Overview
The L7915CP is a three-terminal negative voltage regulator produced by STMicroelectronics. It is part of the L79 series, which is available in various packages including TO-220, TO-220FP, and D²PAK. This regulator is designed to provide a fixed negative output voltage of -15V and can deliver up to 1.5A of output current. It is particularly useful in applications requiring local on-card regulation and is suited for split power supplies, offering the same voltage options as the L78 positive standard series.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Voltage | -14.7 to -15.3 | V |
| Output Current | Up to 1.5 A | A |
| Input Voltage | -18.5 to -30 V | V |
| Dropout Voltage | 1.1 V | V |
| Quiescent Current | 3 mA | mA |
| Thermal Resistance (Junction-Case) | 5 °C/W | °C/W |
| Thermal Resistance (Junction-Ambient) | 60 °C/W | °C/W |
| Operating Junction Temperature | 0 to 150 °C | °C |
| Storage Temperature Range | -65 to 150 °C | °C |
| Short Circuit Current | 0.7 A | A |
| Output Noise Voltage | 250 µV | µV |
| Supply Voltage Rejection | 54 to 60 dB | dB |
Key Features
- Fixed negative output voltage of -15V
- Output current up to 1.5A
- Thermal overload protection
- Short-circuit protection
- Output SOA (Safe Operating Area) protection
- Low dropout voltage (1.1V at 1A)
- High supply voltage rejection (54 to 60 dB at 120 Hz)
- Low output noise voltage (250 µV)
- Available in TO-220, TO-220FP, and D²PAK packages
Applications
The L7915CP is suitable for a wide range of applications, including:
- Local on-card regulation to eliminate distribution problems associated with single point regulation
- Split power supplies, particularly where both positive and negative voltages are required
- Industrial and consumer electronics where stable negative voltage regulation is necessary
- Power supplies for audio and video equipment
- Regulation in automotive and aerospace systems
Q & A
- What is the output voltage of the L7915CP? The output voltage of the L7915CP is -15V.
- What is the maximum output current of the L7915CP? The maximum output current is up to 1.5A.
- What are the available packages for the L7915CP? The L7915CP is available in TO-220, TO-220FP, and D²PAK packages.
- What is the dropout voltage of the L7915CP? The dropout voltage is 1.1V at 1A.
- Does the L7915CP have thermal protection? Yes, it has thermal overload protection.
- What is the quiescent current of the L7915CP? The quiescent current is 3 mA.
- What is the operating junction temperature range for the L7915CP? The operating junction temperature range is 0 to 150 °C.
- Can the L7915CP be used in split power supplies? Yes, it is particularly suited for split power supplies.
- What is the supply voltage rejection of the L7915CP? The supply voltage rejection is 54 to 60 dB at 120 Hz.
- Is the L7915CP protected against short circuits? Yes, it has short-circuit protection.
