Overview
The L78L15ACD13TR is a three-terminal positive voltage regulator from STMicroelectronics, part of the L78L series. This regulator is designed to provide a fixed output voltage of 15V and is known for its robustness and reliability. It features internal current limiting and thermal shutdown, making it essentially indestructible when adequate heat-sinking is provided. The L78L15ACD13TR 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 | Value | Unit |
|---|---|---|
| Output Voltage | 15 V | V |
| Output Current | 100 mA | mA |
| Input Voltage (Min) | 17 V | V |
| Input Voltage (Max) | 35 V | V |
| Line Regulation | 300 mV (VI = 17.5 to 30 V, TJ = 25°C) | mV |
| Load Regulation | 150 mV (IO = 1 to 100 mA, TJ = 25°C) | mV |
| Quiescent Current | 6.5 mA (TJ = 25°C), 6 mA (TJ = 125°C) | mA |
| Output Noise Voltage | 90 µV (B = 10 Hz to 100 kHz, TJ = 25°C) | µV |
| Supply Voltage Rejection | 33 to 39 dB (VI = 18.5 to 28.5 V, f = 120 Hz, IO = 40 mA, TJ = 25°C) | dB |
| Dropout Voltage | 1.7 V | V |
| Operating Junction Temperature Range | 0 to 125 °C | °C |
| Storage Temperature Range | -65 to 150 °C | °C |
| Package Type | SO-8 | - |
Key Features
- Internal Current Limiting and Thermal Shutdown: Ensures the regulator is essentially indestructible when adequate heat-sinking is provided.
- Fixed Output Voltage: Provides a stable output voltage of 15V.
- No External Components Required: Simplifies the design and reduces the need for additional components.
- Low Quiescent Current: Minimizes power consumption in standby mode.
- Low Noise: Offers improved noise performance compared to Zener diode/resistor combinations.
- High Supply Voltage Rejection: Effective in rejecting supply voltage variations.
- Compact SO-8 Package: Suitable for surface-mount applications.
Applications
- Local or On-Card Regulation: Eliminates noise and distribution problems associated with single-point regulation.
- Power Pass Elements: Can be used with power pass elements to create high-current voltage regulators.
- Zener Diode/Resistor Replacement: Offers improvements over traditional Zener diode/resistor combinations.
- General Power Supply Applications: Suitable for various power supply designs requiring a stable 15V output.
Q & A
- What is the output voltage of the L78L15ACD13TR?
The output voltage of the L78L15ACD13TR is 15V.
- What is the maximum output current of the L78L15ACD13TR?
The maximum output current is 100 mA.
- What is the minimum input voltage required for the L78L15ACD13TR?
The minimum input voltage is 17 V.
- Does the L78L15ACD13TR have internal current limiting and thermal shutdown?
- What is the quiescent current of the L78L15ACD13TR at 25°C?
The quiescent current at 25°C is 6.5 mA.
- What is the dropout voltage of the L78L15ACD13TR?
The dropout voltage is 1.7 V.
- What is the operating junction temperature range for the L78L15ACD13TR?
The operating junction temperature range is 0 to 125 °C.
- What package type is the L78L15ACD13TR available in?
The L78L15ACD13TR is available in an SO-8 package.
- Can the L78L15ACD13TR be used as a replacement for Zener diode/resistor combinations?
- What are some common applications of the L78L15ACD13TR?
