Overview
The L7912ACD2T-TR is a three-terminal negative voltage regulator from STMicroelectronics, part of the L79 series. This regulator is available in a D²PAK package and is designed to provide a fixed output voltage of -12V. It is suitable for a wide range of applications, particularly in systems requiring local on-card regulation and split power supplies. The L7912ACD2T-TR can deliver up to 1.5 A of output current if adequate heat sinking is provided, making it a reliable choice for various electronic circuits.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Voltage | -11.75 to -12.25 | V |
| Output Current | Up to 1.5 A | A |
| Input Voltage Range | -15.5 to -27 V | V |
| Quiescent Current | 3 mA | mA |
| Dropout Voltage | 1.1 V | V |
| Short Circuit Current | 1.5 A | A |
| Thermal Resistance Junction-Case | 3 °C/W | °C/W |
| Thermal Resistance Junction-Ambient | 62.5 °C/W | °C/W |
| Storage Temperature Range | -65 to 150 °C | °C |
| Operating Junction Temperature Range | 0 to 125 °C | °C |
Key Features
- Output current up to 1.5 A
- Fixed output voltage of -12V
- Thermal overload protection
- Short-circuit protection
- Output SOA (Safe Operating Area) protection
- Output tolerance of 2% at 25 °C for AC version
- Can be used with external components for adjustable voltages and currents
Applications
The L7912ACD2T-TR is particularly suited for applications requiring local on-card regulation and split power supplies. It is useful in a variety of electronic systems, including but not limited to:
- Power supplies for electronic equipment
- Audio and video equipment
- Industrial control systems
- Medical devices
- Automotive electronics
Q & A
- What is the output voltage of the L7912ACD2T-TR? The output voltage is -12V.
- What is the maximum output current of the L7912ACD2T-TR? The maximum output current is up to 1.5 A.
- What are the package options for the L79 series? The L79 series is available in TO-220, TO-220FP, and D²PAK packages.
- Does the L7912ACD2T-TR have thermal protection? Yes, it has thermal overload protection.
- What is the quiescent current of the L7912ACD2T-TR? The quiescent current is 3 mA at 25 °C.
- What is the dropout voltage of the L7912ACD2T-TR? The dropout voltage is 1.1 V.
- Can the L7912ACD2T-TR be used for adjustable voltage regulation? Yes, it can be used with external components to obtain adjustable voltages and currents.
- What is the operating junction temperature range for the L7912ACD2T-TR? The operating junction temperature range is 0 to 125 °C.
- What is the thermal resistance junction-case for the D²PAK package? The thermal resistance junction-case is 3 °C/W.
- What are some common applications of the L7912ACD2T-TR? It is commonly used in power supplies, audio and video equipment, industrial control systems, medical devices, and automotive electronics.
