Overview
The L78L05ACZTR is a three-terminal positive voltage regulator from STMicroelectronics. This component is part of the L78L series, which is known for its robust features such as internal current limiting and thermal shutdown, making it highly reliable and essentially indestructible. The L78L05ACZTR is designed to provide a fixed output voltage of 5V and can deliver up to 100 mA of output current. It is suitable for a wide range of applications, including local or on-card regulation to eliminate noise and distribution problems associated with single-point regulation.
Key Specifications
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| Output Voltage (VO) | 4.8 | 5 | 5.2 | V |
| Output Current (IO) | - | - | 100 | mA |
| Line Regulation (∆VO) | - | - | 150 mV | - |
| Load Regulation (∆VO) | - | - | 60 mV | - |
| Quiescent Current (Id) | - | 6 | 5.5 | mA |
| Output Noise Voltage (eN) | - | - | 70 µV | - |
| Supply Voltage Rejection (SVR) | - | - | 37 dB | - |
| Dropout Voltage (Vd) | - | - | 1.7 V | - |
| Operating Temperature | -40 | - | 125 | °C |
Key Features
- Output current up to 100 mA
- Fixed output voltage of 5V
- Internal current limiting and thermal shutdown for enhanced reliability
- Short-circuit protection
- No external components required
- Available in either ± 4% (A) or ± 8% (C) selection
- Low quiescent current and low noise
Applications
- Local or on-card regulation to eliminate noise and distribution problems
- Replacement for Zener diode/resistor combinations
- Industrial applications
- Use with power pass elements to make high-current voltage regulators
Q & A
- What is the output voltage of the L78L05ACZTR?
The output voltage of the L78L05ACZTR is 5V.
- What is the maximum output current of the L78L05ACZTR?
The maximum output current is up to 100 mA.
- Does the L78L05ACZTR have internal current limiting and thermal shutdown?
Yes, it does. These features make it highly reliable and essentially indestructible.
- What is the operating temperature range of the L78L05ACZTR?
The operating temperature range is from -40°C to 125°C.
- Does the L78L05ACZTR require external components?
No, it does not require any external components.
- What are the typical applications of the L78L05ACZTR?
It is used for local or on-card regulation, as a replacement for Zener diode/resistor combinations, and in industrial applications.
- What is the quiescent current of the L78L05ACZTR?
The quiescent current is typically 6 mA at 25°C.
- What is the dropout voltage of the L78L05ACZTR?
The dropout voltage is 1.7 V.
- Is the L78L05ACZTR available in different tolerance selections?
Yes, it is available in either ± 4% (A) or ± 8% (C) selection.
- Can the L78L05ACZTR be used to make high-current voltage regulators?
Yes, it can be used with power pass elements to make high-current voltage regulators.
