THREE–TERMINAL
POSITIVE FIXED
VOLTAGE REGULATORS
These voltage regulators are monolithic integrated circuits designed as
fixed–voltage regulators for a wide variety of applications including local,
on–card regulation. These regulators employ internal current limiting,
thermal shutdown, and safe–area compensation. With adequate heatsinking
they can deliver output currents in excess of 1.0 A. Although designed
primarily as a fixed voltage regulator, these devices can be used with
external components to obtain adjustable voltages and currents.
SEMICONDUCTOR
TECHNICAL DATA
• Output Current in Excess of 1.0 A
• No External Components Required
T SUFFIX
PLASTIC PACKAGE
CASE 221A
• Internal Thermal Overload Protection
• Internal Short Circuit Current Limiting
• Output Transistor Safe–Area Compensation
• Output Voltage Offered in 2% and 4% Tolerance
Heatsink surface
connected to Pin 2.
1
2
2
• Available in Surface Mount D PAK and Standard 3–Lead Transistor
3
Packages
Pin 1. Input
2. Ground
3. Output
D2T SUFFIX
PLASTIC PACKAGE
CASE 936
2
(D PAK)
2
1
3
Heatsink surface (shown as terminal 4 in
case outline drawing) is connected to Pin 2.
DEVICE TYPE/NOMINAL OUTPUT VOLTAGE
STANDARD APPLICATION
MC7805
MC7806
MC7808
MC7809
5.0 V
6.0 V
8.0 V
9.0 V
MC7812
MC7815
MC7818
MC7824
12 V
15 V
18 V
24 V
MC78XX
Input
Output
C **
C *
in
0.33 µF
O
ORDERING INFORMATION
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 input ripple
voltage.
Output Voltage
Tolerance
Operating
Temperature Range
Device
Package
MC78XXACT
MC78XXACD2T
MC78XXCT
Insertion Mount
Surface Mount
Insertion Mount
Surface Mount
Insertion Mount
Surface Mount
2%
4%
XX,
T = 0° to +125°C
J
These two digits of the type number
indicate nominal voltage.
* C is required if regulator is located an
in
appreciable distance from power supply
filter.
MC78XXCD2T
MC78XXBT
T = – 40° to +125°C
J
** C is not needed for stability; however,
O
MC78XXBD2T
it does improve transient response. Values
XX indicates nominal voltage.
of less than 0.1 µF could cause instability.
3–182
MOTOROLA ANALOG IC DEVICE DATA