MC78T00_04 Datasheet, PDF (1/12 Pages) ON Semiconductor – 3.0 A Positive Voltage Regulators

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
Input
C_in*
0.33 mF
MC78TXX
Output
C_O**
Figure 1. Simplified Application
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.
** C_in is required if regulator is located an appreciable distance from power supply filter.
** (See Applications Information for details.)
** C_O is not needed for stability; however, it does improve transient response.
http://onsemi.com
3A
POSITIVE FIXED
VOLTAGE REGULATORS
MARKING
DIAGRAMS
TO−220
T SUFFIX
CASE 221A
MC
78TxxyzT
AWLYWW
1
2
3
Pin 1. Input
2. Ground*
3. Output
*Heatsink surface is connected to Pin 2.
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
© Semiconductor Components Industries, LLC, 2004
March, 2004 − Rev. 4
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 10 of this data sheet.
1
Publication Order Number:
MC78T00/D