Specifications
| Attribute | Value |
| Package | Tape & Reel (TR),Cut Tape (CT) |
| ProductStatus | Not For New Designs |
| ReferenceType | Shunt |
| OutputType | Adjustable |
| Voltage-Output(Min/Fixed) | 2.495V |
| Voltage-Output(Max) | 37 V |
| Current-Output | 100 mA |
| Tolerance | ±2.2% |
| TemperatureCoefficient | 50ppm/°C Typical |
| Current-Cathode | 1 mA |
| OperatingTemperature | -40°C ~ 85°C (TA) |
| MountingType | Surface Mount |
| Package/Case | TO-236-3, SC-59, SOT-23-3 |
Overview
Description
The LM431AIM3 is a precision programmable shunt voltage reference commonly used in electronic circuits for voltage regulation and control. It is part of the LM431 series and is known for its versatility in providing a stable reference voltage with a wide operating range. This component can be adjusted to output a voltage between 2.5V and 36V by selecting appropriate external resistor values.
The LM431AIM3 operates like a Zener diode but with better temperature stability and lower noise. It is typically available in a SOT-23 package, which is compact and suitable for space-constrained applications. Its key features include a low dynamic impedance, fast turn-on time, and good thermal stability, making it suitable for use in power supplies, battery chargers, and various control systems.
Applications for the LM431AIM3 include precision voltage regulation, switching power supplies, error amplifiers, and reference for analog-to-digital converters. Its ability to maintain consistent performance over varying temperatures and loads makes it a reliable choice for designers seeking an accurate voltage reference.
The LM431AIM3 operates like a Zener diode but with better temperature stability and lower noise. It is typically available in a SOT-23 package, which is compact and suitable for space-constrained applications. Its key features include a low dynamic impedance, fast turn-on time, and good thermal stability, making it suitable for use in power supplies, battery chargers, and various control systems.
Applications for the LM431AIM3 include precision voltage regulation, switching power supplies, error amplifiers, and reference for analog-to-digital converters. Its ability to maintain consistent performance over varying temperatures and loads makes it a reliable choice for designers seeking an accurate voltage reference.
Equivalent
The LM431AIM3 is a programmable shunt regulator. Equivalent products include TL431 from Texas Instruments, KA431 from ON Semiconductor, AS431 from Diodes Incorporated, and TLVH431 from Texas Instruments. These components perform similar functions and can often be used interchangeably in circuits requiring a shunt regulator. Always check the datasheets for compatibility in terms of voltage, current, and package type to ensure proper functionality in your specific application.
Features
The LM431AIM3 is a precision adjustable shunt voltage regulator designed for a wide range of applications. Key features include:
1. Adjustable Output Voltage: It can be configured to provide a precise output voltage ranging from 2.5V to 36V.
2. High Accuracy: The device offers a reference voltage accuracy of ±1%, ensuring precise voltage regulation.
3. Low Output Impedance: With an output impedance of 0.2Ω, it offers excellent load regulation.
4. Wide Operating Range: It operates over a wide cathode current range of 1mA to 100mA.
5. Temperature Stability: The device demonstrates good thermal stability across its operating temperature range of -40°C to 85°C.
6. Package Options: It is available in a compact SOT-23-3 package, making it suitable for space-constrained applications.
7. Low Noise: The LM431AIM3 has low output noise, which is beneficial for sensitive applications.
This device is suitable for use in precision power supplies, voltage monitoring, and adjustable voltage and current sources. Its combination of accuracy, flexibility, and small package size make it a versatile component in electronic circuits.
1. Adjustable Output Voltage: It can be configured to provide a precise output voltage ranging from 2.5V to 36V.
2. High Accuracy: The device offers a reference voltage accuracy of ±1%, ensuring precise voltage regulation.
3. Low Output Impedance: With an output impedance of 0.2Ω, it offers excellent load regulation.
4. Wide Operating Range: It operates over a wide cathode current range of 1mA to 100mA.
5. Temperature Stability: The device demonstrates good thermal stability across its operating temperature range of -40°C to 85°C.
6. Package Options: It is available in a compact SOT-23-3 package, making it suitable for space-constrained applications.
7. Low Noise: The LM431AIM3 has low output noise, which is beneficial for sensitive applications.
This device is suitable for use in precision power supplies, voltage monitoring, and adjustable voltage and current sources. Its combination of accuracy, flexibility, and small package size make it a versatile component in electronic circuits.
Pinout
The LM431AIM3 is a three-pin adjustable precision shunt regulator. Here is a concise overview of its pin count and functions:
1. Pin Count:
- The LM431AIM3 is housed in a SOT-23 package, which has 3 pins.
2. Pin Functions:
- Reference (REF): This pin is used to set the reference voltage. It is connected to the internal voltage reference and is typically tied to a resistor divider network to adjust the output voltage.
- Anode (A): This pin connects to the negative side of the voltage being regulated. It is typically connected to ground.
- Cathode (K): This pin is the output of the regulator. It connects to the positive side of the voltage being regulated and sinks current to maintain a stable output voltage.
The LM431AIM3 is used in applications requiring a precision voltage reference or a low-cost adjustable voltage regulator.
1. Pin Count:
- The LM431AIM3 is housed in a SOT-23 package, which has 3 pins.
2. Pin Functions:
- Reference (REF): This pin is used to set the reference voltage. It is connected to the internal voltage reference and is typically tied to a resistor divider network to adjust the output voltage.
- Anode (A): This pin connects to the negative side of the voltage being regulated. It is typically connected to ground.
- Cathode (K): This pin is the output of the regulator. It connects to the positive side of the voltage being regulated and sinks current to maintain a stable output voltage.
The LM431AIM3 is used in applications requiring a precision voltage reference or a low-cost adjustable voltage regulator.
Manufacturer
The LM431AIM3 is manufactured by Texas Instruments (TI). Texas Instruments is an American technology company that designs and manufactures semiconductors and integrated circuits, which are used in electronic devices. TI is one of the largest semiconductor companies in the world and serves various markets, including industrial, automotive, personal electronics, communications equipment, and enterprise systems. The company is known for its innovation in analog and embedded processing products.
Application
The LM431AIM3 is a precision adjustable shunt regulator used in various applications. Key areas include:
1. Voltage Regulation: Provides stable reference voltage for power supplies and other circuits.
2. Switching Power Supplies: Used in feedback networks for improving load regulation.
3. Data Acquisition Systems: Ensures accurate signaling and reference.
4. Analog-to-Digital Converters (ADCs): Offers stable voltage reference for precise conversions.
5. Battery Chargers: Maintains consistent charging voltage.
6. Instrumentation: Used in measurement devices for stable operation.
7. Temperature Sensing: Helps in maintaining consistent reference in sensor circuits.
These applications benefit from its accuracy, low temperature coefficient, and adjustable voltage capabilities.
1. Voltage Regulation: Provides stable reference voltage for power supplies and other circuits.
2. Switching Power Supplies: Used in feedback networks for improving load regulation.
3. Data Acquisition Systems: Ensures accurate signaling and reference.
4. Analog-to-Digital Converters (ADCs): Offers stable voltage reference for precise conversions.
5. Battery Chargers: Maintains consistent charging voltage.
6. Instrumentation: Used in measurement devices for stable operation.
7. Temperature Sensing: Helps in maintaining consistent reference in sensor circuits.
These applications benefit from its accuracy, low temperature coefficient, and adjustable voltage capabilities.
Package
The LM431AIM3 is typically available in a SOT-23 package type, which is a small, surface-mount package designed for compact electronic devices.
