Overview
The LD1086V from STMicroelectronics is a low-dropout voltage regulator designed to provide high efficiency and reliability in various applications. This monolithic integrated circuit (IC) is capable of delivering up to 1.5 A of output current and features adjustable or fixed output voltage versions. The regulator is known for its low dropout voltage, fast transient response, and low quiescent current, making it suitable for a wide range of applications including automotive, industrial, and consumer electronics sectors.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage - Max | 30 | V |
| Dropout Voltage - Max | 1.5 | V |
| Output Current - Max | 1.5 | A |
| Output Tolerance | ±1% at 25°C, ±2% in full temperature range | % |
| Operating Temperature Range | -40°C to +125°C | °C |
| Regulator Topology | Adjustable | |
| No. of Outputs | Single | |
| Load Regulation | 0.1% to 0.3% (depending on conditions) | % |
| Line Regulation | 0.015% to 0.1% (depending on conditions) | % |
| Package Style | TO-220, D²PAK, D²PAK/A, DPAK, DFN8 (4x4) | |
| Mounting Method | Through Hole | |
| Quiescent Current | 5 to 10 mA | mA |
| Short Circuit Current | 1.5 to 2 A | A |
Key Features
- Adjustable or Fixed Output Voltage: Available in various fixed output voltages (e.g., 1.8 V, 3.3 V, 5 V) and adjustable versions.
- Low Dropout Voltage: Guaranteed maximum dropout voltage of 1.2 V at 1.5 A output current.
- High Efficiency: Quiescent current flows into the load, increasing efficiency compared to traditional PNP regulators.
- Protection Features: Over-temperature, over-voltage, and over-current protection for enhanced reliability.
- Wide Operating Temperature Range: Operates effectively from -40°C to +125°C.
- PWM Control Capability: Suitable for speed and torque regulation in motor control applications.
- Compact Packaging: Available in TO-220, D²PAK, D²PAK/A, DPAK, and DFN8 (4x4) packages.
Applications
- Automotive Systems: Suitable for applications such as power window control, LED lighting, and other automotive electronics.
- Industrial Applications: Used in DC/DC converters and other industrial control systems requiring stable voltage regulation.
- Battery-Powered Devices: Ideal for battery-powered devices due to its low dropout voltage and high efficiency.
- LED Lighting: Provides a stable voltage supply necessary for LED lighting applications.
- Motor Control: Capable of driving motors in forward, reverse, brake, and high-impedance states with PWM control for speed and torque regulation.
Q & A
- What is the LD1086V?
The LD1086V is a low-dropout voltage regulator designed by STMicroelectronics, capable of providing up to 1.5 A of output current with adjustable or fixed output voltage versions.
- How does the LD1086V work?
The LD1086V regulates an input voltage to a stable and lower output voltage, even when the input voltage is close to the desired output voltage. It features low dropout voltage, thermal shutdown, and current limit protection.
- What are the key specifications of the LD1086V?
Key specifications include a maximum input voltage of 30 V, maximum dropout voltage of 1.5 V, maximum output current of 1.5 A, and an operating temperature range of -40°C to +125°C.
- What are the available package styles for the LD1086V?
The LD1086V is available in TO-220, D²PAK, D²PAK/A, DPAK, and DFN8 (4x4) packages.
- What are the protection features of the LD1086V?
The LD1086V includes over-temperature, over-voltage, and over-current protection for enhanced reliability.
- What are some typical applications of the LD1086V?
Typical applications include automotive systems, industrial control systems, battery-powered devices, LED lighting, and motor control applications.
- What are the pros and cons of using the LD1086V?
Pros include low dropout voltage, adjustable output, thermal shutdown and current limit protection, and wide operating temperature range. Cons include the need for external components for stability and potential high power dissipation requiring a heatsink.
- Are there any equivalents or alternatives to the LD1086V?
Alternatives include the LM2940 from Texas Instruments, the L4931 from STMicroelectronics, and the MIC29302 from Microchip Technology.
- How many pins does the LD1086V have and what are their functions?
The pinout configuration includes input voltage supply, regulated output voltage, adjust pin for adjusting the output voltage, and shutdown or enable pin for certain package variants.
- What is the quiescent current of the LD1086V?
The quiescent current of the LD1086V is between 5 to 10 mA.
