The LM78L series (LM78Lxx throughout this document) of three terminal positive regulators
is available with several fixed output voltages, making them useful in a wide range of
applications. Used as a Zener-diode and resistor combination replacement, the LM78Lxx usually
provides an effective output impedance improvement of two orders of magnitude and lower quiescent
current. These regulators can provide local, on-card regulation, eliminating distribution problems
associated with single-point regulation. The available voltages 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 (LP) package, the SOIC (D) package, and a
chip-sized package (8-Bump DSBGA) using TI’s DSBGA 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 is too high for the heat sinking
provided, the thermal shutdown circuit prevents the IC from overheating.See the AN-1112 DSBGA Wafer
Level Chip Scale Package application note for DSBGA considerations. For more
information on the TO-92 package, see the TO-92 Packing Options/Ordering Instructions application
report.
