Overview
The L78L05ABUTR is a three-terminal positive voltage regulator manufactured by STMicroelectronics. This component is part of the L78L series and is designed to provide a reliable and versatile 5-volt power supply. It features thermal shutdown and internal current limiting, making it virtually unbreakable. The regulator is suitable for a wide range of applications due to its ability to produce currents up to 100mA with an adequate heat sink and its low-dropout (LDO) design.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Voltage | 4.8 - 5.2 | V |
| Output Current | Up to 100 mA | mA |
| Input Voltage Range | 7 to 20 V | V |
| Line Regulation | 100 - 150 mV | mV |
| Load Regulation | 30 - 60 mV | mV |
| Quiescent Current | 6 mA (TJ = 25°C), 5.5 mA (TJ = 125°C) | mA |
| Dropout Voltage | 1.7 V | V |
| Operating Temperature Range | -40 to 125°C | °C |
| Package | SOT-89-3 |
Key Features
- Voltage Regulation: Produces a constant output voltage despite variable input voltages within the specified range.
- Low Dropout Voltage: Ensures stable output voltage even when the input voltage is close to the output voltage.
- Internal Current Limiting: Prevents excessive current draw and protects the regulator.
- Thermal Overload Protection: Temporarily shuts down the regulator if the temperature exceeds a certain level to prevent damage.
- Short Circuit Protection: Limits output current in case of a short circuit.
- Low Quiescent Current: Consumes minimal quiescent current, making it suitable for power-sensitive applications.
- Wide Operating Temperature Range: Can be used in various environmental conditions due to its wide temperature range).
Applications
- Sensor Power Supply: Provides a steady and regulated power supply for sensors such as temperature, humidity, and environmental sensors).
- Digital Logic Circuits: Ensures proper operation of digital electronic circuits, especially those using low-power logic ICs).
- Voltage Reference for ADCs: Acts as a voltage reference for accurate analog-to-digital conversions in ADCs).
- Instrumentation Amplifiers: Provides a stable power source for precision instrumentation amplifiers).
- Voltage Divider Biasing: Can be used in voltage divider biasing applications due to its stable output voltage).
Q & A
- What is the output voltage of the L78L05ABUTR regulator?
The output voltage of the L78L05ABUTR regulator is 5 volts).
- What is the maximum output current of the L78L05ABUTR regulator?
The maximum output current of the L78L05ABUTR regulator is up to 100 mA with an adequate heat sink).
- What are the key protection features of the L78L05ABUTR regulator?
The key protection features include internal current limiting, thermal overload protection, and short circuit protection).
- What is the operating temperature range of the L78L05ABUTR regulator?
The operating temperature range is -40 to 125°C).
- What package options are available for the L78L05ABUTR regulator?
The L78L05ABUTR is available in the SOT-89-3 package).
- What are some common applications of the L78L05ABUTR regulator?
Common applications include sensor power supply, digital logic circuits, voltage reference for ADCs, instrumentation amplifiers, and voltage divider biasing).
- What is the dropout voltage of the L78L05ABUTR regulator?
The dropout voltage is 1.7 volts).
- Does the L78L05ABUTR regulator have low quiescent current?
Yes, the regulator consumes minimal quiescent current, making it suitable for power-sensitive applications).
- How does the L78L05ABUTR regulator handle thermal overload?
The regulator has internal thermal shutdown to prevent long-term damage from overheating).
- Can the L78L05ABUTR regulator be used in high-current applications?
Yes, by combining it with power pass components, it can create high-current voltage regulators).
