Overview
The LD1085D2M33R is a high-performance low-dropout (LDO) voltage regulator produced by STMicroelectronics. This device is designed to provide a stable 3.3V output with a maximum current capacity of 3A, making it ideal for powering sensitive electronics and microcontrollers. The regulator is housed in a compact D²PAK-3 package, which is suitable for applications requiring high efficiency and thermal performance.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Manufacturer | STMicroelectronics | |
| Part Number | LD1085D2M33R | |
| Package | D²PAK-3 | |
| Output Voltage | 3.3V | V |
| Maximum Output Current | 3A | A |
| Dropout Voltage (at 3A) | 1.3V (typ), 1.5V (max) | V |
| Input Voltage Range | 4.9V to 30V | V |
| Output Voltage Tolerance | ±1% at 25°C, ±2% in full temperature range | % |
| Operating Temperature Range | -40°C to 125°C | °C |
| Thermal Resistance Junction-Ambient | 62.5°C/W | °C/W |
| Quiescent Current | 5mA (typ), 10mA (max) | mA |
| Supply Voltage Rejection | 60dB to 72dB at 120Hz | dB |
Key Features
- High-performance low-dropout (LDO) voltage regulator with a fixed output voltage of 3.3V.
- Maximum output current of up to 3A.
- Low dropout voltage of 1.3V (typ) at 3A.
- Tight output voltage tolerance of ±1% at 25°C and ±2% in the full temperature range.
- Internal power and thermal limiting for enhanced reliability.
- Wide operating temperature range from -40°C to 125°C.
- Compact D²PAK-3 package suitable for high-efficiency and thermal performance applications.
- Pin-to-pin compatibility with standard adjustable voltage regulators but offers better performance in terms of drop and output tolerance.
- Low quiescent current that flows into the load, increasing efficiency.
- Minimum 10µF capacitor required for stability.
Applications
- Microcontroller Power Supplies: Ideal for powering microcontrollers and other low-voltage components.
- Battery-Powered Devices: Suitable for battery-powered applications requiring low power consumption.
- Consumer Electronics: Used in various consumer electronics for stable voltage regulation.
Q & A
- Q: What is the maximum output current of the LD1085D2M33R?
A: The LD1085D2M33R can provide up to 3A of output current.
- Q: Can the LD1085D2M33R regulate voltages other than 3.3V?
A: No, the LD1085D2M33R provides a fixed output voltage of 3.3V. For different voltage levels, you would need to choose an adjustable version or another model.
- Q: What is the typical dropout voltage of the LD1085D2M33R at 3A?
A: The typical dropout voltage is 1.3V at 3A.
- Q: What is the operating temperature range of the LD1085D2M33R?
A: The operating temperature range is from -40°C to 125°C.
- Q: What is the thermal resistance junction-ambient of the LD1085D2M33R in the D²PAK-3 package?
A: The thermal resistance junction-ambient is 62.5°C/W.
- Q: What is the quiescent current of the LD1085D2M33R?
A: The quiescent current is typically 5mA and can be up to 10mA.
- Q: What is the supply voltage rejection of the LD1085D2M33R at 120Hz?
A: The supply voltage rejection is between 60dB to 72dB at 120Hz.
- Q: What is the minimum capacitor value required for stability?
A: A minimum 10µF capacitor is required for stability.
- Q: Is the LD1085D2M33R RoHS compliant?
A: Yes, the LD1085D2M33R is RoHS compliant.
- Q: How do I connect the LD1085D2M33R in a circuit?
A: Connect the IN pin to your input voltage source, the OUT pin to the load that requires the regulated 3.3V, and the GND pin to the common ground of your circuit. Refer to the datasheet for recommended capacitor values and external components.
