Order this document by MC78L00/D
MC78L00, A
Series
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
Pin 1. Output
2. GND
3. Input
Low Cost
1
Internal Thermal Overload Protection
Pin 1.
2.
3.
4.
No External Components Required
Complementary Negative Regulators Offered (MC79L00 Series)
Available in either ±5% (AC) or ±10% (C) Selections
Representative Schematic Diagram
Q3
15k
Input
Q11
Q5
2
3
D SUFFIX
PLASTIC PACKAGE
CASE 751
(SOP–8)*
8
Internal Short Circuit Current Limiting
1
Vout
GND
GND
NC
5.
6.
7.
8.
NC
GND
GND
Vin
* 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.
Q12
Q1
Q10
5.0k
3.8k
Q4
1.9k
1.2k
Q6
19k
Standard Application
Output
0–25k
Input
MC78LXX
Cin*
0.33µF
2.2k
Output
CO**
Q9
C
Q8
Q2
Z1
3.0
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.
2.85k
Q7
420
1.0k
Ground
*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
Operating
Temperature Range
TJ = 0° to +125°C
0
12 C
MC78LXXCP
10%
5%
Voltage
Plastic Power
MC78L05C
MC78L08C
MC78L09C
MC78L12C
MC78L15C
MC78L18C
MC78L24C
MC78L05AC
MC78L08AC
MC78L09AC
MC78L12AC
MC78L15AC
MC78L18AC
MC78L24AC
5.0
8.0
9.0
12
15
18
24
Plastic Power
MC78LXXABD*
MC78LXXABP*
DEVICE TYPE/NOMINAL VOLTAGE
SOP–8
MC78LXXACD*
MC78LXXACP
Package
SOP–8
TJ = –40° to +125°C
XX indicates nominal voltage
*Available in 5, 8, 9, 12 and 15 V devices.
Plastic Power
© Motorola, Inc. 1996
MOTOROLA ANALOG IC DEVICE DATA
Rev 3
1
