MC7800, MC7800A, LM340,
LM340A Series, NCV7805
1.0 A 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.
http://onsemi.com
TO−220−3
T SUFFIX
CASE 221A
Heatsink surface
connected to Pin 2.
1
3
• Output Current in Excess of 1.0 A
• No External Components Required
2
3
2
• Internal Thermal Overload Protection
• Internal Short Circuit Current Limiting
• Output Transistor Safe−Area Compensation
• Output Voltage Offered in 2% and 4% Tolerance
D PAK−3
D2T SUFFIX
CASE 936
Pin 1. Input
2. Ground
3. Output
1
Heatsink surface (shown as terminal 4 in
case outline drawing) is connected to Pin 2.
2
• Available in Surface Mount D PAK−3, DPAK−3 and Standard
3−Lead Transistor Packages
DPAK−3
• Pb−Free Package May be Available. The G−Suffix Denotes a
Pb−Free Lead Finish
DT SUFFIX
CASE 369A
1
3
MAXIMUM RATINGS (T = 25°C, unless otherwise noted.)
A
STANDARD APPLICATION
Rating
Symbol
Value
Unit
MC78XX
Input
Output
C **
Input Voltage (5.0 − 18 V)
Input Voltage (24 V)
V
I
35
40
Vdc
C *
in
0.33 mF
O
Power Dissipation
Case 221A (TO−220−3)
A common ground is required between the
T = 25°C
P
Internally
Limited
W
A
D
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.
Thermal Resistance, Junction−to−Ambient
Thermal Resistance, Junction−to−Case
R
65
5.0
°C/W
°C/W
q
JA
JC
R
q
2
Case 936 (D PAK−3)
T = 25°C
A
XX,
These two digits of the type number
indicate nominal voltage.
P
Internally
Limited
W
D
* C is required if regulator is located an
in
Thermal Resistance, Junction−to−Ambient
R
See
Figure
14
°C/W
q
JA
JA
D
appreciable distance from power supply
filter.
** C is not needed for stability; however,
O
Thermal Resistance, Junction−to−Case
Case 369A (DPAK−3)
R
5.0
°C/W
q
it does improve transient response. Values
of less than 0.1 mF could cause instability.
T = 25°C
A
P
Internally
Limited
W
ORDERING INFORMATION
Thermal Resistance, Junction−to−Ambient
Thermal Resistance, Junction−to−Case
R
92
5.0
°C/W
°C/W
q
JA
JC
See detailed ordering and shipping information in the package
dimensions section on page 16 of this data sheet.
R
q
Storage Junction Temperature Range
T
stg
−65 to
+150
°C
DEVICE MARKING INFORMATION
See general marking information in the device marking
section on page 18 of this data sheet.
Operating Junction Temperature
T
J
+150
°C
Semiconductor Components Industries, LLC, 2004
1
Publication Order Number:
January, 2004 − Rev. 11
MC7800/D