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PDF MC79M08CDT Data sheet ( Hoja de datos )
| Número de pieza | MC79M08CDT | |
| Descripción | THREE-TERMINAL NEGATIVE FIXED VOLTAGE REGULATORS | |
| Fabricantes | Motorola Semiconductors | |
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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
• 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
ORDERING INFORMATION
Device
Output
Voltage
Tolerance
Operating
Temperature Range
Package
MC79MXXBDT, BDT–1
MC79MXXBT
MC79MXXCDT, CDT–1
MC79MXXCT
4.0%
TJ = – 40° to +125°C
TJ = 0° to +125°C
DPAK
Plastic Power
DPAK
Plastic Power
XX indicates nominal voltage.
Representative Schematic Diagram
Gnd
MC79M00
Series
THREE–TERMINAL
NEGATIVE FIXED
VOLTAGE REGULATORS
T SUFFIX
PLASTIC PACKAGE
CASE 221A
Heatsink surface
connected to Pin 2.
Pin 1. Ground
2. Input
3. Output
1
2
3
1
3
DT SUFFIX
PLASTIC PACKAGE
CASE 369A
(DPAK)
1
23
DT–1 SUFFIX
PLASTIC PACKAGE
CASE 369
(DPAK)
Heatsink surface (shown as terminal 4 in
case outline drawing) is connected to Pin 2.
STANDARD APPLICATION
4.0 k R1
Input
Cin*
0.33 µF
MC79MXX
Output
CO**
1.0 µF
R2
10 k VO
20 pF
10 pF 10 k
2.0 k
1.1 k
20 k 20 k
240
100
750
This device contains 31 active transistors.
0.3
VI
MOTOROLA ANALOG IC DEVICE DATA
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.
© Motorola, Inc. 1996
Rev 4
1
1 page  
MC79M00
OUTLINE DIMENSIONS
T SUFFIX
PLASTIC PACKAGE
CASE 221A–06
ISSUE Y
Q
H
Z
B
4
1 23
F
T
–T–
SEATING
PLANE
C
S
A
U
K
L
V
G
N
D
R
J
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.
INCHES
DIM MIN MAX
A 0.570 0.620
B 0.380 0.405
C 0.160 0.190
D 0.025 0.035
F 0.142 0.147
G 0.095 0.105
H 0.110 0.155
J 0.018 0.025
K 0.500 0.562
L 0.045 0.060
N 0.190 0.210
Q 0.100 0.120
R 0.080 0.110
S 0.045 0.055
T 0.235 0.255
U 0.000 0.050
V 0.045 –––
Z ––– 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
B
VR
–T–
SEATING
PLANE
C
E
S
F
4
1 23
A
K
J
LH
D 2 PL
G 0.13 (0.005) M T
U
Z
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
INCHES
DIM MIN MAX
A 0.235 0.250
B 0.250 0.265
C 0.086 0.094
D 0.027 0.035
E 0.033 0.040
F 0.037 0.047
G 0.180 BSC
H 0.034 0.040
J 0.018 0.023
K 0.102 0.114
L 0.090 BSC
R 0.175 0.215
S 0.020 0.050
U 0.020 –––
V 0.030 0.050
Z 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 –––
MOTOROLA ANALOG IC DEVICE DATA
5
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