Overview
The LM2990S-12/NOPB is a three-terminal, low-dropout negative voltage regulator produced by Texas Instruments. This component is designed to provide a stable negative output voltage with minimal dropout voltage, making it suitable for a variety of applications requiring negative voltage regulation.
The LM2990 series offers fixed output voltages of −5 V, −5.2 V, −12 V, and −15 V, with the LM2990S-12/NOPB specifically providing a fixed output of −12 V. It features a high output current capability of up to 1 A and a low quiescent current, enhancing its efficiency and reliability in power supply systems.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Fixed Output Voltage | −12 V | V |
| Maximum Output Current (Iout) | 1 A | A |
| Typical Quiescent Current (Iq) | 1 mA | mA |
| Dropout Voltage (Typical at 1 A) | 0.6 V | V |
| Output Voltage Accuracy | 5% | % |
| Operating Temperature Range | −40°C to 125°C | °C |
| Input Voltage Range | −26 V to −6 V | V |
| Output Noise (10 Hz to 100 kHz) | 500 μV (max) | μV |
| Package Type | TO-263 (DDPAK) | |
| Thermal Resistance (θJA) | 23 °C/W | °C/W |
Key Features
- Low-Dropout Voltage: Typically 0.6 V at 1 A load current, ensuring efficient voltage regulation.
- High Output Current: Capable of delivering up to 1 A of output current.
- Low Quiescent Current: Typical quiescent current of 1 mA, reducing power consumption in standby modes.
- High Accuracy: Output voltage accuracy of 5% over the entire operating range.
- Broad Operating Temperature Range: Operates from −40°C to 125°C, making it suitable for various environmental conditions.
- Low Output Noise: Maximum output noise of 500 μV (rms) from 10 Hz to 100 kHz.
- Compact Packaging: Available in TO-263 (DDPAK) package, ideal for space-constrained designs.
Applications
- Power Supplies: Used in negative voltage power supply systems where low dropout and high current capability are required.
- Industrial Control Systems: Suitable for industrial control systems that need stable negative voltage regulation.
- Telecommunications Equipment: Applied in telecommunications equipment requiring reliable negative voltage supplies.
- Aerospace and Defense: Used in aerospace and defense applications due to its robust performance over a wide temperature range.
- Automotive Systems: Employed in automotive systems that require stable negative voltage regulation under varying conditions.
Q & A
- What is the fixed output voltage of the LM2990S-12/NOPB?
The fixed output voltage of the LM2990S-12/NOPB is −12 V.
- What is the maximum output current of the LM2990S-12/NOPB?
The maximum output current is 1 A.
- What is the typical quiescent current of the LM2990S-12/NOPB?
The typical quiescent current is 1 mA.
- What is the dropout voltage at 1 A load current for the LM2990S-12/NOPB?
The dropout voltage is typically 0.6 V at 1 A load current.
- What is the operating temperature range of the LM2990S-12/NOPB?
The operating temperature range is from −40°C to 125°C.
- What is the input voltage range for the LM2990S-12/NOPB?
The input voltage range is from −26 V to −6 V.
- What is the output noise of the LM2990S-12/NOPB?
The output noise is a maximum of 500 μV (rms) from 10 Hz to 100 kHz.
- In what package is the LM2990S-12/NOPB available?
The LM2990S-12/NOPB is available in the TO-263 (DDPAK) package.
- What is the thermal resistance (θJA) of the LM2990S-12/NOPB?
The thermal resistance (θJA) is 23 °C/W.
- What are some common applications of the LM2990S-12/NOPB?
Common applications include power supplies, industrial control systems, telecommunications equipment, aerospace and defense, and automotive systems.
