Overview
The L78L15ABUTR is a three-terminal positive voltage regulator from STMicroelectronics, part of the L78L series. These regulators are designed to provide fixed output voltages and are known for their robustness and ease of use. They feature internal current limiting and thermal shutdown, making them highly reliable and essentially indestructible when adequate heat-sinking is provided. The L78L15ABUTR specifically offers an output voltage of 15V and can deliver up to 100 mA of output current.
Key Specifications
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| Output Voltage (VO) | 13.8 | 15 | 16.2 | V |
| Input Voltage (VI) | - | - | 30 V (for VO = 3.3 to 9 V), 35 V (for VO = 12 to 15 V), 40 V (for VO = 18 to 24 V) | V |
| Output Current (IO) | - | - | 100 mA | mA |
| Quiescent Current (Id) | 6 | - | 6.5 mA | mA |
| Line Regulation (∆VO) | - | - | 300 mV (VI = 17.5 to 30 V, TJ = 25 °C) | mV |
| Load Regulation (∆VO) | - | - | 150 mV (IO = 1 to 100 mA, TJ = 25 °C) | mV |
| Output Noise Voltage (eN) | - | - | 90 µV (B = 10 Hz to 100 kHz, TJ = 25 °C) | µV |
| Supply Voltage Rejection (SVR) | - | - | 33 to 39 dB (VI = 18.5 to 28.5 V, f = 120 Hz, IO = 40 mA, TJ = 25 °C) | dB |
| Dropout Voltage (Vd) | - | - | 1.7 V | V |
| Operating Junction Temperature Range | -40 | - | 125 °C | °C |
Key Features
- Internal current limiting and thermal shutdown for enhanced reliability.
- No external components required for operation.
- Available in various output voltages: 3.3V, 5V, 6V, 8V, 9V, 10V, 12V, 15V, 18V, and 24V.
- Low quiescent current and low noise output.
- Can be used as a replacement for Zener diode/resistor combinations.
- Available in TO-92, SO-8, and SOT-89 packages.
Applications
- Local or on-card voltage regulation to eliminate noise and distribution problems associated with single-point regulation.
- Use with power pass elements to create high-current voltage regulators.
- Replacement for Zener diode/resistor combinations in various circuits.
- General-purpose voltage regulation in a wide range of electronic devices.
Q & A
- What is the maximum output current of the L78L15ABUTR?
The maximum output current is up to 100 mA.
- What are the available output voltages for the L78L series?
The available output voltages are 3.3V, 5V, 6V, 8V, 9V, 10V, 12V, 15V, 18V, and 24V.
- Does the L78L15ABUTR require any external components for operation?
No, the L78L15ABUTR does not require any external components for operation.
- What is the quiescent current of the L78L15ABUTR?
The quiescent current is typically 6 mA at 25°C and 6.5 mA at 125°C.
- What is the dropout voltage of the L78L15ABUTR?
The dropout voltage is 1.7 V.
- What are the package options for the L78L series?
The L78L series is available in TO-92, SO-8, and SOT-89 packages.
- What is the operating junction temperature range for the L78L15ABUTR?
The operating junction temperature range is -40°C to 125°C.
- How does the L78L15ABUTR protect against thermal overload?
The L78L15ABUTR features internal thermal shutdown to protect against thermal overload.
- Can the L78L15ABUTR be used in high-current applications?
Yes, it can be used with power pass elements to create high-current voltage regulators.
- What is the typical output noise voltage of the L78L15ABUTR?
The typical output noise voltage is 90 µV (B = 10 Hz to 100 kHz, TJ = 25 °C).
