TPS3851G18EQDRBRQ1

Basic Information Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Supervisor
• Characteristics: Precision, Low Power Consumption
• Package: VSON-10
• Essence: Monitoring and Resetting System
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 1.8V to 6.5V
• Threshold Voltage Options: 0.9V, 1.2V, 1.6V, 2.5V, 3.3V, 5V
• Operating Temperature Range: -40°C to +125°C
• Quiescent Current: 3.5µA (typical)
• Watchdog Timer Timeout Period: 1.6s (typical)

Detailed Pin Configuration

The TPS3851G18EQDRBRQ1 has the following pin configuration:

| Pin Number | Pin Name | Description | |------------|----------|-------------| | 1 | GND | Ground | | 2 | RESET | Active-Low Reset Output | | 3 | MR | Manual Reset Input | | 4 | VDD | Supply Voltage | | 5 | VIT | Internal Voltage Reference Output | | 6 | WDEN | Watchdog Enable Input | | 7 | WDOUT | Watchdog Timeout Output | | 8 | NC | No Connect | | 9 | NC | No Connect | | 10 | NC | No Connect |

Functional Features

• Monitors supply voltage and asserts reset when it falls below the threshold voltage.
• Provides a manual reset input for system initialization.
• Includes a watchdog timer to detect software or hardware failures.
• Offers a watchdog enable input for system control.
• Generates a timeout output signal when the watchdog timer expires.

Advantages and Disadvantages

Advantages: - High precision voltage monitoring. - Low power consumption. - Wide operating temperature range. - Small package size for space-constrained applications.

Disadvantages: - Limited threshold voltage options. - No built-in hysteresis for voltage monitoring.

Working Principles

The TPS3851G18EQDRBRQ1 is designed to monitor the supply voltage of a system. It compares the supply voltage with a user-defined threshold voltage. When the supply voltage falls below the threshold voltage, the device asserts a reset signal to initiate a system reset. The manual reset input allows the system to be initialized externally. The watchdog timer continuously monitors the system's operation. If the software or hardware fails to toggle the watchdog enable input within the specified timeout period, the device generates a timeout output signal.

Detailed Application Field Plans

The TPS3851G18EQDRBRQ1 is widely used in various applications that require voltage supervision and system reset functionality. Some common application fields include: - Automotive Electronics: Ensuring proper operation of critical automotive systems such as engine control units (ECUs), safety systems, and infotainment systems. - Industrial Control Systems: Monitoring voltage levels in industrial automation equipment, motor drives, and power supplies to prevent damage and ensure reliable operation. - Medical Devices: Providing voltage supervision in medical equipment to guarantee patient safety and prevent malfunctions. - Consumer Electronics: Incorporating voltage monitoring and reset capabilities in devices like smartphones, tablets, and gaming consoles to enhance reliability.

Detailed and Complete Alternative Models

• TPS3850: Similar voltage supervisor IC with adjustable threshold voltage options.
• TPS3839: Voltage supervisor IC with higher threshold voltage options and additional features like power-on reset delay.
• MAX823: Voltage supervisor IC with integrated power-on reset and watchdog timer.
• LTC2937: Precision voltage supervisor IC with adjustable threshold voltage and programmable delay.

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