Overview
The LD1084V12, produced by STMicroelectronics, is a low-drop positive voltage regulator capable of providing up to 5 A of output current. This regulator is known for its high performance and efficiency, making it suitable for a wide range of applications. It features a three-terminal adjustable output voltage and is pin-to-pin compatible with older 3-terminal adjustable regulators but offers improved performance in terms of dropout voltage and output tolerance. The LD1084V12 is supplied in a TO-220 package and operates over a wide temperature range from -40 °C to 125 °C.
Key Specifications
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| DC Input Voltage (VI) | - | - | 30 | V |
| Output Current (IO) | - | - | 5 | A |
| Dropout Voltage (Vd) | 1.3 | 1.5 | 1.5 | V |
| Reference Voltage (Vref) | 1.225 | 1.25 | 1.275 | V |
| Line Regulation | 0.015 | 0.2 | 0.2 | % |
| Load Regulation | 0.1 | 0.3 | 0.4 | % |
| Operating Junction Temperature | -40 | - | 125 | °C |
| Storage Temperature Range | -55 | - | 150 | °C |
| Thermal Resistance Junction-Case (RthJC) | - | - | 3 | °C/W |
| Thermal Resistance Junction-Ambient (RthJA) | - | - | 50 | °C/W |
Key Features
- Low Dropout Voltage: Guaranteed at a maximum of 1.5 V at the maximum output current, decreasing at lower loads.
- Adjustable Output Voltage: Three-terminal adjustable output voltage.
- High Output Current: Up to 5 A of output current.
- Tight Output Tolerance: ± 1% at 25 °C and ± 2% in the full temperature range.
- Internal Protection: Internal power and thermal limit protection.
- Wide Operating Temperature Range: From -40 °C to 125 °C.
- Package Compatibility: Supplied in TO-220 package, pin-to-pin compatible with standard adjustable VREG.
- Efficiency: Quiescent current flows into the load, increasing efficiency.
Applications
- Power Supplies: Suitable for use in various power supply applications requiring high current and low dropout voltage.
- Industrial Control Systems: Used in industrial control systems where stable and efficient voltage regulation is crucial.
- Automotive Systems: Can be used in automotive systems, though not recommended for safety-critical applications without specific designation.
- Consumer Electronics: Applicable in consumer electronics requiring reliable voltage regulation.
- Telecommunications: Used in telecommunications equipment for stable power supply.
Q & A
- What is the maximum output current of the LD1084V12?
The LD1084V12 can provide up to 5 A of output current.
- What is the typical dropout voltage of the LD1084V12?
The typical dropout voltage is 1.3 V at the maximum output current.
- What is the operating temperature range of the LD1084V12?
The operating temperature range is from -40 °C to 125 °C.
- Is the LD1084V12 adjustable?
Yes, the LD1084V12 has a three-terminal adjustable output voltage.
- What package is the LD1084V12 available in?
The LD1084V12 is supplied in a TO-220 package.
- What is the reference voltage of the LD1084V12?
The reference voltage (Vref) is typically 1.25 V.
- Does the LD1084V12 have internal protection features?
Yes, it has internal power and thermal limit protection.
- What is the thermal resistance junction-case (RthJC) of the LD1084V12?
The thermal resistance junction-case (RthJC) is 3 °C/W.
- Is the LD1084V12 compatible with older regulators?
Yes, it is pin-to-pin compatible with standard adjustable VREG.
- What is the minimum capacitor required for stability?
A minimum capacitor of 10 µF is needed for stability.
