Overview
The LD1085V50 is a low drop voltage regulator produced by STMicroelectronics. This regulator is capable of providing up to 3 A of output current and is available in both adjustable and fixed output voltage configurations. It is designed to offer improved performance over older 3-terminal adjustable regulators, with a guaranteed dropout voltage of 1.2 V at maximum output current, decreasing at lower loads. The device is pin-to-pin compatible with standard adjustable voltage regulators and features internal power and thermal limiting, ensuring reliable operation over a wide temperature range of -40°C to 125°C.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Current | Up to 3 A | A |
| Dropout Voltage | 1.3 V (typical at 3 A) | V |
| Output Voltage Tolerance | ± 1% at 25 °C, ± 2% in full temperature range | % |
| Operating Temperature Range | -40 °C to 125 °C | °C |
| Package Types | TO-220, TO-220FP, D²PAK, D²PAK/A | |
| 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 to 5 °C/W (depending on package) | °C/W |
| Thermal Resistance Junction-Ambient | 50 to 62.5 °C/W (depending on package) | °C/W |
Key Features
- Low Dropout Voltage: Guaranteed maximum dropout voltage of 1.2 V at 3 A, decreasing at lower loads.
- Adjustable and Fixed Output Voltage: Available in fixed output voltages of 1.8 V, 2.5 V, 3.3 V, and 5 V, and adjustable configurations.
- High Output Current: Capable of providing up to 3 A of output current.
- Tight Output Voltage Tolerance: ± 1% at 25 °C and ± 2% in the full temperature range.
- Internal Power and Thermal Limiting: Ensures reliable operation and prevents overheating.
- Wide Operating Temperature Range: Operates from -40 °C to 125 °C.
- Pin-to-Pin Compatibility: Compatible with older 3-terminal adjustable regulators.
- Low Quiescent Current: Quiescent current flows into the load, increasing efficiency.
- Minimal Capacitance Requirement: Only a 10 µF minimum capacitor is needed for stability.
Applications
The LD1085V50 is suitable for a variety of applications requiring high current and low dropout voltage, including:
- Automotive Systems: Due to its wide operating temperature range and robust design.
- Industrial Power Supplies: For applications needing reliable and efficient voltage regulation.
- Consumer Electronics: Where high current and low dropout voltage are critical.
- Telecommunication Equipment: For powering various components in telecom systems.
Q & A
- What is the maximum output current of the LD1085V50?
The LD1085V50 can provide up to 3 A of output current.
- What are the available fixed output voltages for the LD1085V50?
The fixed output voltages available are 1.8 V, 2.5 V, 3.3 V, and 5 V.
- What is the typical dropout voltage of the LD1085V50 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 LD1085V50?
The operating temperature range is from -40 °C to 125 °C.
- What packages are available for the LD1085V50?
The device is available in TO-220, TO-220FP, D²PAK, and D²PAK/A packages.
- What is the quiescent current of the LD1085V50?
The quiescent current is between 5 mA and 10 mA.
- Is the LD1085V50 RoHS compliant?
Yes, the LD1085V50 is RoHS compliant and comes in Ecopack2 packaging.
- What is the minimum capacitance required for stability?
A minimum of 10 µF capacitance is required for stability.
- Does the LD1085V50 have internal power and thermal limiting?
Yes, the device has internal power and thermal limiting to ensure reliable operation.
- Is the LD1085V50 pin-to-pin compatible with older 3-terminal adjustable regulators?
Yes, it is pin-to-pin compatible with older 3-terminal adjustable regulators.
