MCP131T-475E/LB

Product Overview

Category

The MCP131T-475E/LB belongs to the category of voltage supervisors.

Use

This product is primarily used for monitoring and controlling the voltage levels in electronic circuits.

Characteristics

• Voltage Range: The MCP131T-475E/LB operates within a voltage range of 1.6V to 5.5V.
• Low Power Consumption: It consumes very low power, making it suitable for battery-powered applications.
• Reset Threshold Accuracy: The device provides accurate reset threshold voltage monitoring.
• Small Package Size: The MCP131T-475E/LB comes in a compact SOT-23 package, allowing for space-efficient designs.
• High Temperature Range: It can operate within a wide temperature range of -40°C to +125°C.

Package and Quantity

The MCP131T-475E/LB is available in a SOT-23 package. It is typically sold in reels containing 3000 units.

Specifications

• Supply Voltage Range: 1.6V to 5.5V
• Reset Threshold Voltage: 4.75V
• Reset Timeout Period: 140ms (typical)
• Quiescent Current: 1.5µA (typical)
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The MCP131T-475E/LB has three pins:

1. VDD: This pin is connected to the positive supply voltage.
2. GND: This pin is connected to the ground or negative supply voltage.
3. RESET: This pin outputs a reset signal when the monitored voltage drops below the threshold.

Functional Features

• Under-Voltage Monitoring: The MCP131T-475E/LB continuously monitors the supply voltage and generates a reset signal if it falls below the specified threshold.
• Reset Timeout: The device includes a reset timeout feature that ensures the reset signal remains active for a specific period, even if the voltage returns to an acceptable level momentarily.
• Manual Reset Input: It provides an additional pin for manual reset input, allowing external control over the reset function.
• Power-On Reset: The MCP131T-475E/LB generates a reset signal upon power-up, ensuring proper initialization of the system.

Advantages and Disadvantages

Advantages

• Accurate voltage monitoring ensures reliable operation of electronic circuits.
• Low power consumption extends battery life in portable devices.
• Small package size enables compact designs.
• Wide operating temperature range allows for use in various environments.

Disadvantages

• Limited to voltage monitoring functionality and does not provide other supervisory features.
• May require additional components for more complex applications.

Working Principles

The MCP131T-475E/LB operates by comparing the supply voltage with the preset threshold voltage. If the supply voltage drops below the threshold, the device triggers a reset signal. This signal remains active for a specified timeout period, even if the voltage momentarily recovers. The reset signal is released once the voltage rises above the threshold or after the timeout period elapses.

Application Field Plans

The MCP131T-475E/LB finds applications in various fields, including:

1. Battery-Powered Devices: It ensures proper functioning and prevents damage due to low voltage conditions in portable electronics such as smartphones, tablets, and wearables.
2. Industrial Control Systems: The voltage supervisor protects critical components from voltage fluctuations in industrial automation systems.
3. Automotive Electronics: It monitors the supply voltage in automotive applications, preventing malfunctions caused by voltage variations.

Alternative Models

Several alternative models offer similar functionality to the MCP131T-475E/LB. Some notable alternatives include:

1. MAX809: Manufactured by Maxim Integrated, this voltage supervisor offers a wide range of reset threshold options and package choices.
2. TPS3839: Texas Instruments produces this device, which features adjustable reset thresholds and low quiescent current.
3. ADM6315: Analog Devices offers this voltage supervisor with a manual reset input and a small SOT-23 package.

These alternative models provide comparable voltage monitoring capabilities and can be considered based on specific application requirements.

In conclusion, the MCP131T-475E/LB is a voltage supervisor that ensures reliable operation of electronic circuits by monitoring the supply voltage. Its low power consumption, compact size, and wide temperature range make it suitable for various applications. However, it is important to consider alternative models based on specific needs.