TPS3847108DBVR

Product Overview

Category

The TPS3847108DBVR belongs to the category of voltage supervisors.

Use

This product is primarily used for monitoring and supervising voltage levels in electronic systems.

Characteristics

• Voltage supervision range: 0.4V to 5.5V
• Adjustable threshold voltage
• Low quiescent current consumption
• Wide operating temperature range: -40°C to 125°C
• Small package size: SOT-23-5

Package and Quantity

The TPS3847108DBVR is available in a small SOT-23-5 package. It is typically sold in reels of 3000 units.

Specifications

• Supply voltage range: 0.4V to 5.5V
• Threshold voltage accuracy: ±1.5%
• Quiescent current: 2.5µA (typical)
• Power-on reset delay time: 200ms (typical)
• Watchdog timeout period: 1.6s (typical)

Pin Configuration

The TPS3847108DBVR has the following pin configuration:

```

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| | --| VDD | --| GND | --| MR | --| RESET | --| NRESET | |___________| ```

Functional Features

1. Voltage Monitoring: The TPS3847108DBVR continuously monitors the input voltage and compares it with the adjustable threshold voltage.
2. Reset Generation: When the input voltage falls below the threshold voltage, the device generates a reset signal to indicate a power failure or low voltage condition.
3. Power-On Reset Delay: The TPS3847108DBVR includes a power-on reset delay circuit that ensures stable operation during power-up.
4. Watchdog Timer: This device incorporates a watchdog timer that can be used to monitor the system's operation and reset it if necessary.

Advantages and Disadvantages

Advantages

• Wide operating voltage range allows for versatile applications.
• Adjustable threshold voltage provides flexibility in voltage monitoring.
• Low quiescent current consumption minimizes power consumption.
• Small package size enables space-efficient designs.
• Power-on reset delay ensures reliable system startup.

Disadvantages

• Limited number of available alternative models.
• Lack of advanced features compared to some higher-end voltage supervisors.

Working Principles

The TPS3847108DBVR operates by continuously monitoring the input voltage. When the voltage falls below the adjustable threshold voltage, the device generates a reset signal. This reset signal can be used to initiate appropriate actions in the system, such as shutting down or restarting.

The power-on reset delay circuit ensures that the reset signal is not generated immediately upon power-up, allowing the system to stabilize before normal operation begins. The watchdog timer feature helps monitor the system's operation and can reset it if it becomes unresponsive or fails to provide a periodic response.

Application Field Plans

The TPS3847108DBVR finds applications in various electronic systems where voltage monitoring and supervision are critical. Some potential application fields include:

1. Microcontrollers: Ensuring stable operation and preventing data corruption during power fluctuations.
2. Battery-Powered Devices: Monitoring battery voltage to prevent over-discharge and protect sensitive components.
3. Industrial Control Systems: Providing reliable reset signals in case of power failures or abnormal voltage conditions.
4. Automotive Electronics: Monitoring voltage levels in automotive systems to prevent damage and ensure safe operation.

Alternative Models

While the TPS3847108DBVR is a highly capable voltage supervisor, there are a few alternative models available in the market that offer similar functionality. Some notable alternatives include:

1. TPS3840: Similar voltage supervisor with adjustable threshold voltage and various package options.
2. MAX823: Voltage monitor with a wide operating temperature range and additional features like manual reset input.
3. ADM6315: Supervisory circuit with adjustable reset timeout period and low power consumption.

These alternative models can be considered based on specific application requirements and design constraints.

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