TPS3126E18DBVR

Basic Information Overview

Category: Integrated Circuits (ICs)

Use: Voltage Supervisors

Characteristics: - Low Quiescent Current - Wide Supply Voltage Range - Adjustable Threshold Voltage - Power-On Reset Generator with Fixed Delay Time - Manual Reset Input - Open-Drain Output - Small Package Size

Package: SOT-23 (DBV)

Essence: The TPS3126E18DBVR is a voltage supervisor IC that monitors the power supply voltage of a system and provides a reset signal to the microcontroller or other devices when the voltage drops below a certain threshold.

Packaging/Quantity: The TPS3126E18DBVR is available in tape and reel packaging, with 3000 units per reel.

Specifications

• Supply Voltage Range: 1.2V to 6.5V
• Threshold Voltage Options: 1.8V
• Quiescent Current: 1.5µA (typical)
• Power-On Reset Delay Time: 200ms (typical)
• Manual Reset Input Threshold Voltage: 0.4V (typical)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The TPS3126E18DBVR has the following pin configuration:

1. GND (Ground)
2. MR (Manual Reset Input)
3. VDD (Supply Voltage)
4. RESET (Reset Output)

Functional Features

• Power-On Reset Generation: The TPS3126E18DBVR generates a reset signal when the supply voltage rises above the threshold voltage after being below it.
• Manual Reset Input: The MR pin allows for an external manual reset input, which can be used to force a reset regardless of the supply voltage.
• Open-Drain Output: The RESET pin is an open-drain output, allowing for easy interfacing with other devices.
• Adjustable Threshold Voltage: The threshold voltage can be adjusted by selecting the appropriate version of the TPS3126E18DBVR.

Advantages and Disadvantages

Advantages: - Low quiescent current helps in reducing power consumption. - Wide supply voltage range allows for compatibility with various systems. - Adjustable threshold voltage provides flexibility in different applications. - Small package size enables space-saving designs.

Disadvantages: - Limited threshold voltage options may not suit all voltage monitoring requirements. - Lack of built-in hysteresis may result in potential noise-related issues.

Working Principles

The TPS3126E18DBVR works by continuously monitoring the supply voltage. When the voltage drops below the threshold voltage, the internal circuitry triggers a reset signal. This signal remains active until the supply voltage rises above the threshold voltage again. The manual reset input allows for an external trigger to force a reset, regardless of the supply voltage.

Detailed Application Field Plans

The TPS3126E18DBVR is commonly used in various applications where reliable voltage monitoring and system reset functionality are required. Some of the typical application fields include:

1. Microcontroller Systems: The TPS3126E18DBVR ensures proper operation of microcontrollers by providing a reset signal when the supply voltage falls below the specified threshold.

2. Industrial Control Systems: It is used in industrial control systems to monitor the power supply voltage and initiate a system reset if necessary.

3. Battery-Powered Devices: The TPS3126E18DBVR helps in extending battery life by monitoring the voltage and initiating a shutdown or low-power mode when the voltage drops below a certain level.

4. Automotive Electronics: It finds applications in automotive electronics to ensure stable operation and protection against voltage fluctuations.

Detailed and Complete Alternative Models

Some alternative models to the TPS3126E18DBVR that offer similar functionality are:

1. TPS3125E18DBVR
2. TPS3128E18DBVR
3. TPS3126E25DBVR
4. TPS3125E25DBVR

These alternative models have different threshold voltage options or package sizes, allowing for flexibility in various design requirements.

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