Overview
The LD1086V18 is a low drop voltage regulator produced by STMicroelectronics. This component is designed to provide up to 1.5 A of output current and is available in various packages, including TO-220, D²PAK, D²PAK/A, DPAK, and DFN8 (4x4 mm). It is pin-to-pin compatible with older 3-terminal adjustable voltage regulators but offers improved performance in terms of dropout voltage and output tolerance. The LD1086V18 is suitable for both automotive and industrial applications due to its wide operating temperature range and high accuracy.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Voltage | 1.8 V (fixed for LD1086V18) | V |
| Output Current | Up to 1.5 A | A |
| Dropout Voltage | Typical 1.3 V at 1.5 A | V |
| Output Tolerance | ± 1% at 25 °C, ± 2% in full temperature range | % |
| Quiescent Current | 5 to 10 mA | mA |
| Operating Temperature Range | -40 °C to 125 °C | °C |
| Package Options | TO-220, D²PAK, D²PAK/A, DPAK, DFN8 (4x4 mm) | |
| Thermal Resistance Junction-Case | 5 °C/W (TO-220), 3 °C/W (D²PAK), 8 °C/W (D²PAK/A), 1.5 °C/W (DPAK) | °C/W |
| Thermal Resistance Junction-Ambient | 50 °C/W (TO-220), 62.5 °C/W (D²PAK), 100 °C/W (D²PAK/A), 33 °C/W (DPAK) | °C/W |
Key Features
- Low dropout voltage: Typical 1.3 V at 1.5 A, maximum 1.2 V at full load.
- High accuracy output voltage: ± 1% at 25 °C and ± 2% over the full temperature range.
- 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.
- Efficient operation: Quiescent current flows into the load, increasing efficiency.
- Minimum stability capacitor requirement: 10 µF.
- Automotive grade available for adjustable output voltages in TO-220 and DPAK packages.
Applications
The LD1086V18 is versatile and can be used in various applications, including:
- Automotive systems: Qualified according to the AEC-Q100 specification, making it suitable for automotive environments.
- Industrial power supplies: High accuracy and reliability make it ideal for industrial power supply systems.
- Embedded systems: Suitable for use in embedded systems requiring stable and efficient voltage regulation.
- Consumer electronics: Can be used in consumer electronics that require reliable and efficient power management.
Q & A
- What is the maximum output current of the LD1086V18? The LD1086V18 can provide up to 1.5 A of output current.
- What are the available output voltages for the LD1086 series? The LD1086 series offers fixed output voltages of 1.8 V, 2.5 V, 3.3 V, 5 V, and 12 V, with the LD1086V18 specifically providing 1.8 V.
- What is the typical dropout voltage of the LD1086V18 at full load? The typical dropout voltage is 1.3 V at 1.5 A.
- What is the operating temperature range of the LD1086V18? The operating temperature range is -40 °C to 125 °C.
- What packages are available for the LD1086V18? The LD1086V18 is available in TO-220, D²PAK, D²PAK/A, DPAK, and DFN8 (4x4 mm) packages.
- Is the LD1086V18 suitable for automotive applications? Yes, it is qualified according to the AEC-Q100 specification for automotive use.
- What is the minimum capacitor required for stability? A minimum of 10 µF capacitor is required for stability.
- How does the quiescent current of the LD1086V18 affect efficiency? The quiescent current flows into the load, increasing efficiency compared to PNP regulators where part of the output current is wasted as quiescent current.
- What is the thermal resistance junction-case for the TO-220 package? The thermal resistance junction-case for the TO-220 package is 5 °C/W.
- Is the LD1086V18 pin-to-pin compatible with older 3-terminal adjustable regulators? Yes, it is pin-to-pin compatible but offers better performance in terms of drop and output tolerance.
