Overview
The LD1085D2T25R is a low drop positive voltage regulator produced by STMicroelectronics. This component is part of the LD1085 series, known for its high performance and reliability. The LD1085D2T25R is capable of providing up to 3 A of output current and features adjustable and fixed output voltage options. It is particularly notable for its low dropout voltage, high output current capability, and tight output voltage tolerance.
This regulator is pin-to-pin compatible with standard adjustable voltage regulators but offers improved performance in terms of dropout voltage and output tolerance. It is suitable for a wide range of applications requiring stable and efficient voltage regulation.
Key Specifications
| Parameter | Test Conditions | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|
| Output Voltage (VO) | IO = 0 mA, TJ = 25°C | 2.475 | 2.5 | 2.525 | V |
| Output Voltage (VO) | IO = 0 to 3 A, VIN = 4.1 to 30 V | 2.45 | 2.5 | 2.55 | V |
| Line Regulation (∆VO) | VIN = 4.1 to 18 V, IO = 0 mA, TJ = 25°C | 0.2 | - | 5 | mV |
| Load Regulation (∆VO) | IO = 0 to 3 A, TJ = 25°C | 2 | - | 10 | mV |
| Dropout Voltage (Vd) | IO = 3 A | 1.3 | - | 1.5 | V |
| Quiescent Current (Id) | VIN ≤ 30 V | 5 | - | 10 | mA |
| Short-Circuit Current (Isc) | VIN - VO = 5 V | 3.2 | - | 4.5 | A |
| Thermal Regulation | TA = 25°C, 30 ms pulse | 0.008 | - | 0.04 | %/W |
| Supply Voltage Rejection (SVR) | IO = 3 A, f = 120 Hz, CO = 25 µF, VIN = 8.3 ± 3 V | 60 | - | 72 | dB |
| Output Noise Voltage (eN) | TA = 25°C, f = 10 Hz to 10 kHz | 0.003 | - | - | % |
| Operating Temperature | - | -40 | - | 125 | °C |
Key Features
- Low Dropout Voltage: Guaranteed at a maximum of 1.3 V at the maximum output current of 3 A.
- High Output Current: Capable of providing up to 3 A of output current.
- Tight Output Voltage Tolerance: ± 1% at 25°C and ± 2% in the full temperature range.
- Internal Protection: Features internal power and thermal limit protection.
- Wide Operating Temperature Range: Operates from -40°C to 125°C.
- Package Options: Available in TO-220, TO-220FP, D²PAK, and D²PAK/A packages).
- Pinout Compatibility: Pin-to-pin compatible with standard adjustable voltage regulators).
- Efficient Quiescent Current: Quiescent current flows into the load, increasing efficiency).
- Low Output Noise: Output noise voltage is 0.003% of the output voltage).
Applications
- Power Supplies: Suitable for use in various power supply designs where high current and low dropout voltage are required.
- Industrial Control Systems: Used in industrial control systems that demand stable and efficient voltage regulation.
- Automotive Systems: Applicable in automotive systems due to its wide operating temperature range and robust protection features.
- Consumer Electronics: Employed in consumer electronics such as audio equipment, medical devices, and other applications requiring reliable voltage regulation.
- Telecommunications: Used in telecommunications equipment where stable and efficient power supply is crucial.
Q & A
- What is the maximum output current of the LD1085D2T25R?
The LD1085D2T25R can provide up to 3 A of output current).
- What is the typical dropout voltage of the LD1085D2T25R?
The typical dropout voltage is 1.3 V at the maximum output current of 3 A).
- What are the available output voltage options for the LD1085D2T25R?
The LD1085 series, including the LD1085D2T25R, offers fixed output voltages such as 1.8 V, 2.5 V, 3.3 V, and 5 V, as well as adjustable output voltage options).
- What is the operating temperature range of the LD1085D2T25R?
The operating temperature range is from -40°C to 125°C).
- What are the package options for the LD1085D2T25R?
The LD1085D2T25R is available in TO-220, TO-220FP, D²PAK, and D²PAK/A packages).
- Does the LD1085D2T25R have internal protection features?
Yes, it features internal power and thermal limit protection).
- What is the quiescent current of the LD1085D2T25R?
The quiescent current is typically 5 mA to 10 mA when VIN ≤ 30 V).
- How does the LD1085D2T25R handle short-circuit conditions?
The device has a short-circuit current limit, with values ranging from 3.2 A to 4.5 A depending on the input-output voltage difference).
- What is the supply voltage rejection (SVR) of the LD1085D2T25R?
The SVR is 60 dB to 72 dB at 120 Hz with CO = 25 µF and VIN = 8.3 ± 3 V).
- Is the LD1085D2T25R RoHS compliant?
Yes, the LD1085D2T25R is lead-free and RoHS compliant).
