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MC78L00A Series Three-Terminal Low Current Positive Voltage Regulators The MC78L00A Series of positive voltage regulators are inexpensive, easy­to­use 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 diode­resistor combination, as output impedance and quiescent current are substantially reduced. · Wide Range of Available, Fixed Output Voltages · Low Cost · Internal Short Circuit Current Limiting · Internal Thermal Overload Protection · No External Components Required · Complementary Negative Regulators Offered (MC79L00A Series) Representative Schematic Diagram Input Q12 Q1 Q10 3.8k Q4 Q6 5.0k 3.0 0­25k Output 8 1 http://onsemi.com 1 Pin: 1. Output 2. Ground 3. Input 2 3 TO­92 P SUFFIX CASE 29 SOP­8* D SUFFIX CASE 751 15k Q3 Q5 Q11 *SOP­8 is an internally modified SO­8 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. SOP­8 conforms to all external dimensions of the standard SO­8 package. PIN CONNECTIONS VOUT 1 8 7 6 5 (Top View) Ground VIN GND GND NC 1.2k Q2 1.9k 19k C 2.2k Q9 Q8 2.85k GND 2 GND 3 NC 4 Z1 420 Q7 1.0k Standard Application Input Cin* 0.33µF MC78LXXA Output CO** DEVICE TYPE/NOMINAL VOLTAGE 5% Output Voltage Accuracy MC78L05AC MC78L08AC MC78L09AC MC78L12AC MC78L15AC MC78L18AC MC78L24AC Voltage 5.0 8.0 9.0 12 15 18 24 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 See detailed ordering and shipping information in the package dimensions section on page 7 of this data sheet. © Semiconductor Components Industries, LLC, 1999 1 October, 1999 ­ Rev. 0 Publication Order Number: MC78L00A/D MC78L00A Series MAXIMUM RATINGS (TA = +125°C, unless otherwise noted.) Rating Input Voltage (2.6 V­8.0 V) Input Voltage (12 V­18 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 CHARACTERISTICS (VI = 10 V, IO = 40 mA, CI = 0.33 µF, CO = 0.1 µF, ­ 40°C < TJ < +125°C (for MC78LXXAB), 0°C < TJ < +125°C (for MC78LXXAC), unless otherwise noted.) MC78L05AC, AB Characteristics Output Voltage (TJ = +25°C) Line Regu