LM78L12AC National Semiconductor 12V Positive Regulator Data Sheet

Description

This PDF datasheet is for the National LM78L12AC voltage regulator.

National Semiconductor LM78L12AC 3-Terminal 12-Volt Positive Regulator

The LM78LXX series of three terminal positive regulators is available with several fixed output voltages making them useful in a wide range of applications. When used as a zener diode/resistor combination replacement, the LM78LXX usually results in an effective output impedance improvement of two orders of magnitude, and lower quiescent current. These regulators can provide local on card regulation, eliminating the distribution problems associated with single point regulation. The voltages available allow the LM78LXX to be used in logic systems, instrumentation, HiFi, and other solid state electronic equipment.
The LM78LXX is available in the plastic TO-92 (Z) package, the plastic SO-8 (M) package and a chip sized package (8-Bump micro SMD) using National’s micro SMD package technology. With adequate heat sinking the regulator can deliver 100 mA output current. Current limiting is included to limit the peak output current to a safe value. Safe area protection for the output transistors is provided to limit internal power dissipation. If internal power dissipation becomes too high for the heat sinking provided, the thermal shutdown circuit takes over preventing the IC from overheating.

FEATURES:
– Output voltage tolerances of +/-5% over the temperature range
– Output current of 100 mA
– Internal thermal overload protection
– Output transistor safe area protection
– Internal short circuit current limit
– Available in plastic TO-92 and plastic SO-8 low profile packages
– No external components
– Output voltage of 12V

CONNECTION DIAGRAMS
– SO-8 Plastic (M)
– 8-Bump micro SMD
– (TO-92) Plastic Package (Z)
– micro SMD Marking Orientation

(PDF) DATASHEET (ENGLISH)

CONTENTS

CONNECTION DIAGRAMS
– SO-8 Plastic (M)
– 8-Bump micro SMD
– (TO-92) Plastic Package (Z)
– micro SMD Marking Orientation

LM78L12AC PINOUT

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

TYPICAL PERFORMANCE CHARACTERISTICS
– Maximum Average Power Dissipation (Z Package)
– Peak Output Current
– Dropout Voltage
– Ripple Rejection
– Output Impedance
– Quiescent Current

EQUIVALENT CIRCUIT

TYPICAL APPLICATIONS
– Fixed Output Regulator
– Adjustable Output Regulator
– Current Regulator
– Regulator with Short Circuit Protection
– Dual Power Supply
– Variable Output Regulator

PHYSICAL DIMENSIONS

Why download the Datasheet?

This datasheet provides all the information from National Semiconductor about the LM78L12AC Regulator, as detailed in the table of contents. Reading it completely will address most questions you might have. You can download and save it for offline use, including viewing it on your device or printing it for your convenience if you prefer a paper version.

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