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IC REG LIN NEG ADJ 1A DDPAK
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FabricanteNational Semiconductor
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Peça do Fabricante #LM2991SX/NOPB
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Ficha Técnica LM2991SX/NOPB DataSheet
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Pacote TO-263-5
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Especificações
| Atributo | Valor |
| Package / Case | Bulk |
| Part Status | Active |
| Output Configuration | Negative |
| Output Type | Adjustable |
| Number of Regulators | 1 |
| Voltage - Input (Max) | -26V |
| Voltage - Output (Min/Fixed) | -3V |
| Voltage - Output (Max) | -24V |
| Voltage Dropout (Max) | 1V @ 1A |
| Current - Output | 1A |
| Current - Quiescent (Iq) | 0.7 mA |
| Current - Supply (Max) | 5 mA |
| PSRR | 60dB (1kHz) |
| Control Features | Enable |
| Protection Features | Over Temperature, Short Circuit |
| Operating Temperature | -40°C ~ 125°C |
| Mounting Type | Surface Mount |
Visão Geral
Description
The LM2991SX/NOPB is a negative voltage regulator from Texas Instruments. It is designed for applications requiring high-performance regulation with an adjustable output. The device can deliver an output voltage in the range of -3V to -24V and provides a maximum output current of 1.5A. Key features include low dropout voltage, typically around 0.6V at 1A, and a low quiescent current, making it suitable for battery-operated applications.
The regulator includes a shutdown feature for power saving and has built-in protection mechanisms such as thermal shutdown and current limiting to enhance system reliability. The LM2991 is offered in a TO-263 surface-mount package, which helps in efficient heat dissipation.
This makes the LM2991SX/NOPB ideal for a variety of applications, including industrial power supplies, telecommunications equipment, and automotive systems, where stable negative voltage regulation is required. The device's adjustability, efficiency, and robust protection features make it versatile for use in various electronic designs.
The regulator includes a shutdown feature for power saving and has built-in protection mechanisms such as thermal shutdown and current limiting to enhance system reliability. The LM2991 is offered in a TO-263 surface-mount package, which helps in efficient heat dissipation.
This makes the LM2991SX/NOPB ideal for a variety of applications, including industrial power supplies, telecommunications equipment, and automotive systems, where stable negative voltage regulation is required. The device's adjustability, efficiency, and robust protection features make it versatile for use in various electronic designs.
Equivalent
The LM2991SX/NOPB is a low dropout negative voltage regulator. Equivalent products include:
1. LT1963 by Analog Devices: An adjustable low dropout negative regulator.
2. MIC29500-2.5WT by Microchip Technology: A high-current LDO regulator, offering similar voltage regulation.
3. MC7905CD2TR4G by ON Semiconductor: A fixed negative voltage regulator for similar applications.
Check specifications to ensure compatibility with your requirements, as equivalence can vary based on specific needs such as current ratings and voltage outputs.
1. LT1963 by Analog Devices: An adjustable low dropout negative regulator.
2. MIC29500-2.5WT by Microchip Technology: A high-current LDO regulator, offering similar voltage regulation.
3. MC7905CD2TR4G by ON Semiconductor: A fixed negative voltage regulator for similar applications.
Check specifications to ensure compatibility with your requirements, as equivalence can vary based on specific needs such as current ratings and voltage outputs.
Features
The LM2991SX/NOPB is a low dropout adjustable negative voltage regulator designed to provide up to 1.5A of output current. Key features include:
1. Adjustable Output Voltage: Capable of handling output voltages ranging from -3V to -24V.
2. Low Dropout Voltage: Offers a dropout voltage of 0.6V at 1.5A, ensuring efficient performance even with lower voltage input-output differentials.
3. Output Overvoltage Protection: Safeguards the device from voltage spikes exceeding the set limits.
4. Thermal Shutdown: Protects the regulator from overheating by automatically shutting down when a certain temperature threshold is reached.
5. Current Limiting: Built-in current limit prevents excessive load current to protect the device and connected circuits.
6. Reverse Battery Protection: Protects the circuit if the battery is connected in reverse.
7. Package: Available in a TO-263 surface-mount package for easy integration into various applications.
These features make the LM2991SX/NOPB suitable for applications requiring reliable negative voltage regulation, such as industrial and communication systems.
1. Adjustable Output Voltage: Capable of handling output voltages ranging from -3V to -24V.
2. Low Dropout Voltage: Offers a dropout voltage of 0.6V at 1.5A, ensuring efficient performance even with lower voltage input-output differentials.
3. Output Overvoltage Protection: Safeguards the device from voltage spikes exceeding the set limits.
4. Thermal Shutdown: Protects the regulator from overheating by automatically shutting down when a certain temperature threshold is reached.
5. Current Limiting: Built-in current limit prevents excessive load current to protect the device and connected circuits.
6. Reverse Battery Protection: Protects the circuit if the battery is connected in reverse.
7. Package: Available in a TO-263 surface-mount package for easy integration into various applications.
These features make the LM2991SX/NOPB suitable for applications requiring reliable negative voltage regulation, such as industrial and communication systems.
Pinout
The LM2991SX/NOPB is a negative low-dropout adjustable voltage regulator. It has an 8-pin SOIC (Small Outline Integrated Circuit) package. Here is a brief description of its pin functions:
1. Vin (Pin 1): Input voltage pin where the unregulated negative voltage is supplied.
2. GND (Pin 2): Ground reference pin for the regulator.
3. Adj (Pin 3): Adjust pin used to set the output voltage by connecting it to a resistor divider between the output, adjust pin, and ground.
4. Vout (Pin 4): Regulated output voltage pin.
5. Sense (Pin 5): Allows remote voltage sensing for improved regulation by compensating for voltage drop across the load connections.
6. N/C (Pins 6 and 7): No connection pins, typically left unconnected.
8. Enable (Pin 8): A logic-level control pin that enables or disables the regulator output.
The LM2991SX/NOPB can be used in various applications requiring stable negative voltage regulation with low dropout voltage, making it suitable for battery-powered systems and other precision applications.
1. Vin (Pin 1): Input voltage pin where the unregulated negative voltage is supplied.
2. GND (Pin 2): Ground reference pin for the regulator.
3. Adj (Pin 3): Adjust pin used to set the output voltage by connecting it to a resistor divider between the output, adjust pin, and ground.
4. Vout (Pin 4): Regulated output voltage pin.
5. Sense (Pin 5): Allows remote voltage sensing for improved regulation by compensating for voltage drop across the load connections.
6. N/C (Pins 6 and 7): No connection pins, typically left unconnected.
8. Enable (Pin 8): A logic-level control pin that enables or disables the regulator output.
The LM2991SX/NOPB can be used in various applications requiring stable negative voltage regulation with low dropout voltage, making it suitable for battery-powered systems and other precision applications.
Manufacturer
The LM2991SX/NOPB is manufactured by Texas Instruments. Texas Instruments (TI) is a global semiconductor company that designs and manufactures a broad range of analog and embedded processing chips. TI's products are used in a wide array of applications, including industrial, automotive, personal electronics, and communications equipment. The company is known for its innovations in the semiconductor industry and has a strong focus on research and development to advance its technologies.
Application
The LM2991SX/NOPB is a low-dropout (LDO) voltage regulator designed for various applications requiring efficient power management and precise voltage regulation. Key application areas include:
1. Automotive Electronics: Provides reliable power supply for in-vehicle electronic systems.
2. Industrial Equipment: Ensures stable operation of machinery and control systems.
3. Telecommunications: Powers communication devices and infrastructure.
4. Consumer Electronics: Supports devices requiring stable voltage outputs.
5. Battery-Powered Devices: Efficiently manages power for extended battery life.
6. Embedded Systems: Offers precise voltage regulation for microcontrollers and other components.
Its wide input voltage range and adjustable output make it versatile for various power supply needs.
1. Automotive Electronics: Provides reliable power supply for in-vehicle electronic systems.
2. Industrial Equipment: Ensures stable operation of machinery and control systems.
3. Telecommunications: Powers communication devices and infrastructure.
4. Consumer Electronics: Supports devices requiring stable voltage outputs.
5. Battery-Powered Devices: Efficiently manages power for extended battery life.
6. Embedded Systems: Offers precise voltage regulation for microcontrollers and other components.
Its wide input voltage range and adjustable output make it versatile for various power supply needs.
Package
The LM2991SX/NOPB is a negative voltage regulator packaged in a TO-263 surface-mount package, also known as D2PAK.
