Overview
The LD1085P, produced by STMicroelectronics, is a low drop positive voltage regulator that offers both adjustable and fixed output voltage options. This regulator is capable of providing up to 3 A of output current, making it suitable for a wide range of applications requiring stable and efficient voltage regulation. The LD1085P is known for its high performance, including a low dropout voltage of 1.3 V at 3 A, and a tight output voltage tolerance of ±1% at 25 °C and ±2% over the full temperature range. It is available in several package types, including TO-220, TO-220FP, D²PAK, and D²PAK/A, ensuring flexibility in design and implementation.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Current | Up to 3 A | A |
| Dropout Voltage | 1.3 V (at 3 A) | V |
| Output Voltage Tolerance | ±1% at 25 °C, ±2% in full temperature range | % |
| Input Voltage Range | 4.25 V to 30 V | V |
| Operating Temperature Range | -40 °C to 125 °C | °C |
| Thermal Resistance Junction-Case | 3 °C/W (TO-220), 5 °C/W (TO-220FP), 3 °C/W (D²PAK), 5 °C/W (D²PAK/A) | °C/W |
| Thermal Resistance Junction-Ambient | 50 °C/W (TO-220), 60 °C/W (TO-220FP), 62.5 °C/W (D²PAK), 62.5 °C/W (D²PAK/A) | °C/W |
| Quiescent Current | 5 mA to 10 mA | mA |
| Short-Circuit Current | 3.2 A to 4.5 A (VI - VO = 5 V), 0.2 A to 0.5 A (VI - VO = 25 V) | A |
| Supply Voltage Rejection | 60 dB to 72 dB | dB |
Key Features
- Low Dropout Voltage: Guaranteed at a maximum of 1.3 V at 3 A, ensuring efficient voltage regulation.
- High Output Current: Capable of providing up to 3 A of output current.
- Tight Output Voltage Tolerance: ±1% at 25 °C and ±2% over the full temperature range.
- Internal Power and Thermal Limit: Built-in protection against overheating and overcurrent.
- Wide Operating Temperature Range: Operates from -40 °C to 125 °C.
- Multiple Package Options: Available in TO-220, TO-220FP, D²PAK, and D²PAK/A packages.
- Pinout Compatibility: Compatible with standard adjustable voltage regulators.
- Low Quiescent Current: Quiescent current flows into the load, increasing efficiency.
Applications
- Power Supplies: Ideal for use in power supplies requiring high current and low dropout voltage.
- Industrial Control Systems: Suitable for industrial control systems that need stable and efficient voltage regulation.
- Automotive Systems: Can be used in automotive systems due to its wide operating temperature range.
- Consumer Electronics: Applicable in various consumer electronics requiring reliable voltage regulation.
- Telecommunications: Used in telecommunications equipment for stable power supply.
Q & A
- What is the maximum output current of the LD1085P?
The LD1085P can provide up to 3 A of output current.
- What is the typical dropout voltage of the LD1085P?
The typical dropout voltage is 1.3 V at 3 A.
- What is the output voltage tolerance of the LD1085P?
The output voltage tolerance is ±1% at 25 °C and ±2% over the full temperature range.
- What are the available package types for the LD1085P?
The LD1085P is available in TO-220, TO-220FP, D²PAK, and D²PAK/A packages.
- What is the operating temperature range of the LD1085P?
The operating temperature range is from -40 °C to 125 °C.
- What is the maximum input voltage for the LD1085P?
The maximum input voltage is 30 V.
- Does the LD1085P have built-in thermal protection?
Yes, it has internal power and thermal limit protection.
- How much quiescent current does the LD1085P consume?
The quiescent current ranges from 5 mA to 10 mA.
- What is the supply voltage rejection of the LD1085P?
The supply voltage rejection is 60 dB to 72 dB.
- Is the LD1085P pinout compatible with other voltage regulators?
Yes, it is pinout compatible with standard adjustable voltage regulators.
