Order this document by MC7800/D
MC7800,
MC7800A, LM340,
Three-Terminal Positive
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.
LM340A Series
THREE–TERMINAL
POSITIVE FIXED
VOLTAGE REGULATORS
SEMICONDUCTOR
TECHNICAL DATA
•
•
•
•
•
•
•
•
Output Current in Excess of 1.0 A
No External Components Required
Internal Thermal Overload Protection
Internal Short Circuit Current Limiting
Output Transistor Safe–Area Compensation
Output Voltage Offered in 2% and 4% Tolerance
Available in Surface Mount D2PAK and Standard 3–Lead Transistor
Packages
Previous Commercial Temperature Range has been Extended to a
Junction Temperature Range of –40°C to +125°C
T SUFFIX
PLASTIC PACKAGE
CASE 221A
Heatsink surface
connected to Pin 2.
1
2
3
Pin 1. Input
2. Ground
3. Output
DEVICE TYPE/NOMINAL OUTPUT VOLTAGE
MC7805AC
LM340AT–5
MC7805C
LM340T–5
MC7806AC
MC7806C
MC7808AC
MC7808C
MC7809C
MC7812AC
LM340AT–12
60V
6.0
8.0
80V
9.0 V
12 V
5.0
50V
MC7812C
LM340T–12
MC7815AC
LM340AT–15
MC7815C
LM340T–15
MC7818AC
MC7818C
MC7824AC
MC7824C
18 V
24 V
15 V
12 V
D2T SUFFIX
PLASTIC PACKAGE
CASE 936
(D2PAK)
1
2
3
Heatsink surface (shown as terminal 4 in
case outline drawing) is connected to Pin 2.
STANDARD APPLICATION
Input
Cin*
0.33
µF
MC78XX
Output
CO**
ORDERING INFORMATION
Device
MC78XXACT
Insertion Mount
LM340AT–XX
MC78XXACD2T
MC78XXCT
LM340T–XX
MC78XXCD2T
XX indicates nominal voltage.
4%
Surface Mount
TJ = –40° to +125°C
40°
125°C
Insertion Mount
2%
Surface Mount
Output Voltage
Tolerance
Operating
Temperature Range
Package
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.
XX, These two digits of the type number
indicate nominal voltage.
* Cin is required if regulator is located an
appreciable distance from power supply
filter.
** CO is not needed for stability; however,
it does improve transient response. Values
of less than 0.1
µF
could cause instability.
©
Motorola, Inc. 1997
Rev 5
MOTOROLA ANALOG IC DEVICE DATA
1
MOTOROLA [ MOTOROLA, INC ]
