TPS2105DBVTG4

Product Overview

Category

The TPS2105DBVTG4 belongs to the category of integrated circuits (ICs) and specifically falls under the voltage supervisors or voltage monitors subcategory.

Use

This product is primarily used for monitoring and supervising voltage levels in electronic systems. It ensures that the voltage remains within a specified range, triggering appropriate actions if the voltage exceeds or falls below the set thresholds.

Characteristics

• Voltage Range: The TPS2105DBVTG4 operates within a voltage range of 1.8V to 5.5V.
• Low Power Consumption: This IC consumes minimal power, making it suitable for battery-powered devices.
• Adjustable Thresholds: The voltage thresholds can be adjusted according to the specific requirements of the system.
• Reset Delay: The TPS2105DBVTG4 provides a programmable reset delay to prevent false triggering during power-up or voltage fluctuations.
• Small Package Size: It comes in a small SOT-23 package, allowing for space-efficient integration into various electronic designs.

Package and Quantity

The TPS2105DBVTG4 is available in a SOT-23 package. It is typically sold in reels containing 3000 units per reel.

Specifications

• Supply Voltage Range: 1.8V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Reset Threshold Accuracy: ±1.5%
• Reset Timeout Period: Programmable from 1ms to 640ms
• Quiescent Current: 3µA (typical)

Pin Configuration

The TPS2105DBVTG4 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 is used to monitor the voltage level and provide a reset signal when necessary.

Functional Features

• Voltage Monitoring: The TPS2105DBVTG4 continuously monitors the voltage level at the VDD pin.
• Reset Generation: If the voltage falls below or exceeds the set thresholds, the IC generates a reset signal on the RESET pin.
• Programmable Delay: The reset delay can be adjusted to prevent false triggering during power-up or voltage fluctuations.
• Power-On Reset: The IC ensures a reliable reset signal during power-up, eliminating any uncertainty in the system's initial state.

Advantages and Disadvantages

Advantages

• Wide Operating Voltage Range: The TPS2105DBVTG4 can operate within a broad range of supply voltages, making it versatile for various applications.
• Low Power Consumption: Its low quiescent current enables energy-efficient operation, particularly in battery-powered devices.
• Adjustable Thresholds: The ability to adjust the voltage thresholds allows customization based on specific system requirements.
• Small Package Size: The compact SOT-23 package facilitates space-saving integration into electronic designs.

Disadvantages

• Limited Reset Timeout Range: The programmable reset timeout period has a maximum limit of 640ms, which may not be sufficient for certain applications requiring longer delays.
• Single Voltage Monitoring: The TPS2105DBVTG4 only monitors a single voltage source, limiting its use in systems with multiple power domains.

Working Principles

The TPS2105DBVTG4 operates by comparing the voltage at the VDD pin with the internally set threshold levels. If the voltage falls below or exceeds these thresholds, the IC triggers a reset signal on the RESET pin. The reset delay can be programmed to avoid false triggering during power-up or voltage transients.

Application Field Plans

The TPS2105DBVTG4 finds application in various electronic systems where voltage monitoring and reliable reset generation are crucial. Some potential application fields include:

1. Microcontrollers: Ensuring stable power supply and preventing data corruption during voltage fluctuations.
2. Industrial Automation: Monitoring critical voltage levels in control systems to prevent equipment damage or malfunction.
3. Automotive Electronics: Providing reliable reset signals for safety-critical systems, such as airbag deployment circuits.
4. Battery-Powered Devices: Protecting batteries from over-discharge by triggering a shutdown when the voltage drops below a safe threshold.

Alternative Models

For those seeking alternative options, the following models offer similar functionality to the TPS2105DBVTG4:

1. TPS3808G01DBVR
2. MAX809SEUR-T
3. ADM708TARZ

These alternatives can be considered based on specific requirements and availability.

In conclusion, the TPS2105DBVTG4 is an integrated circuit used for voltage monitoring and reset generation. Its adjustable thresholds, low power consumption, and small package size make it suitable for various applications. However, limitations such as the maximum reset timeout period and single voltage monitoring should be taken into