Overview
The LD1085D2M18R is a 3 A low drop positive voltage regulator produced by STMicroelectronics. It is available in various packages, including the D²PAK package for this specific model. This regulator is designed to provide adjustable or fixed output voltages, making it versatile for a range of applications. The LD1085 series is known for its high performance, including a low dropout voltage and tight output voltage tolerance, which enhances its efficiency and reliability.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Voltage | 1.8 V (fixed) | V |
| Output Current | Up to 3 A | A |
| Dropout Voltage | Typical 1.3 V at 3 A | V |
| Output Tolerance | ± 1% at 25 °C, ± 2% in full temperature range | % |
| Operating Temperature Range | -40 °C to 125 °C | °C |
| Package | D²PAK | |
| Quiescent Current | 5 to 10 mA | mA |
| Short-Circuit Current | 3.2 to 4.5 A (VI - VO = 5 V) | A |
| Thermal Resistance Junction-Case | 3 °C/W | °C/W |
| Thermal Resistance Junction-Ambient | 62.5 °C/W | °C/W |
Key Features
- Low dropout voltage: Typical 1.3 V at 3 A, ensuring high efficiency.
- Tight output voltage tolerance: ± 1% at 25 °C and ± 2% in full temperature range.
- High output current capability: Up to 3 A.
- Internal power and thermal limiting for protection.
- Wide operating temperature range: -40 °C to 125 °C.
- Pin-to-pin compatibility with standard adjustable voltage regulators.
- Low quiescent current that flows into the load, enhancing efficiency.
- Minimum 10 µF capacitor required for stability.
Applications
The LD1085D2M18R is suitable for a variety of applications requiring stable and efficient voltage regulation, such as:
- Power supplies for industrial and consumer electronics.
- Automotive systems requiring robust voltage regulation.
- Telecommunication equipment.
- Medical devices needing precise voltage control.
- Embedded systems and microcontrollers.
Q & A
- What is the maximum output current of the LD1085D2M18R?
The maximum output current is up to 3 A. - What is the typical dropout voltage of the LD1085D2M18R?
The typical dropout voltage is 1.3 V at 3 A. - What is the output voltage tolerance of the LD1085D2M18R?
The output voltage tolerance is ± 1% at 25 °C and ± 2% in the full temperature range. - What is the operating temperature range of the LD1085D2M18R?
The operating temperature range is -40 °C to 125 °C. - What package is the LD1085D2M18R available in?
The LD1085D2M18R is available in the D²PAK package. - How much quiescent current does the LD1085D2M18R consume?
The quiescent current is between 5 to 10 mA. - What is the minimum capacitor required for stability?
A minimum of 10 µF capacitor is required for stability. - Is the LD1085D2M18R pin-to-pin compatible with other regulators?
Yes, it is pin-to-pin compatible with standard adjustable voltage regulators. - What are some common applications of the LD1085D2M18R?
Common applications include power supplies, automotive systems, telecommunication equipment, medical devices, and embedded systems. - What is the thermal resistance junction-case of the LD1085D2M18R?
The thermal resistance junction-case is 3 °C/W.
