Overview
The LD1085V, produced by STMicroelectronics, is a low drop positive voltage regulator capable of providing up to 3 A of output current. This regulator is available in both adjustable and fixed output voltage configurations, offering improved performance over older 3-terminal adjustable regulators. It features a maximum dropout voltage of 1.2 V at the maximum output current, which decreases at lower loads. The LD1085V is designed to enhance efficiency by ensuring that the quiescent current flows into the load, rather than being wasted. It requires a minimum 10 μF capacitor for stability and is supplied in various packages including TO-220, TO-220FP, D²PAK, and D²PAK/A.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Current | Up to 3 A | A |
| Dropout Voltage | Typical 1.3 V (at 3 A), Maximum 1.5 V | V |
| Output Voltage Tolerance | ± 1% at 25 °C, ± 2% in full temperature range | % |
| Output Voltage Options | 1.8 V, 2.5 V, 3.3 V, 5 V | V |
| Operating Temperature Range | -40 °C to 125 °C | °C |
| Package Options | TO-220, TO-220FP, D²PAK, D²PAK/A | |
| Thermal Resistance Junction-Case | 3 °C/W (TO-220), 5 °C/W (TO-220FP), 3 °C/W (D²PAK and D²PAK/A) | °C/W |
| Thermal Resistance Junction-Ambient | 50 °C/W (TO-220), 60 °C/W (TO-220FP), 62.5 °C/W (D²PAK and D²PAK/A) | °C/W |
Key Features
- Typical dropout voltage of 1.3 V at 3 A
- Three-terminal adjustable or fixed output voltage options: 1.8 V, 2.5 V, 3.3 V, 5 V
- Guaranteed output current up to 3 A
- Tight output voltage tolerance: ± 1% at 25 °C and ± 2% in full temperature range
- Internal power and thermal limit
- Wide operating temperature range: -40 °C to 125 °C
- Pinout compatibility with standard adjustable voltage regulators
- Efficient quiescent current that flows into the load
- Minimum 10 μF capacitor required for stability
Applications
The LD1085V is suitable for a variety of applications requiring a stable and efficient voltage supply. These include:
- Industrial control systems
- Automotive systems
- Consumer electronics
- Medical devices
- Telecommunication equipment
Q & A
- What is the maximum output current of the LD1085V?
The LD1085V can provide up to 3 A of output current.
- What are the available output voltage options for the LD1085V?
The LD1085V is available with fixed output voltages of 1.8 V, 2.5 V, 3.3 V, and 5 V, as well as an adjustable output voltage option.
- What is the typical dropout voltage of the LD1085V at 3 A output current?
The typical dropout voltage is 1.3 V at 3 A output current.
- What is the operating temperature range of the LD1085V?
The operating temperature range is -40 °C to 125 °C.
- What packages are available for the LD1085V?
The LD1085V is available in TO-220, TO-220FP, D²PAK, and D²PAK/A packages.
- What is the thermal resistance junction-case for the TO-220 package?
The thermal resistance junction-case for the TO-220 package is 3 °C/W.
- Does the LD1085V require any external components for stability?
Yes, a minimum 10 μF capacitor is required for stability.
- How does the quiescent current of the LD1085V affect efficiency?
The quiescent current of the LD1085V flows into the load, increasing efficiency by not wasting current as quiescent current.
- Is the LD1085V pinout compatible with older 3-terminal adjustable regulators?
Yes, the LD1085V is pin-to-pin compatible with older 3-terminal adjustable regulators.
- What is the output voltage tolerance of the LD1085V at 25 °C?
The output voltage tolerance is ± 1% at 25 °C.
