Overview
The LD1085D2T33R is a low drop positive voltage regulator produced by STMicroelectronics. This device is capable of providing up to 3 A of output current and is available in various packages, including D²PAK. It is designed to offer high performance with a low dropout voltage, making it suitable 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 and output tolerance.
Key Specifications
| Parameter | Test Condition | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|
| Output Voltage (VO) | IO = 0 mA, TJ = 25°C | 3.267 | 3.3 | 3.333 | V |
| Output Voltage (VO) | IO = 0 to 3 A, VI = 4.9 to 30 V | 3.234 | 3.35 | 3.366 | V |
| Line Regulation (ΔVO) | IO = 0 mA, VI = 4.9 to 18 V, TJ = 25°C | 0.5 | 6 | 6 | mV |
| Load Regulation (ΔVO) | IO = 0 to 3 A, TJ = 25°C | 3 | 15 | 15 | mV |
| Dropout Voltage (Vd) | IO = 3 A | 1.3 | 1.5 | 1.5 | V |
| Quiescent Current (Iq) | VI ≤ 30 V | 5 | 10 | 10 | mA |
| Operating Temperature Range | -40 | 125 | °C | ||
| Package | D²PAK |
Key Features
- Guaranteed output current up to 3 A.
- Low dropout voltage: maximum of 1.2 V at the maximum output current.
- Tight output voltage tolerance: ± 1% at 25 °C and ± 2% in full temperature range.
- Internal power and thermal limit.
- Wide operating temperature range: -40 °C to 125 °C.
- 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 LD1085D2T33R is suitable for various applications requiring a stable and efficient voltage supply. These include:
- Power supplies for electronic devices.
- Industrial control systems.
- Automotive electronics.
- Consumer electronics.
- Telecommunication equipment.
Q & A
- What is the maximum output current of the LD1085D2T33R? The maximum output current is up to 3 A.
- What is the typical dropout voltage of the LD1085D2T33R? The typical dropout voltage is 1.3 V at 3 A.
- What are the available output voltages for the LD1085D2T33R? The available fixed output voltages are 1.8 V, 2.5 V, 3.3 V, and 5 V.
- What is the output voltage tolerance of the LD1085D2T33R? The output voltage tolerance is ± 1% at 25 °C and ± 2% in the full temperature range.
- What is the operating temperature range of the LD1085D2T33R? The operating temperature range is -40 °C to 125 °C.
- What package types are available for the LD1085D2T33R? The device is available in D²PAK, among other packages.
- What is the minimum capacitor required for stability? A minimum of 10 µF capacitor is required for stability.
- Is the LD1085D2T33R pin-to-pin compatible with older regulators? Yes, it is pin-to-pin compatible with standard adjustable voltage regulators.
- What is the quiescent current of the LD1085D2T33R? The quiescent current is 5 to 10 mA when VI ≤ 30 V.
- What are some typical applications of the LD1085D2T33R? Typical applications include power supplies, industrial control systems, automotive electronics, consumer electronics, and telecommunication equipment.
