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MC78T12BT Arkusz danych(PDF) 1 Page - ON Semiconductor

Numer części MC78T12BT
Szczegółowy opis  3.0 A Positive Voltage Regulators
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© Semiconductor Components Industries, LLC, 2004
March, 2004 − Rev. 4
1
Publication Order Number:
MC78T00/D
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 available with
improved specifications, including a 2% output voltage tolerance, on
AC−suffix 5.0 V, 12 V and 15 V device types.
Although designed primarily as a fixed voltage regulator, these
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.
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
Figure 1. Simplified Application
Input
Output
Cin*
0.33
mFCO**
MC78TXX
A common ground is required between the input and the output voltages. The input voltage
must remain typically 2.2 V above the output voltage even during the low point on the input
ripple voltage.
XX these two digits of the type number indicate voltage.
** Cin is required if regulator is located an appreciable distance from power supply filter.
** (See Applications Information for details.)
** CO is not needed for stability; however, it does improve transient response.
3 A
POSITIVE FIXED
VOLTAGE REGULATORS
TO−220
T SUFFIX
CASE 221A
Pin 1. Input
2. Ground*
3. Output
*Heatsink surface is connected to Pin 2.
1
2
3
http://onsemi.com
See detailed ordering and shipping information in the package
dimensions section on page 10 of this data sheet.
ORDERING INFORMATION
MARKING
DIAGRAMS
D2PAK−3
CASE 936
MC
78TxxyzD2T
AWLYWW
MC
= Specific Device Code
xx = Voltage Option
y
= “A” letter for precise 2% regulators, not
used for standard 4% regulators.
z
= temperature range, “B” for wide
temperature range, −40
°C to +125°C, “C”
for standard temperature range,
0
°C to +125°C.
A = Assembly Location
WL= Wafer Lot
Y = Year
W = Work Week
MC
78TxxyzT
AWLYWW


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