Overview
The L7912CV 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 local on-card regulation, eliminating the distribution problems associated with single-point regulation. It can deliver an output current of up to 1.5 A, making it suitable for a wide range of applications. Although primarily designed as a fixed voltage regulator, it can also be used with external components to obtain adjustable voltages and currents.
Key Specifications
| Parameter | Value |
|---|---|
| Output Voltage | -12 VDC |
| Output Current | Up to 1.5 A |
| Input Voltage Range | -14.5 to -35 V |
| Package | TO-220 |
| Operating Temperature Range | 0 to 150 °C |
| Mounting Type | Through-Hole (THT) |
| Polarity | Negative |
| Dropout Voltage | 1.1 V (at IO = 1 A, TJ = 25 °C) |
| Short Circuit Current | 1.8 A |
| Supply Voltage Rejection | 54 to 60 dB (ΔVI = 10 V, f = 120 Hz) |
| Output Noise Voltage | 250 µV (B = 10 Hz to 100 kHz, TJ = 25 °C) |
Key Features
- Output current up to 1.5 A
- Thermal overload protection
- Short circuit protection
- Output transition SOA (Safe Operating Area) protection
- Fixed output voltage of -12 VDC
- Can be used with external components to obtain adjustable voltages and currents
- Available in TO-220, TO-220FP, and D²PAK packages
Applications
The L7912CV is particularly suited for a variety of applications, including:
- Local on-card regulation to eliminate distribution problems associated with single-point regulation
- Split power supplies (e.g., ±15 V - 1 A)
- High current negative regulators (e.g., -5 V / 4 A with 5 A current limiting)
- Power management in various electronic devices such as industrial equipment, automotive systems, and consumer electronics
Q & A
- What is the output voltage of the L7912CV regulator?
The output voltage of the L7912CV regulator is -12 VDC. - What is the maximum output current of the L7912CV?
The maximum output current of the L7912CV is up to 1.5 A. - What is the input voltage range for the L7912CV?
The input voltage range for the L7912CV is -14.5 to -35 V. - What type of protection does the L7912CV offer?
The L7912CV offers thermal overload protection, short circuit protection, and output transition SOA protection. - Can the L7912CV be used for adjustable voltages and currents?
Yes, the L7912CV can be used with external components to obtain adjustable voltages and currents. - What are the available packages for the L7912CV?
The L7912CV is available in TO-220, TO-220FP, and D²PAK packages. - What is the operating temperature range of the L7912CV?
The operating temperature range of the L7912CV is 0 to 150 °C. - Is the L7912CV RoHS compliant?
Yes, the L7912CV is RoHS compliant. - How does the L7912CV handle short circuits?
The L7912CV has built-in short circuit protection to handle such conditions. - What is the dropout voltage of the L7912CV?
The dropout voltage of the L7912CV is 1.1 V at IO = 1 A and TJ = 25 °C.
