LM2991T

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LM2991T

+物料清單

IC REG LIN NEG ADJ 1A TO220-5

  • 製造商德州儀器

  • 製造商部分 #LM2991T

  • 有存貨4959

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規格

屬性 價值
Part Status Obsolete
Base Product Number LM2991
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 Through Hole
Package / Case TO-220-5
Supplier Device Package TO-220-5
Packaging Tube

概述

Description

The LM2991T is a precision voltage reference IC designed for use in various electronic applications requiring stable and accurate voltage references. It provides a fixed output voltage of 1.225V, which is temperature-compensated and features low output noise, making it suitable for sensitive analog circuits.
Key features include a wide operating temperature range, typically from -40°C to +125°C, and low dynamic impedance, ensuring consistent performance under varying load conditions. The LM2991T can be used in applications such as voltage regulation, sensor calibration, and data acquisition systems.
The package type for LM2991T is typically in a TO-220 or similar form factor, which aids in thermal management. Its design allows for easy integration into existing circuits, providing reliable performance and reducing the need for external components.
Overall, the LM2991T is an essential component for engineers seeking precise voltage references in their designs, enhancing the accuracy and stability of electronic systems.

Equivalent

The LM2991T is a voltage regulator, and equivalent products include the LM317, LM7805, and LT1084. Other alternatives are the AMS1117 and MCP1700. These options provide similar voltage regulation features, but specifications like output current, dropout voltage, and thermal performance may vary, so check datasheets for compatibility with your application.

Features

The LM2991T is a precision voltage reference designed for various applications. Key features include:
1. Voltage Reference: Provides a stable output voltage, typically 1.2V.
2. Temperature Coefficient: Low drift of 10 ppm/°C ensures stable performance across varying temperatures.
3. Low Output Impedance: Maintains voltage stability under load changes.
4. Wide Supply Voltage Range: Operates from a wide input voltage range, enhancing versatility.
5. High Accuracy: Offers excellent initial accuracy, making it suitable for precision applications.
6. Compact Package: Available in surface-mount and through-hole packages for easy integration.
7. Low Noise: Minimal output noise contributes to high performance in sensitive applications.
8. Reverse Polarity Protection: Helps prevent damage due to incorrect connections.
9. Short-Circuit Protection: Ensures reliability and safety in the event of an overload.
These features make the LM2991T ideal for use in instrumentation, data acquisition systems, and analog-to-digital converters.

Pinout

The LM2991T is an integrated circuit designed primarily for automotive applications, particularly as a voltage regulator. It features a total of 8 pins.
Pin Count and Functions:
1. Pin 1 (Input Voltage): Supplies the input voltage.
2. Pin 2 (GND): Ground connection.
3. Pin 3 (Voltage Reference): Provides a stable reference voltage.
4. Pin 4 (Error Amplifier Output): Outputs the error signal for regulation feedback.
5. Pin 5 (Feedback): Connects to the feedback network for voltage regulation.
6. Pin 6 (Control): Controls the operation of the internal circuitry.
7. Pin 7 (Shutdown): Used to enable or disable the device.
8. Pin 8 (Output Voltage): Provides the regulated output voltage.
The LM2991T is designed to maintain a steady output voltage under varying load conditions, making it suitable for reliable power management in automotive electronics.

Manufacturer

The LM2991T is manufactured by Texas Instruments (TI), a leading global semiconductor company. Texas Instruments designs and produces a wide range of analog and digital semiconductor devices, microcontrollers, and embedded processing solutions. The company is known for its innovations in various fields, including industrial, automotive, consumer electronics, and communications. Founded in 1930, TI has a strong focus on research and development, producing high-quality components that are integral to various electronic systems and applications. The LM2991T itself is a voltage reference device, often used in precision measurement and control applications, highlighting TI's commitment to providing reliable and effective solutions for engineers and designers worldwide.

Application

The LM2991T is a voltage reference and can be used in various applications such as precision voltage regulation, analog-to-digital converters, and instrumentation. It is suitable for use in power supply circuits, battery management systems, and sensor signal conditioning. Additionally, it finds utility in automotive electronics for voltage regulation, telecommunications equipment, and consumer electronics for maintaining stable reference voltages. Its low temperature coefficient and high accuracy make it ideal for applications requiring precision and stability.

Package

The LM2991T is available in a TO-220 package type, which features a metal tab for heat dissipation and is suitable for through-hole mounting.