Overview
The LD1085D2M from STMicroelectronics is a high-accuracy, low-drop positive voltage regulator designed for use in automotive and industrial applications. This regulator is capable of providing up to 3 A of output current and is available in various packages including TO-220, TO-220FP, D²PAK, and D²PAK/A. It offers improved performance over older 3-terminal adjustable regulators with better dropout voltage and output tolerance.
Key Specifications
| Parameter | Test Condition | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|
| Output Voltage (VO) | IO = 0 mA, TJ = 25°C | 1.782 (1.8 V version) | 1.8 (1.8 V version) | 1.818 (1.8 V version) | V |
| Output Current (IO) | 3 A | A | |||
| Dropout Voltage (Vd) | IO = 3 A | 1.3 | 1.5 | V | |
| Quiescent Current (Iq) | VI ≤ 30 V | 5 | 10 | mA | |
| Line Regulation (ΔVO) | IO = 0 mA, VI = 3.4 to 18 V, TJ = 25°C | 0.2 | 4 | mV | |
| Load Regulation (ΔVO) | IO = 0 to 3 A, TJ = 25°C | 2 | 10 | mV | |
| Operating Temperature Range | -40 | 125 | °C | ||
| Thermal Resistance Junction-Ambient (RthJA) | TO-220 | 50 | °C/W |
Key Features
- Low Dropout Voltage: Typical dropout voltage of 1.3 V at 3 A output current.
- 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 output voltage.
- High Accuracy: Output voltage tolerance of ±1% at 25°C and ±2% over the full temperature range.
- Internal Protection: Internal power and thermal limiting, and short-circuit protection.
- Wide Operating Temperature Range: Operates from -40°C to 125°C.
- Efficient Operation: Quiescent current flows into the load, increasing efficiency.
- Package Options: Available in TO-220, TO-220FP, D²PAK, and D²PAK/A packages.
Applications
- Automotive Systems: Suitable for use in automotive applications due to its robust performance and wide operating temperature range.
- Industrial Equipment: Used in various industrial applications requiring reliable and high-accuracy voltage regulation.
- Power Supplies: Ideal for use in power supply units where low dropout voltage and high current output are necessary.
- Embedded Systems: Can be used in embedded systems that require stable and efficient voltage regulation.
Q & A
- What is the maximum output current of the LD1085D2M?
The LD1085D2M can provide up to 3 A of output current.
- What are the available fixed output voltages for the LD1085D2M?
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 LD1085D2M 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 LD1085D2M?
The operating temperature range is from -40°C to 125°C.
- Does the LD1085D2M have internal protection features?
Yes, it includes internal power and thermal limiting, and short-circuit protection.
- What packages is the LD1085D2M available in?
The LD1085D2M is available in TO-220, TO-220FP, D²PAK, and D²PAK/A packages.
- What is the quiescent current of the LD1085D2M?
The quiescent current is typically 5 mA to 10 mA when VI ≤ 30 V.
- How accurate is the output voltage of the LD1085D2M?
The output voltage tolerance is ±1% at 25°C and ±2% over the full temperature range.
- Is the LD1085D2M suitable for automotive applications?
Yes, it is suitable for automotive applications due to its robust performance and wide operating temperature range.
- What is the thermal resistance junction-ambient (RthJA) for the TO-220 package?
The thermal resistance junction-ambient (RthJA) for the TO-220 package is 50°C/W.
