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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 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
MC78L00, A Series
MAXIMUM RATINGS (TA = +125°C, unless otherwise noted.)
Rating Input Voltage (2.6 V–8.0 V) Input Voltage (12 V–18 V) Input Voltage (24 V) Storage Temperature Range Operating Junction Temperature Range Symbol VI Value 30 35 40 –65 to +150 0 to +150 Unit Vdc
Tstg TJ
°C °C
ELECTRICAL CHARACTE.