1 Features

• Input voltage: up to 30V operating

– New chip: 45V absolute maximum

– Legacy chip: 35V absolute maximum

• Available output voltages:

– New chip: 3.3V, 5V, 6V, 12V, 15V

– Legacy chip: 5V, 6.2V, 8.2V, 9V, 12V, 15V

• Output current: 100mA

• Internal thermal overload protection

• Output current limiting

• No external components required for stability

• Wide absolute maximum junction temperature:

– New chip: -40°C to 150°C

– Legacy chip: see the Absolute Maximum Ratings

• Package options:

– SOIC

– SOT-89 (new chip only)

– TO-92 (legacy chip only)

– DSBGA (legacy chip only)

• Refer to the Device Nomenclature table for information about legacy and new chip orderables

2 Applications

• Servo & stepper drives

• Battery chargers

• Portable instrumentation

• LED lighting

• Appliances

3 Description

The LM78L series (LM78Lxx throughout this document) of positive linear regulators is available with several fixed output voltages, making the devices useful in a wide range of applications. Used as a Zener-diode and resistor combination replacement, the LM78Lxx typically 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, industrial power delivery and more.

The LM78Lxx with new chip is available in SOIC (D) package and SOT-89 (PK) package. The LM78Lxx series regulators can deliver up to 100mA output current. Current limiting is included to limit the peak output current to a safe value. If internal power dissipation is too high, the thermal shutdown circuit prevents the IC from overheating.