3-TERMINAL 1A POSITIVE VOLTAGE REGULATORS
The MC78XX/MC78XXA series of three-terminal positive regulators are available in the
TO-220 package and with several fixed output voltages, making it useful in a wide range
of applications. These regulators can provide local onward regulation, eliminating the
distribution problems associated with single point regulation. Each type employs internal
current limiting, thermal shut-down and safe area protection, making it essentially
indestructible. If adequate heat sinking is provided, they can derive over aA output
current. Although designed primarily as fixed voltage regulators, these devices can be
used with external components to obtain adjustable voltages and currents. MC78XXI is
characterized for operation from -40°℃ to ＋125℃, and MC78XXC from 0℃ to ＋125℃.
TO-220 1 2 3 1 : Input 2 : GND 3 : Output
FEATURES
Output Current up to 1.5A
Output voltages of 5;6;8;9;10;11;12;15;18;24V
Thermal Overload Protection
Short Circuit Protection
Output Transistor SOA Protection
No external components required
Output current in excess of 1A
Industrial and commercial temperature range
ORDERING INFORMATION
BLOCK DIAGRAM
ABSOLUTE MAXIMUM RATINGS
Device
MC78XXCT
MC78XXACT
MC78XXT
Device
MC78XXCT
MC78XXACT
MC78XXT
Package
TO-220
TO-220
TO-220
Operating Temperature
0~＋125℃
－40~＋125℃
Characteristic
Input Voltage (for V
o = 5V to 18V)
(for V
o = 24V)
Thermal Resistance Junction - Cases
Thermal Resistance Junction - Air
Operating Temperature Range MC78XXC/AC
MC78XXI
Storage Temperature Range
Symbol
V
IN
VIN
θJC
θJA
Topr
Tstg
Unit
V
V
℃/W
θ/W
℃
℃
℃
Rating
35
40
5
65
0 ~ ＋125
－40 ~ ＋125
－65 ~ ＋150
12. Specifications of main components
12-1 Regulator
64
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