Overview
The LD1085D2M25R is a low drop positive 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. The LD1085 series, including the LD1085D2M25R, offers improved performance over older 3-terminal adjustable regulators, with a guaranteed dropout voltage of 1.2 V at maximum output current. The device is designed to be pin-to-pin compatible with standard adjustable voltage regulators but enhances efficiency by ensuring the quiescent current flows into the load rather than being wasted.
The LD1085D2M25R is specifically configured to provide a fixed output voltage of 2.5 V. It features on-chip trimming, which allows for a tight output voltage tolerance of ±1% at 25 °C. The regulator is supplied in a D²PAK package and operates over a wide temperature range of -40 °C to 125 °C.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Voltage | 2.5 | V |
| Output Current | Up to 3 | A |
| Dropout Voltage | 1.3 (typ), 1.5 (max) at 3 A | V |
| Output Tolerance | ±1% at 25 °C, ±2% in full temperature range | % |
| Line Regulation | 0.2 to 4 mV | mV |
| Load Regulation | 2 to 10 mV | mV |
| Quiescent Current | 5 to 10 mA | mA |
| Operating Temperature Range | -40 to 125 | °C |
| Package | D²PAK |
Key Features
- Typical dropout voltage of 1.3 V at 3 A
- Fixed output voltage of 2.5 V, with other configurations available (1.8 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 limiting
- Wide operating temperature range: -40 °C to 125 °C
- Available in TO-220, TO-220FP, D²PAK, and D²PAK/A packages
- Pinout compatibility with standard adjustable voltage regulators
- High efficiency due to quiescent current flowing into the load
- Minimum 10 µF capacitor required for stability
Applications
The LD1085D2M25R is suitable for a variety of applications requiring a stable and efficient voltage supply. These include:
- Industrial control systems
- Automotive electronics
- Consumer electronics
- Telecommunication equipment
- Medical devices
- Any system requiring a low dropout voltage regulator with high current capability
Q & A
- What is the maximum output current of the LD1085D2M25R?
The LD1085D2M25R can provide up to 3 A of output current.
- What is the typical dropout voltage of the LD1085D2M25R at 3 A output current?
The typical dropout voltage is 1.3 V at 3 A output current.
- What is the output voltage tolerance of the LD1085D2M25R at 25 °C?
The output voltage tolerance is ±1% at 25 °C.
- What packages are available for the LD1085 series?
The LD1085 series is available in TO-220, TO-220FP, D²PAK, and D²PAK/A packages.
- What is the operating temperature range of the LD1085D2M25R?
The operating temperature range is -40 °C to 125 °C.
- Is the LD1085D2M25R pin-to-pin compatible with older 3-terminal adjustable regulators?
- What is the minimum capacitor required for stability?
A minimum 10 µF capacitor is required for stability.
- What are the key advantages of the LD1085D2M25R over PNP regulators?
The LD1085D2M25R has higher efficiency because the quiescent current flows into the load, and it offers better performance in terms of drop and output tolerance.
- What is the line regulation of the LD1085D2M25R?
The line regulation is 0.2 to 4 mV.
- What is the load regulation of the LD1085D2M25R?
The load regulation is 2 to 10 mV.
