TPS3818G25DRVT

Basic Information Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Supervisor
• Characteristics: Precision, Low Power Consumption
• Package: SOT-23-5
• Essence: Monitors and Resets System Voltage
• Packaging/Quantity: Tape and Reel, 3000 pieces per reel

Specifications

• Supply Voltage Range: 1.6V to 6.5V
• Threshold Voltage Options: 2.25V, 2.5V, 2.63V, 2.93V, 3.08V, 3.3V, 4.38V, 4.63V
• Accuracy: ±1%
• Quiescent Current: 7µA (typical)
• Power-On Reset Delay Time: 200ms (typical)
• Watchdog Timer Timeout Period: 1.6s (typical)

Detailed Pin Configuration

The TPS3818G25DRVT has a total of five pins:

1. GND: Ground pin
2. VDD: Positive supply voltage input
3. MR: Manual reset input
4. RESET: Active-low reset output
5. WDI: Watchdog input

Functional Features

• Voltage Monitoring: The TPS3818G25DRVT continuously monitors the system voltage and asserts the reset signal when it falls below the threshold voltage.
• Manual Reset: The MR pin allows for manual resetting of the system by pulling it low.
• Watchdog Timer: The device includes a watchdog timer that requires a periodic input signal on the WDI pin to prevent system lock-up.

Advantages and Disadvantages

Advantages: - High precision voltage monitoring - Low power consumption - Small package size - Wide supply voltage range

Disadvantages: - Limited threshold voltage options

Working Principles

The TPS3818G25DRVT operates by comparing the system voltage with a fixed threshold voltage. When the system voltage drops below the threshold, the reset output is asserted, indicating a power failure or low voltage condition. The device also includes a watchdog timer that requires a periodic input signal to prevent system lock-up.

Detailed Application Field Plans

The TPS3818G25DRVT is commonly used in various applications where reliable voltage monitoring and system reset functionality are required. Some typical application fields include:

1. Microcontrollers: Ensuring proper system initialization and preventing data corruption during power fluctuations.
2. Industrial Control Systems: Monitoring power supply integrity and initiating system resets in case of voltage anomalies.
3. Automotive Electronics: Protecting sensitive electronic components from voltage dips and spikes.
4. Battery-Powered Devices: Preventing excessive discharge and ensuring safe operation.

Detailed and Complete Alternative Models

• TPS3818G01: Threshold voltage options: 1.6V, 2.1V, 2.5V, 2.63V, 2.93V
• TPS3818G33: Threshold voltage options: 2.25V, 2.5V, 2.63V, 2.93V, 3.08V, 3.3V

These alternative models offer similar functionality but with different threshold voltage options to suit specific application requirements.

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