Overview
The LD1084V25, produced by STMicroelectronics, is a low-drop voltage regulator designed to provide up to 5 A of output current. This regulator is part of the LD1084 series and is known for its high efficiency and tight output voltage tolerance. It is pin-to-pin compatible with older 3-terminal adjustable regulators but offers improved performance in terms of dropout voltage and output tolerance. The LD1084V25 is supplied in a TO-220 package and operates over a wide temperature range from -40 °C to 125 °C, making it suitable for various industrial and automotive applications.
Key Specifications
| Parameter | Test Conditions | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|
| Output Voltage (VO) | IO = 0 mA, TJ = 25 °C | 2.793 | 2.85 | 2.907 | V |
| Output Voltage (VO) | IO = 0 to 5 A, VI = 4.5 to 30 V | 2.793 | 2.85 | 2.907 | V |
| Line Regulation (∆VO) | IO = 0 mA, VI = 4.5 to 18 V, TJ = 25 °C | 0.5 | 6 | 18 | mV |
| Load Regulation (∆VO) | IO = 0 to 5 A, TJ = 25 °C | 12 | 36 | 72 | mV |
| Dropout Voltage (Vd) | IO = 5 A | 1.3 | 1.5 | V | |
| Quiescent Current (Iq) | VI ≤ 30 V | 5 | 10 | mA | |
| Short-Circuit Current (Isc) | VI - VO = 5 V | 5.5 | 6.5 | A | |
| Thermal Regulation | TA = 25 °C, 30 ms pulse | 0.003 | 0.015 | %/W | |
| Supply Voltage Rejection (SVR) | f = 120 Hz, CO = 25 µF, IO = 5 A, VI = 17 ± 3 V | 54 | 66 | dB | |
| RMS Output Noise Voltage (eN) | TA = 25 °C, f = 10 Hz to 10 kHz | 0.003 | % of VO | ||
| Temperature Stability (S) | 0.5 | % | |||
| Long Term Stability (S) | TA = 125 °C, 1000 hrs | 0.5 | % |
Key Features
- Low Dropout Voltage: Typical dropout voltage of 1.3 V at 5 A, with a maximum of 1.5 V.
- Adjustable Output Voltage: Three-terminal adjustable output voltage configuration.
- High Output Current: Guaranteed output current up to 5 A.
- Tight Output Tolerance: Output tolerance of ± 1% at 25 °C and ± 2% over the full temperature range.
- Internal Power and Thermal Limit: Internal power and thermal limiting to protect the device.
- Wide Operating Temperature Range: Operates from -40 °C to 125 °C.
- Pinout Compatibility: Pin-to-pin compatible with standard adjustable voltage regulators.
- Efficient Quiescent Current: Quiescent current flows into the load to increase efficiency.
- Minimum Capacitor Requirement: Requires a minimum capacitor of 10 µF for stability.
Applications
- Industrial Power Supplies: Suitable for high-current industrial power supply applications due to its high output current and low dropout voltage.
- Automotive Systems: Used in automotive systems where a wide operating temperature range and high reliability are crucial.
- Power Distribution Systems: Ideal for power distribution systems requiring adjustable output voltages and high current handling.
- Embedded Systems: Can be used in embedded systems where efficient power regulation and low noise are essential.
Q & A
- What is the maximum output current of the LD1084V25?
The LD1084V25 can provide up to 5 A of output current.
- What is the typical dropout voltage of the LD1084V25 at 5 A?
The typical dropout voltage is 1.3 V at 5 A, with a maximum of 1.5 V.
- What is the output voltage tolerance of the LD1084V25 at 25 °C?
The output voltage tolerance is ± 1% at 25 °C.
- What is the operating temperature range of the LD1084V25?
The operating temperature range is from -40 °C to 125 °C.
- What package is the LD1084V25 available in?
The LD1084V25 is available in a TO-220 package.
- Is the LD1084V25 pin-to-pin compatible with older adjustable regulators?
Yes, it is pin-to-pin compatible with older 3-terminal adjustable regulators.
- What is the minimum capacitor required for stability?
A minimum capacitor of 10 µF is required for stability.
- How does the quiescent current of the LD1084V25 contribute to efficiency?
The quiescent current flows into the load, increasing the efficiency of the regulator.
- What is the supply voltage rejection (SVR) of the LD1084V25?
The supply voltage rejection is 54 to 66 dB at 120 Hz with specific test conditions.
- What is the RMS output noise voltage of the LD1084V25?
The RMS output noise voltage is 0.003% of the output voltage from 10 Hz to 10 kHz.
