mc78t08ct ON Semiconductor, mc78t08ct Datasheet

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mc78t08ct

Manufacturer Part Number
mc78t08ct
Description
3.0 A Positive Voltage Regulators
Manufacturer
ON Semiconductor
Datasheet
MC78T00 Series
3.0 A Positive Voltage
Regulators
circuits capable of driving loads in excess of 3.0 A. These
three−terminal regulators employ internal current limiting, thermal
shutdown, and safe−area compensation. Devices are available with
improved specifications, including a 2% output voltage tolerance, on
AC−suffix 5.0 V, 12 V and 15 V device types.
devices can be used with external components to obtain adjustable
voltages and currents. This series of devices can be used with a
series−pass transistor to supply up to 15 A at the nominal output
voltage.
March, 2004 − Rev. 4
This family of fixed voltage regulators are monolithic integrated
Although designed primarily as a fixed voltage regulator, these
XX these two digits of the type number indicate voltage.
must remain typically 2.2 V above the output voltage even during the low point on the input
ripple voltage.
Output Current in Excess of 3.0 A
Power Dissipation: 25 W
No External Components Required
Output Voltage Offered in 2% and 4% Tolerance*
Thermal Regulation is Specified
Internal Thermal Overload Protection
Internal Short Circuit Current Limiting
Output Transistor Safe−Area Compensation
Pb−Free Packages are Available
Semiconductor Components Industries, LLC, 2004
A common ground is required between the input and the output voltages. The input voltage
** C
**
** C
(See Applications Information for details.)
in
O
is required if regulator is located an appreciable distance from power supply filter.
is not needed for stability; however, it does improve transient response.
0.33 mF
Input
C
Figure 1. Simplified Application
in
*
MC78TXX
C
O
Output
**
1
*Heatsink surface is connected to Pin 2.
See detailed ordering and shipping information in the package
dimensions section on page 10 of this data sheet.
1
MC
A = Assembly Location
WL= Wafer Lot
Y = Year
W = Work Week
2
xx = Voltage Option
y = “A” letter for precise 2% regulators, not
z = temperature range, “B” for wide
VOLTAGE REGULATORS
3
= Specific Device Code
used for standard 4% regulators.
temperature range, −40 C to +125 C, “C”
for standard temperature range,
0 C to +125 C.
ORDERING INFORMATION
POSITIVE FIXED
http://onsemi.com
CASE 221A
Pin 1. Input
CASE 936
T SUFFIX
D
TO−220
2
3 A
PAK−3
2. Ground*
3. Output
Publication Order Number:
DIAGRAMS
MARKING
78TxxyzD2T
AWLYWW
AWLYWW
78TxxyzT
MC78T00/D
MC
MC

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mc78t08ct Summary of contents

Page 1

MC78T00 Series 3.0 A Positive Voltage Regulators This family of fixed voltage regulators are monolithic integrated circuits capable of driving loads in excess of 3.0 A. These three−terminal regulators employ internal current limiting, thermal shutdown, and safe−area compensation. Devices are ...

Page 2

MAXIMUM RATINGS (T = +25 C, unless otherwise noted.) A Rating Input Voltage (5.0 V − Input Voltage (15 V) Power Dissipation and Thermal Characteristics Plastic Package (Note + Thermal Resistance, Junction−to−Air T ...

Page 3

ELECTRICAL CHARACTERISTICS Characteristics Characteristics Short Circuit Current Limit ( Vdc + Peak Output Current ( Average Temperature Coefficient of Output Voltage (I = 5.0 mA Although power ...

Page 4

ELECTRICAL CHARACTERISTICS Characteristics Output Voltage ( 2.0 A, 14.5 Vdc V 27 Vdc Line Regulation (Note 7) (14.5 Vdc ...

Page 5

ELECTRICAL CHARACTERISTICS Characteristics Output Voltage ( 2.0 A, 17.5 Vdc V 30 Vdc Line Regulation (Note 9) (17.6 Vdc ...

Page 6

VOLTAGE REGULATOR PERFORMANCE The performance of a voltage regulator is specified by its immunity to changes in load, input voltage, power dissipation, and temperature. Line and load regulation are tested with a pulse of short duration (< 100 ms) and ...

Page 7

T , JUNCTION TEMPERATURE ( C) J Figure 4. Temperature Stability 100 out 1.5 A out 5.0 V out ...

Page 8

I = 3.0 A out 2.0 I out 1 0.5 A out 1 0.5 −90 −50 − JUNCTION TEMPERATURE ( C) J Figure 10. Dropout Voltage 0.8 V ...

Page 9

Design Considerations The MC78T00 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 ...

Page 10

... MC78T05ACT 2%* MC78T05ACTG 2%* MC78T05BT 4% MC78T05BTG 4% MC78T05CD2T 4% MC78T05CD2TR4 4% MC78T05CT 4% MC78T05CTG 4% MC78T08CT 4% MC78T12ACT 2%* MC78T12BT 4% MC78T12CT 4% MC78T15ABT 2%* MC78T15ACT 2%* MC78T15CT 4% NOTE: Automotive temperature range selections are available with special test conditions and additional tests. Contact your local ON Semiconductor sales office for information. †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D ...

Page 11

PACKAGE DIMENSIONS MC78T00 Series TO−220 T SUFFIX CASE 221A−09 ISSUE AA NOTES: SEATING 1. DIMENSIONING AND TOLERANCING PER ANSI −T− PLANE Y14.5M, ...

Page 12

... C 10.66 0.42 *For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. 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. “ ...

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