
VI
≥
–25 Vdc
–8.0 Vdc
≥
VI
≥
–18 Vdc
Load Regulation, TJ = 25°C (Note 1)
5.0 mA
≤
IO
≤
500 mA
Output Voltage
–7.0 Vdc
≥
VI
≥
–25 Vdc, 5.0 mA
≤
IO
≤
350 mA
Input Bias Current (TJ = 25°C)
Input Bias Current Change
–8.0 Vdc
≥
VI
≥
–25 Vdc, IO = 350 mA
5.0 mA
≤
IO
≤
350 mA, VI = –10 V
Output Noise Voltage, TA = 25°C, 10 Hz
≤
f
≤
100 kHz
Ripple Rejection (f = 120 Hz)
Dropout Voltage
IO = 500 mA, TJ = 25°C
Average Temperature Coefficient of Output Voltage
IO = 5.0 mA, 0°C
≤
TJ
≤
125°C
Symbol
VO
Regline
–
–
Regload
–
VO
–4.75
IIB
∆I
IB
–
–
Vn
RR
VI–VO
–
∆V
O/∆T
–
0.2
–
1.1
–
mV/°C
–
54
–
–
40
66
0.4
0.4
–
–
µV
dB
Vdc
–
–
4.3
–5.25
8.0
mA
mA
30
100
Vdc
7.0
2.0
50
30
mV
Min
–4.8
Typ
–5.0
Max
–5.2
Unit
Vdc
mV
NOTES:
1. Load and line regulation are specified at constant temperature. Change in VO due to heating effects must be taken into account separately. Pulse
testing with low duty cycle is used.
2. B = Tlow to Thigh, –40°C < TJ < 125°C
C = Tlow to Thigh, 0°C < TJ < 125°C
2
MOTOROLA ANALOG IC DEVICE DATA
MC79M00
MC79M08B, C
ELECTRICAL CHARACTERISTICS
(VI = –10 V, IO = 350 mA, Tlow to Thigh [Note 2], unless otherwise noted.)
Characteristic
Output Voltage (TJ = 25°C)
Line Regulation, TJ = 25°C (Note 1)
–7.0 Vdc
≥
VI
≥
–25 Vdc
–8.0 Vdc
≥
VI
≥
–18 Vdc
Load Regulation, TJ = 25°C (Note 1)
5.0 mA
≤
IO
≤
500 mA
Output Voltage
–7.0 Vdc
≥
VI
≥
–25 Vdc, 5.0 mA
≤
IO
≤
350 mA
Input Bias Current (TJ = 25°C)
Input Bias Current Change
–8.0 Vdc
≥
VI
≥
–25 Vdc, IO = 350 mA
5.0 mA
≤
IO
≤
350 mA, VI = –10 V
Output Noise Voltage, TA = 25°C, 10 Hz
≤
f
≤
100 kHz
Ripple Rejection (f = 120 Hz)
Dropout Voltage
IO = 500 mA, TJ = 25°C
Average Temperature Coefficient of Output Voltage
IO = 5.0 mA, 0°C
≤
TJ
≤
125°C
Symbol
VO
Regline
–
–
Regload
–
VO
–7.6
IIB
∆I
IB
–
–
Vn
RR
VI–VO
–
∆V
O/∆T
–
0.4
–
1.1
–
mV/°C
–
54
–
–
60
63
0.4
0.4
–
–
µV
dB
Vdc
–
–8.0
–
–8.4
8.0
mA
mA
30
100
Vdc
5.0
3.0
80
50
mV
Min
–7.7
Typ
–8.0
Max
–8.3
Unit
Vdc
mV
MC79M12B, C
ELECTRICAL CHARACTERISTICS
(VI = –19 V, IO = 350 mA, Tlow to Thigh [Note 2], unless otherwise noted.)
Characteristic
Output Voltage (TJ = 25°C)
Line Regulation, TJ = 25°C (Note 1)
–14.5 Vdc
≥
VI
≥
–30 Vdc
–15 Vdc
≥
VI
≥
–25 Vdc
Load Regulation, TJ = 25°C (Note 1)
5.0 mA
≤
IO
≤
500 mA
Output Voltage
–14.5 Vdc
≥
VI
≥
–30 Vdc, 5.0 mA
≤
IO
≤
350 mA
Input Bias Current (TJ = 25°C)
Input Bias Current Change
–14.5 Vdc
≥
VI
≥
–30 Vdc, IO = 350 mA
5.0 mA
≤
IO
≤
350 mA, VI = –19 V
Output Noise Voltage, TA = 25°C, 10 Hz
≤
f
≤
100 kHz
Ripple Rejection (f = 120 Hz)
Dropout Voltage
IO = 500 mA, TJ = 25°C
Average Temperature Coefficient of Output Voltage
IO = 5.0 mA, 0°C
≤
TJ
≤
125°C
Symbol
VO
Regline
–
–
Regload
–
VO
–11.4
IIB
∆I
IB
–
–
Vn
RR
VI–VO
–
∆V
O/∆T
–
–0.8
–
1.1
–
mV/°C
–
54
–
–
75
60
0.4
0.4
–
–
µV
dB
Vdc
–
–
4.4
–12.6
8.0
mA
mA
30
240
Vdc
5.0
3.0
80
50
mV
Min
–11.5
Typ
–12
Max
–12.5
Unit
Vdc
mV
NOTES:
1. Load and line regulation are specified at constant temperature. Change in VO due to heating effects must be taken into account separately. Pulse
testing with low duty cycle is used.
2. B = Tlow to Thigh, –40°C < TJ < 125°C
C = Tlow to Thigh, 0°C < TJ < 125°C
MOTOROLA ANALOG IC DEVICE DATA
3
MC79M00
MC79M15B, C
ELECTRICAL CHARACTERISTICS
(VI = – 23 V, IO = 350 mA, Tlow to Thigh [Note 2], unless otherwise noted.)
Characteristic
Output Voltage (TJ = 25°C)
Line Regulation, TJ = 25°C (Note 1)
–17.5 Vdc
≥
VI
≥
–30 Vdc
–18 Vdc
≥
VI
≥
–28 Vdc
Load Regulation, TJ = 25°C (Note 1)
5.0 mA
≤
IO
≤
500 mA
Output Voltage
–17.5 Vdc
≥
VI
≥
–30 Vdc, 5.0 mA
≤
IO
≤
350 mA
Input Bias Current (TJ = 25°C)
Input Bias Current Change
–17.5 Vdc
≥
VI
≥
–30 Vdc, IO = 350 mA
5.0 mA
≤
IO
≤
350 mA, VI = –23 V
Output Noise Voltage, TA = 25°C, 10 Hz
≤
f
≤
100 kHz
Ripple Rejection (f = 120 Hz)
Dropout Voltage
IO = 500 mA, TJ = 25°C
Average Temperature Coefficient of Output Voltage
IO = 5.0 mA, 0°C
≤
TJ
≤
125°C
Symbol
VO
Regline
–
–
Regload
–
VO
–14.25
IIB
∆I
IB
–
–
Vn
RR
VI–VO
–
∆V
O/∆T
–
–1.0
–
1.1
–
mV/°C
–
54
–
–
90
60
0.4
0.4
–
–
µV
dB
Vdc
–
–
4.4
–15.75
8.0
mA
mA
30
240
Vdc
5.0
3.0
80
50
mV
Min
–14.4
Typ
–15
Max
–15.6
Unit
Vdc
mV
NOTES:
1. Load and line regulation are specified at constant temperature. Change in VO due to heating effects must be taken into account separately. Pulse
testing with low duty cycle is used.
2. B = Tlow to Thigh, –40°C < TJ < 125°C
C = Tlow to Thigh, 0°C < TJ < 125°C
Figure 1. DPAK Thermal Resistance and Maximum
Power Dissipation versus P.C.B. Copper Length
Free Air
Mounted
Vertically
Minimum
Size Pad
PD(max) for TA = 50°C
2.0 oz. Copper
L
L
PD, MAXIMUM POWER DISSIPATION (W)
100
R
θ
JA, THERMAL RESISTANCE
JUNCTION-TO-AIR (
°
C/W)
90
80
70
60
50
R
θJA
40
0
5.0
10
15
20
25
30
L, LENGTH OF COPPER (mm)
2.4
2.0
1.6
1.2
0.8
0.4
0
4
ÎÎÎÎ
ÎÎÎÎ
ÎÎÎÎ
MOTOROLA ANALOG IC DEVICE DATA
MC79M00
OUTLINE DIMENSIONS
T SUFFIX
PLASTIC PACKAGE
CASE 221A–06
ISSUE Y
–T–
B
4
SEATING
PLANE
F
T
S
C
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
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
Q
1 2 3
A
U
K
H
Z
L
V
G
D
N
R
J
DT SUFFIX
PLASTIC PACKAGE
CASE 369A–13
(DPAK)
ISSUE Y
–T–
B
V
R
4
SEATING
PLANE
C
E
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
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
–––
S
1
2
3
A
K
F
L
D
G
2 PL
Z
U
J
H
0.13 (0.005)
T
DIM
A
B
C
D
E
F
G
H
J
K
L
R
S
U
V
Z
M
MOTOROLA ANALOG IC DEVICE DATA
5
Microcontroller MCU
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