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PDF MC79L00A Data sheet ( Hoja de datos )
| Número de pieza | MC79L00A | |
| Descripción | THREE-TERMINAL LOW CURRENT NEGATIVE FIXED VOLTAGE REGULATORS | |
| Fabricantes | ON Semiconductor | |
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MC79L00, MC79L00A Series
100 mA Negative Voltage
Regulators
The MC79L00, A Series negative voltage regulators are
inexpensive, easy−to−use devices suitable for numerous applications
requiring up to 100 mA. Like the higher powered MC7900 Series
negative regulators, this series features thermal shutdown and current
limiting, making them remarkably rugged. In most applications, no
external components are required for operation.
The MC79L00 devices are useful for on−card regulation or any
other application where a regulated negative voltage at a modest
current level is needed. These regulators offer substantial advantage
over the common resistor/Zener diode approach.
Features
• No External Components Required
• Internal Short Circuit Current Limiting
• Internal Thermal Overload Protection
• Low Cost
• Complementary Positive Regulators Offered (MC78L00 Series)
• Pb−Free Packages are Available
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R6
R
R8
Q10
5 Q5
R18
R1
Q4
R9
GND
R17
R7
Q8 Q14
Q1
R2
Z1
R3
R4
Q9 R16
Output
Q12
C Q2
Q13
Q6 Q7 Q11
R10 R11
R14 R15
Input
* Automotive temperature range selections are available with special test conditions
and additional tests in 5, 12 and 15 V devices. Contact your local ON Semiconductor
sales office for information.
Figure 1. Representative Schematic Diagram
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THREE−TERMINAL LOW
CURRENT NEGATIVE FIXED
VOLTAGE REGULATORS
8
Pin 1. Vout
2. Vin
1 3. Vin
SOIC−8
D SUFFIX
4. NC
5. GND
CASE 751
6. Vin
7. Vin
8. NC
MARKING
DIAGRAMS
8
9Lxxx
ALYW
G
1
Pin 1. Ground
2. Input
3. Output
TO−92
1
2
P SUFFIX
CASE 29
3
MC79L
xxxxx
ALYWW G
G
xxx = Specific Device Code
A = Assembly Location
L = Wafer Lot
Y = Year
W, WW = Work Week
y = B or C
G = Pb−Free Package
(Note: Microdot may be in either location)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 7 of this data sheet.
© Semiconductor Components Industries, LLC, 2006
October, 2006 − Rev. 8
1
Publication Order Number:
MC79L00/D
1 page  
MC79L00, MC79L00A Series
APPLICATIONS INFORMATION
Design Considerations
The MC79L00, A Series of fixed voltage regulators are
designed with Thermal Overload Protections 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.
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 length, 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 mF 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. Bypassing the output is also
recommended.
+Vin
0.33mF
MC78LXX
+VO
0.1mF
Input
CI*
0.33mF
MC79LXX
Output
CO**
0.1mF
−Vin
0.33mF
MC79LXX
0.1mF
−VO
Figure 2. Positive and Negative Regulator
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 ripple voltage.
* CI is required if regulator is located an appreciable
* distance from the power supply filter
** CO improves stability and transient response.
Figure 3. Standard Application
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5
5 Page 
MC79L00, MC79L00A Series
PACKAGE DIMENSIONS
TO−92 (TO−226)
CASE 29−11
ISSUE AL
A
R
SEATING
PLANE
B
P
L
K
XX
H
V
G
C
1
N
N
D
J
SECTION X−X
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. CONTOUR OF PACKAGE BEYOND DIMENSION R
IS UNCONTROLLED.
4. LEAD DIMENSION IS UNCONTROLLED IN P AND
BEYOND DIMENSION K MINIMUM.
INCHES
DIM MIN MAX
A 0.175 0.205
B 0.170 0.210
C 0.125 0.165
D 0.016 0.021
G 0.045 0.055
H 0.095 0.105
J 0.015 0.020
K 0.500 −−−
L 0.250 −−−
N 0.080 0.105
P −−− 0.100
R 0.115 −−−
V 0.135 −−−
MILLIMETERS
MIN MAX
4.45 5.20
4.32 5.33
3.18 4.19
0.407 0.533
1.15 1.39
2.42 2.66
0.39 0.50
12.70 −−−
6.35 −−−
2.04 2.66
−−− 2.54
2.93 −−−
3.43 −−−
ON Semiconductor and
are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice
to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC 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 special, consequential or incidental
damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over
time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under
its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body,
or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death
may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees,
subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of
personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part.
SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.
PUBLICATION ORDERING INFORMATION
LITERATURE FULFILLMENT:
Literature Distribution Center for ON Semiconductor
P.O. Box 5163, Denver, Colorado 80217 USA
Phone: 303−675−2175 or 800−344−3860 Toll Free USA/Canada
Fax: 303−675−2176 or 800−344−3867 Toll Free USA/Canada
Email: [email protected]
N. American Technical Support: 800−282−9855 Toll Free
USA/Canada
Europe, Middle East and Africa Technical Support:
Phone: 421 33 790 2910
Japan Customer Focus Center
Phone: 81−3−5773−3850
ON Semiconductor Website: www.onsemi.com
Order Literature: http://www.onsemi.com/orderlit
For additional information, please contact your local
Sales Representative
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11
MC79L00/D
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet MC79L00A.PDF ] | |
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