Overview
The L78L05CD13TR is a three-terminal positive voltage regulator from STMicroelectronics. This component is part of the L78L series, which is known for its robust design, incorporating internal current limiting and thermal shutdown, making it essentially indestructible. The L78L05CD13TR is designed to provide a fixed output voltage of 5 volts and can deliver up to 100 mA of output current, provided an adequate heat sink is used. 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 | Test Conditions | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|
| Output Voltage (VO) | TJ = 25 °C | 4.8 | 5 | 5.2 | V |
| Line Regulation (∆VO) | VI = 6.3 to 20 V, TJ = 25 °C | - | - | 100 mV | mV |
| Load Regulation (∆VO) | IO = 1 to 40 mA, TJ = 25 °C | - | - | 40 mV | mV |
| Quiescent Current (Id) | TJ = 25 °C | - | 6 | - | mA |
| Output Noise Voltage (eN) | B = 10 Hz to 100 kHz, TJ = 25 °C | - | - | 40 µV | µV |
| Supply Voltage Rejection (SVR) | VI = 6.3 to 16.3 V, f = 120 Hz, IO = 40 mA, TJ = 25 °C | - | - | 41 - 49 dB | dB |
| Dropout Voltage (Vd) | - | - | - | 2 V | V |
Key Features
- Output current up to 100 mA
- Fixed output voltage of 5 volts
- Internal current limiting and thermal shutdown for robust operation
- Short-circuit protection
- No external components required
- Available in either ± 4% (A) or ± 8% (C) selection
Applications
The L78L05CD13TR is suitable for various applications, including:
- Local or on-card voltage regulation to eliminate noise and distribution problems associated with single-point regulation.
- Replacement for Zener diode/resistor combinations, offering lower quiescent current and noise.
- Use with power pass elements to create high-current voltage regulators.
- Industrial and commercial power supply systems.
Q & A
- What is the output voltage of the L78L05CD13TR?
The output voltage of the L78L05CD13TR is 5 volts.
- What is the maximum output current of the L78L05CD13TR?
The maximum output current is up to 100 mA, provided an adequate heat sink is used.
- Does the L78L05CD13TR have built-in protection features?
- Do I need external components to use the L78L05CD13TR?
No, the L78L05CD13TR does not require any external components.
- What are the operating temperature ranges for the L78L05CD13TR?
The operating temperature range is typically from 0 to 125 °C.
- What is the quiescent current of the L78L05CD13TR at 25 °C?
The quiescent current at 25 °C is 6 mA.
- What is the dropout voltage of the L78L05CD13TR?
The dropout voltage is 2 V.
- How does the L78L05CD13TR perform in terms of noise?
The output noise voltage is 40 µV over the frequency range of 10 Hz to 100 kHz at 25 °C.
- Can the L78L05CD13TR be used in high-current applications?
- What are the typical applications of the L78L05CD13TR?
