78L33 PDF Datasheet – 3.3V, Positive Voltage Regulator

This post explains for the Voltage Regulator.

The Part Number is 78L33.

The function of this semiconductor is Positive 3.3V, Voltage Regulator.

The package is TO-92 Type

Manufacturer: STMicroelectronics


78L33 Regulator


The 78L33 series of three-terminal positive regulators employ internal current limiting and thermal shutdown, making them essentially indestructible. If adequate heat-sink is provided, they can deliver up to 100 mA output current. They are intended as fixed voltage regulators in a wide range of applications including local or oncard regulation for elimination of noise and distribution problems associated with single-point regulation.

In addition, they can be used with power pass elements to make high-current voltage regulators. The L78L series used as Zener diode/resistor combination replacement, offers e improvement along with lower quiescent current and lower noise.

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78L33 image



1. Output current up to 100 mA

2. Output voltages of 3.3 V thermal overload protection

3. Short-circuit protection

4. No external components are required



78L33 Datasheet PDF