Datasheet
Semiconductor Components Industries, LLC, 2002
January, 2002 – Rev. 9
1 Publication Order Number:
MC78M00/D
MC78M00, MC78M00A
Series
500 mA Positive Voltage
Regulators
The MC78M00/MC78M00A Series positive voltage regulators are
identical to the popular MC7800 Series devices, except that they are
specified for only half the output current. Like the MC7800 devices,
the MC78M00 three–terminal regulators are intended for local,
on–card voltage regulation.
Internal current limiting, thermal shutdown circuitry and safe–area
compensation for the internal pass transistor combine to make these
devices remarkably rugged under most operating conditions.
Maximum output current, with adequate heatsinking is 500 mA.
• No External Components Required
• Internal Thermal Overload Protection
• Internal Short Circuit Current Limiting
• Output Transistor Safe–Area Compensation
• MC78M00A High Accuracy (±2%) Available for 5.0 V, 8.0 V, 12 V
and 15 V
Figure 1. Representative Schematic Diagram
This device contains 28 active transistors.
1.0 k 1.0 k
Input
210
6.7
V
16 k
100
200
300
3.6
k
6.4
k
520
6.0 k
2.0 k 3.9 k
6.0
k
2.8 k
40
pF
5.6 k
3.0 k
1.0 k
300
20050
13
0.24
Gnd
Output
10 pF
2.6 k
TO–220
T SUFFIX
CASE 221A
1
http://onsemi.com
DPAK
DT SUFFIX
CASE 369A
MARKING
DIAGRAMS
xx = Voltage Option
Z = A, B, or C Option
A = Assembly Location
L = Wafer Lot
Y = Year
WW = Work Week
2
3
See detailed ordering and shipping information in the package
dimensions section on page 10 of this data sheet.
ORDERING INFORMATION
Heatsink surface
connected to Pin 2.
Pin 1. Input
2. Ground
3. Output
Heatsink surface (shown as terminal 4 in
case outline drawing) is connected to Pin 2.
1
3
8MxxZ
ALYWW
MC
ALYWW
78MxxZT