Order this document by MC78L00/D
MC78L00, A
Three-Terminal Low Current
Positive Voltage Regulators
The MC78L00, A Series of positive voltage regulators are inexpensive,
easy–to–use devices suitable for a multitude of applications that require a
regulated supply of up to 100 mA. Like their higher powered MC7800 and
MC78M00 Series cousins, these regulators feature internal current limiting
and thermal shutdown making them remarkably rugged. No external
components are required with the MC78L00 devices in many applications.
These devices offer a substantial performance advantage over the
traditional zener diode–resistor combination, as output impedance and
quiescent current are substantially reduced.
•
Wide Range of Available, Fixed Output Voltages
P SUFFIX
CASE 29
Series
Pin 1. Output
2. GND
3. Input
1
2
3
•
•
•
•
•
•
Low Cost
Internal Short Circuit Current Limiting
Internal Thermal Overload Protection
No External Components Required
Complementary Negative Regulators Offered (MC79L00 Series)
Available in either
±5%
(AC) or
±10%
(C) Selections
8
1
D SUFFIX
PLASTIC PACKAGE
CASE 751
(SOP–8)*
Vout
GND
GND
NC
5.
6.
7.
8.
NC
GND
GND
Vin
Pin 1.
2.
3.
4.
Representative Schematic Diagram
Input
Q12
Q1
Q10
3.8k
Q4
Q6
5.0k
3.0
0–25k
Output
15k
Q3
Q5
Q11
* SOP–8 is an internally modified SO–8 package.
Pins 2, 3, 6, and 7 are electrically common to the die
attach flag. This internal lead frame modification
decreases package thermal resistance and
increases power dissipation capability when
appropriately mounted on a printed circuit board.
SOP–8 conforms to all external dimensions of the
standard SO–8 package.
Standard Application
Input
Cin*
0.33µF
MC78LXX
Output
CO**
1.2k
Q2
1.9k
19k
C
2.2k
Q9
Q8
2.85k
Z1
420
Q7
1.0k
Ground
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.
*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.
ORDERING INFORMATION
Device
MC78LXXACD*
MC78LXXACP
MC78LXXCP
MC78LXXABD*
MC78LXXABP*
TJ = –40° to +125°C
TJ = 0° to +125°C
0
12 C
Operating
Temperature Range
Package
SOP–8
Plastic Power
Plastic Power
SOP–8
Plastic Power
DEVICE TYPE/NOMINAL VOLTAGE
10%
MC78L05C
MC78L08C
MC78L09C
MC78L12C
MC78L15C
MC78L18C
MC78L24C
5%
MC78L05AC
MC78L08AC
MC78L09AC
MC78L12AC
MC78L15AC
MC78L18AC
MC78L24AC
Voltage
5.0
8.0
9.0
12
15
18
24
XX indicates nominal voltage
*Available in 5, 8, 9, 12 and 15 V devices.
©
Motorola, Inc. 1996
Rev 3
MOTOROLA ANALOG IC DEVICE DATA
1
MOTOROLA [ MOTOROLA, INC ]
