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LTC2931IF#PBF
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LTC2931IF#PBF

Product Overview

Category: Integrated Circuit (IC)

Use: Power Supply Monitor and Reset Circuit

Characteristics: - Monitors the power supply voltage and generates a reset signal when the voltage falls below a specified threshold. - Provides a reliable way to ensure proper system operation by resetting the microcontroller or other digital logic devices during power-up, power-down, or brownout conditions.

Package: 16-Lead Plastic TSSOP

Essence: The LTC2931IF#PBF is an integrated circuit designed to monitor power supply voltages and generate reset signals for digital systems.

Packaging/Quantity: The LTC2931IF#PBF is available in a 16-Lead Plastic Thin Shrink Small Outline Package (TSSOP) and is typically sold in reels of 2500 units.

Specifications

  • Supply Voltage Range: 2.7V to 5.5V
  • Threshold Accuracy: ±1.5%
  • Reset Timeout Period: Adjustable from 100ms to 10s
  • Operating Temperature Range: -40°C to +85°C
  • Quiescent Current: 20µA (typical)
  • Power-On Reset Delay: 200ms (typical)

Pin Configuration

The LTC2931IF#PBF has a total of 16 pins. Here is the detailed pin configuration:

  1. VCC - Power Supply Input
  2. GND - Ground
  3. MR - Manual Reset Input
  4. RESET - Reset Output
  5. GND - Ground
  6. GND - Ground
  7. GND - Ground
  8. GND - Ground
  9. GND - Ground
  10. GND - Ground
  11. GND - Ground
  12. GND - Ground
  13. GND - Ground
  14. GND - Ground
  15. GND - Ground
  16. VCC - Power Supply Input

Functional Features

  • Monitors the power supply voltage continuously.
  • Generates a reset signal when the voltage falls below the specified threshold.
  • Provides an adjustable reset timeout period to accommodate different system requirements.
  • Offers a manual reset input for immediate system reset.
  • Low quiescent current consumption helps in power-sensitive applications.

Advantages and Disadvantages

Advantages: - Reliable power supply monitoring and reset generation. - Adjustable reset timeout period for flexibility. - Manual reset input for immediate system reset. - Low quiescent current consumption.

Disadvantages: - Limited operating temperature range (-40°C to +85°C). - Threshold accuracy may not be suitable for highly precise applications.

Working Principles

The LTC2931IF#PBF operates by continuously monitoring the power supply voltage using an internal voltage reference. When the voltage falls below the specified threshold, it triggers the reset circuitry, generating a reset signal. The reset timeout period can be adjusted to meet the specific requirements of the system. Additionally, a manual reset input is provided for immediate system reset.

Detailed Application Field Plans

The LTC2931IF#PBF is commonly used in various applications where reliable power supply monitoring and reset functionality are crucial. Some typical application fields include:

  1. Microcontroller-based systems
  2. Industrial control systems
  3. Embedded systems
  4. Automotive electronics
  5. Medical devices

Detailed and Complete Alternative Models

  1. LTC2930: Similar to LTC2931IF#PBF but with a different package option (8-Lead MSOP).
  2. MAX823: Power supply monitor and reset circuit with similar features but from a different manufacturer.
  3. TPS3808: Programmable voltage supervisor with adjustable reset timeout period.

These alternative models offer similar functionality and can be considered as substitutes for the LTC2931IF#PBF in various applications.

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Seznam 10 běžných otázek a odpovědí souvisejících s aplikací LTC2931IF#PBF v technických řešeních

Sure! Here are 10 common questions and answers related to the application of LTC2931IF#PBF in technical solutions:

Q1: What is LTC2931IF#PBF? A1: LTC2931IF#PBF is a specific model number for a power supply sequencer and supervisor IC manufactured by Linear Technology (now part of Analog Devices). It is used to control the power-up and power-down sequencing of multiple voltage rails in electronic systems.

Q2: What are the key features of LTC2931IF#PBF? A2: Some key features of LTC2931IF#PBF include programmable sequencing, adjustable timing delays, fault detection, power-on reset, and watchdog timer functionality.

Q3: How does LTC2931IF#PBF help in power supply sequencing? A3: LTC2931IF#PBF provides a simple and reliable solution for power supply sequencing by ensuring that different voltage rails turn on and off in a specific order, preventing potential issues such as voltage spikes or latch-up conditions.

Q4: Can LTC2931IF#PBF be used in both single-rail and multi-rail applications? A4: Yes, LTC2931IF#PBF can be used in both single-rail and multi-rail applications. It supports up to 12 independent voltage rails, making it suitable for a wide range of system configurations.

Q5: How is LTC2931IF#PBF programmed for sequencing? A5: LTC2931IF#PBF can be programmed using an external resistor network or through an I2C interface. The sequencing order and timing delays can be easily configured based on the specific requirements of the system.

Q6: Does LTC2931IF#PBF provide any fault detection capabilities? A6: Yes, LTC2931IF#PBF includes fault detection features such as undervoltage and overvoltage monitoring, which can help protect the system from potential power supply issues.

Q7: Can LTC2931IF#PBF be used in battery-powered applications? A7: Yes, LTC2931IF#PBF can be used in battery-powered applications. It has a wide operating voltage range and low quiescent current, making it suitable for power-sensitive designs.

Q8: What is the purpose of the power-on reset feature in LTC2931IF#PBF? A8: The power-on reset feature in LTC2931IF#PBF ensures that the system remains in a known state during power-up by holding the reset output low until all voltage rails have reached their specified levels.

Q9: Can LTC2931IF#PBF be used in high-temperature environments? A9: Yes, LTC2931IF#PBF is designed to operate in a wide temperature range, typically from -40°C to 125°C, making it suitable for use in high-temperature environments.

Q10: Are there any application notes or reference designs available for LTC2931IF#PBF? A10: Yes, Analog Devices provides application notes and reference designs for LTC2931IF#PBF, which can help engineers understand its usage and implementation in various technical solutions.

Please note that the answers provided here are general and may vary depending on the specific requirements and configurations of the system. It is always recommended to refer to the datasheet and documentation provided by the manufacturer for accurate information.