Overview
The LD1085D2T12R is a low drop positive voltage regulator produced by STMicroelectronics. This component is capable of providing up to 3 A of output current and is available in various fixed output voltages, including 1.8 V, 2.5 V, 3.3 V, and 5 V, with the specific model LD1085D2T12R being adjustable but often configured for fixed outputs. It features a typical dropout voltage of 1.3 V at 3 A, making it efficient for a wide range of applications. The regulator is pin-to-pin compatible with older 3-terminal adjustable regulators but offers improved performance in terms of dropout voltage and output tolerance.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Voltage (Fixed) | 1.8 V, 2.5 V, 3.3 V, 5 V | V |
| Output Current | Up to 3 A | A |
| Dropout Voltage (Max) | 1.5 V @ 3 A | V |
| Input Voltage (Max) | 30 V | V |
| Output Tolerance | ± 1% at 25 °C, ± 2% in full temperature range | % |
| Operating Temperature Range | -40 °C to 125 °C | °C |
| Quiescent Current | 5 to 10 mA | mA |
| Thermal Resistance Junction-Case | 3 to 5 °C/W (depending on package) | °C/W |
| Package Types | TO-220, TO-220FP, D²PAK, D²PAK/A | - |
| Supply Voltage Rejection (PSRR) | 60 to 72 dB @ 120 Hz | dB |
Key Features
- Low Dropout Voltage: Typical dropout voltage of 1.3 V at 3 A, ensuring high efficiency.
- Adjustable and Fixed Output: Available in both adjustable and fixed output voltage configurations.
- High Output Current: Guaranteed output current up to 3 A.
- Tight Output Tolerance: Output voltage tolerance within ± 1% at 25 °C and ± 2% in full temperature range.
- Internal Protection: Features internal power and thermal limit protection.
- Wide Operating Temperature Range: Operates from -40 °C to 125 °C.
- Low Quiescent Current: Quiescent current flows into the load, increasing efficiency.
- High Supply Voltage Rejection: PSRR of 60 to 72 dB at 120 Hz.
Applications
- Power Supplies: Suitable for use in various power supply designs requiring high current and low dropout voltage.
- Industrial Control Systems: Used in industrial control systems where stable and efficient voltage regulation is crucial.
- Automotive Systems: Applicable in automotive systems due to its wide operating temperature range and robust protection features.
- Consumer Electronics: Employed in consumer electronics for reliable voltage regulation in high-current applications.
Q & A
- What is the maximum output current of the LD1085D2T12R?
The maximum output current of the LD1085D2T12R is up to 3 A.
- What are the available fixed output voltages for the LD1085 series?
The LD1085 series is available with fixed output voltages of 1.8 V, 2.5 V, 3.3 V, and 5 V.
- What is the typical dropout voltage of the LD1085D2T12R at 3 A?
The typical dropout voltage is 1.3 V at 3 A.
- What is the maximum input voltage for the LD1085D2T12R?
The maximum input voltage is 30 V.
- What are the package types available for the LD1085D2T12R?
The LD1085D2T12R is available in TO-220, TO-220FP, D²PAK, and D²PAK/A packages.
- What is the operating temperature range of the LD1085D2T12R?
The operating temperature range is from -40 °C to 125 °C.
- Does the LD1085D2T12R have internal protection features?
Yes, it features internal power and thermal limit protection.
- What is the quiescent current of the LD1085D2T12R?
The quiescent current is between 5 to 10 mA.
- What is the supply voltage rejection (PSRR) of the LD1085D2T12R?
The PSRR is 60 to 72 dB at 120 Hz.
- Is the LD1085D2T12R RoHS compliant?
Yes, the LD1085D2T12R is lead-free and RoHS compliant.
