Overview
The LD1086DT80TR is a low drop voltage regulator produced by STMicroelectronics. It is capable of providing up to 1.5 A of output current and features a maximum dropout voltage of 1.2 V at the maximum output current, decreasing at lower loads. This regulator is pin-to-pin compatible with older 3-terminal adjustable regulators but offers better performance in terms of drop and output tolerance. Unlike PNP regulators, the LD1086's quiescent current flows into the load, increasing efficiency. The device requires only a 10 µF (minimum) capacitor for stability and is available in various packages including TO-220, D²PAK, D²PAK/A, DPAK, and DFN8 (4x4 mm).
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| DC Input Voltage | 30 | V |
| Output Current | Up to 1.5 A | A |
| Output Voltage (Fixed) | 1.8 V, 3.3 V, 5 V, 12 V | V |
| Output Tolerance | ± 1% at 25 °C, ± 2% in full temperature range | % |
| Typical Dropout Voltage | 1.3 V at 1.5 A | V |
| Operating Temperature Range | -40 °C to 125 °C | °C |
| Package Options | TO-220, D²PAK, D²PAK/A, DPAK, DFN8 (4x4 mm) | |
| Quiescent Current | 5 to 10 mA | mA |
| Thermal Resistance Junction-Case | 5 to 8 °C/W (depending on package) | °C/W |
Key Features
- Three-terminal adjustable or fixed output voltage: 1.8 V, 2.5 V, 3.3 V, 5 V, 12 V.
- Output current guaranteed up to 1.5 A.
- Typical dropout voltage of 1.3 V at 1.5 A.
- Internal power and thermal limit.
- Wide operating temperature range: -40 °C to 125 °C.
- Pinout compatibility with standard adjustable voltage regulators.
- Automotive grade available for adjustable output voltages in TO-220 and DPAK packages.
- On-chip trimming for tight output voltage tolerance within ± 1% at 25 °C.
Applications
The LD1086DT80TR is suitable for a variety of applications requiring stable and efficient voltage regulation. These include:
- Automotive systems: Due to its automotive grade certification in TO-220 and DPAK packages, it is ideal for use in vehicle electronics.
- Industrial control systems: The wide operating temperature range and high current capability make it suitable for industrial environments.
- Consumer electronics: It can be used in various consumer devices requiring reliable voltage regulation.
- Power supplies: The regulator's low dropout voltage and high current output make it a good choice for power supply designs.
Q & A
- What is the maximum output current of the LD1086DT80TR? The maximum output current is up to 1.5 A.
- What are the available output voltages for the LD1086DT80TR? The available fixed output voltages are 1.8 V, 3.3 V, 5 V, and 12 V.
- What is the typical dropout voltage of the LD1086DT80TR? The typical dropout voltage is 1.3 V at 1.5 A.
- What is the operating temperature range of the LD1086DT80TR? The operating temperature range is -40 °C to 125 °C.
- What packages are available for the LD1086DT80TR? The device is available in TO-220, D²PAK, D²PAK/A, DPAK, and DFN8 (4x4 mm) packages.
- Is the LD1086DT80TR automotive grade certified? Yes, it is certified for automotive use in TO-220 and DPAK packages.
- What is the quiescent current of the LD1086DT80TR? The quiescent current is between 5 to 10 mA.
- Does the LD1086DT80TR have internal power and thermal limits? Yes, it has internal power and thermal limits.
- How much capacitor is needed for stability? A minimum of 10 µF capacitor is needed for stability.
- Is the LD1086DT80TR pin-to-pin compatible with older 3-terminal adjustable regulators? Yes, it is pin-to-pin compatible but offers better performance.
