TPS3851H18EDRBR

Overview

Product Category

The TPS3851H18EDRBR 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: 0.8V to 5.5V
• Adjustable threshold voltage
• Low quiescent current consumption
• Wide operating temperature range: -40°C to 125°C
• Small package size: 6-pin WSON

Package and Quantity

The TPS3851H18EDRBR is available in a 6-pin WSON package. It is typically sold in reels containing a quantity of 2500 units.

Specifications

• Supply voltage range: 0.8V to 5.5V
• Threshold voltage accuracy: ±1%
• Quiescent current: 2.5µA (typical)
• Power-on reset delay time: 200ms (typical)
• Watchdog timer timeout period: 1.6s (typical)
• Operating temperature range: -40°C to 125°C

Pin Configuration

The TPS3851H18EDRBR has the following pin configuration:

```

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

• VDD: Supply voltage input
• GND: Ground reference
• RESET: Active-low reset output
• MR: Manual reset input
• WD: Watchdog timer input

Functional Features

1. Voltage Monitoring: The TPS3851H18EDRBR continuously monitors the supply voltage and generates a reset signal when it falls below a programmable threshold.
2. Power-On Reset: It provides a power-on reset signal to ensure proper initialization of the system during power-up.
3. Watchdog Timer: The integrated watchdog timer monitors the system's operation and generates a reset signal if it detects a fault or system lock-up.
4. Manual Reset: The manual reset input allows for an external reset signal to be applied, overriding the internal monitoring circuitry.

Advantages and Disadvantages

Advantages

• Wide operating voltage range allows for compatibility with various electronic systems.
• Adjustable threshold voltage provides flexibility in voltage monitoring applications.
• Low quiescent current consumption minimizes power consumption in battery-powered devices.
• Small package size enables space-saving designs.

Disadvantages

• Limited number of pins may restrict the integration of additional features.
• Lack of built-in hysteresis may result in potential noise-related issues in certain applications.

Working Principles

The TPS3851H18EDRBR operates by continuously monitoring the supply voltage using an internal voltage reference and comparator. When the voltage falls below the programmable threshold, the device asserts the reset output, indicating a voltage fault. The integrated watchdog timer ensures that the system remains operational by periodically resetting the timer. If the timer is not reset within the specified timeout period, a reset signal is generated, indicating a fault or system lock-up.

Application Field Plans

The TPS3851H18EDRBR finds application in various fields, including:

1. Industrial Automation: Voltage supervision in control systems, motor drives, and PLCs.
2. Automotive Electronics: Monitoring voltage levels in automotive ECUs, infotainment systems, and lighting controls.
3. Consumer Electronics: Power management in smartphones, tablets, and wearable devices.
4. Internet of Things (IoT): Voltage monitoring in smart home devices, sensors, and IoT gateways.

Alternative Models

1. TPS3839K33DBVR: 3.3V voltage supervisor with fixed threshold voltage.
2. TPS3860008DRCR: Adjustable threshold voltage supervisor with integrated power-on reset and watchdog timer.
3. TPS3809I50DBVR: 5.0V voltage supervisor with manual reset input.

These alternative models offer similar functionality and can be considered as alternatives to the TPS3851H18EDRBR in specific applications.

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