Overview
The L78L15ACZ is a three-terminal positive voltage regulator from STMicroelectronics, part of the L78L series. These regulators are designed to be highly robust, featuring internal current limiting and thermal shutdown, making them essentially indestructible. With adequate heat-sinking, they can deliver up to 100 mA of output current. The L78L series is intended for use as fixed voltage regulators in various applications, including local or on-card regulation to eliminate noise and distribution problems associated with single-point regulation. They can also be used with power pass elements to create high-current voltage regulators and as a replacement for Zener diode/resistor combinations, offering lower quiescent current and noise.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Current | Up to 100 | mA |
| Output Voltage | 15 | V |
| Input Voltage Range | 17.5 to 30 | V |
| Line Regulation | 300 mV (max) | - |
| Load Regulation | 100 mV (max) | - |
| Quiescent Current | 6 mA (typ) at 25°C | - |
| Output Noise Voltage | 80 µV (typ) at 10 Hz to 100 kHz | - |
| Supply Voltage Rejection | 39 dB (min) at 120 Hz | - |
| Dropout Voltage | 1.7 V (typ) | - |
| Operating Temperature Range | 0 to 125°C | - |
| Package Type | TO-92 | - |
Key Features
- Output current up to 100 mA
- Output voltage of 15 V with ± 4% (A) or ± 8% (C) selection
- Internal current limiting and thermal shutdown for robust operation
- Short-circuit protection and thermal overload protection
- No external components required
- Low quiescent current and low noise
- Available in TO-92 package
Applications
The L78L15ACZ is suitable for a wide range of applications, including:
- Local or on-card voltage regulation to eliminate noise and distribution problems
- Use with power pass elements to create high-current voltage regulators
- Replacement for Zener diode/resistor combinations
- Industrial applications requiring stable and reliable voltage regulation
Q & A
- What is the maximum output current of the L78L15ACZ?
The maximum output current is up to 100 mA.
- What are the available output voltages in the L78L series?
The L78L series offers output voltages of 3.3, 5, 6, 8, 9, 10, 12, 15, 18, and 24 V.
- Does the L78L15ACZ require external components for operation?
No, the L78L15ACZ does not require any external components for operation.
- What is the operating temperature range of the L78L15ACZ?
The operating temperature range is from 0 to 125°C.
- What type of protection does the L78L15ACZ have?
The L78L15ACZ has internal current limiting, thermal shutdown, and short-circuit protection.
- What is the typical quiescent current of the L78L15ACZ at 25°C?
The typical quiescent current is 6 mA at 25°C.
- What is the dropout voltage of the L78L15ACZ?
The dropout voltage is typically 1.7 V.
- What is the supply voltage rejection of the L78L15ACZ?
The supply voltage rejection is typically 39 dB at 120 Hz.
- In what package is the L78L15ACZ available?
The L78L15ACZ is available in the TO-92 package.
- Can the L78L15ACZ be used as a replacement for Zener diode/resistor combinations?
