TPS3851G18EDRBT - English Editing Encyclopedia Entry

Product Overview

Category

The TPS3851G18EDRBT belongs to the category of integrated circuits (ICs) and specifically falls under the family of voltage supervisors.

Use

This product is primarily used for monitoring and supervising the voltage levels in electronic systems. It ensures that the voltage remains within specified limits, triggering appropriate actions when deviations occur.

Characteristics

• Voltage supervision range: The TPS3851G18EDRBT can monitor voltages ranging from 0.4V to 5.5V.
• Low quiescent current: It consumes minimal power during operation, making it suitable for battery-powered applications.
• Adjustable threshold voltage: The device allows users to set the desired voltage threshold for monitoring.
• Wide operating temperature range: It can operate reliably in temperatures ranging from -40°C to 125°C.

Package and Quantity

The TPS3851G18EDRBT is available in a small 6-pin WSON package, which offers compactness and ease of integration into various electronic systems. It is typically sold in reels containing a quantity of 2500 units.

Specifications

• Supply voltage range: 1.8V to 5.5V
• Quiescent current: 2.5µA (typical)
• Threshold voltage accuracy: ±1%
• Power-on reset delay time: 200ms (typical)
• Watchdog timer timeout period: 1.6s (typical)
• Operating temperature range: -40°C to 125°C

Detailed Pin Configuration

The TPS3851G18EDRBT features the following pin configuration:

1. GND: Ground reference for the IC.
2. VDD: Positive supply voltage input.
3. MR: Manual reset input pin.
4. RESET: Active-low reset output.
5. VIT: Voltage input for threshold setting.
6. WD: Watchdog timer input.

Functional Features

Voltage Monitoring

The TPS3851G18EDRBT continuously monitors the voltage level at the VIT pin. If the voltage falls below or exceeds the user-defined threshold, the device triggers a reset signal on the RESET pin, indicating a fault condition.

Manual Reset

The MR pin allows users to manually assert a reset signal, overriding the voltage monitoring functionality. This feature is useful during system testing or when a controlled reset is required.

Watchdog Timer

The integrated watchdog timer ensures that the system remains operational by periodically resetting it. If the watchdog timer input (WD) is not toggled within the specified timeout period, the TPS3851G18EDRBT generates a reset signal to prevent system lock-up.

Advantages and Disadvantages

Advantages

• Wide operating voltage range enables compatibility with various electronic systems.
• Low quiescent current consumption prolongs battery life in portable devices.
• Adjustable threshold voltage provides flexibility for different voltage monitoring requirements.
• Compact package size facilitates integration into space-constrained designs.

Disadvantages

• Limited number of pins may restrict the device's ability to interface with multiple components directly.
• Lack of built-in hysteresis may result in potential oscillations near the threshold voltage.

Working Principles

The TPS3851G18EDRBT operates based on a voltage comparator circuit. It compares the voltage at the VIT pin with the user-defined threshold voltage. If the monitored voltage deviates from the set threshold, the comparator triggers a reset signal, which can be used to initiate corrective actions or system shutdown.

Detailed Application Field Plans

The TPS3851G18EDRBT finds applications in various fields, including but not limited to: - Battery-powered devices: It ensures proper voltage monitoring and prevents excessive discharge, enhancing battery life. - Industrial automation: The device can be used to monitor power supply voltages in control systems, triggering appropriate actions during fault conditions. - Automotive electronics: It provides voltage supervision for critical components, ensuring reliable operation and protecting against potential damage.

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the TPS3851G18EDRBT include: - TPS3839K33DBVR - MAX823LEUK-T - ADM708TARZ