TPS3808G30DBVRG4

Overview

Category: Integrated Circuits (ICs)

Use: Voltage Supervisors

Characteristics: - Low Power Consumption - Wide Supply Voltage Range - Adjustable Threshold Voltage - Precision Monitoring - Manual Reset Input - Power-On Reset Delay Time - Watchdog Timer - Open-Drain Output

Package: SOT-23-5

Essence: The TPS3808G30DBVRG4 is a voltage supervisor IC that monitors the power supply voltage of a system and provides a reset signal to the microcontroller or other devices when the voltage falls below a certain threshold.

Packaging/Quantity: The TPS3808G30DBVRG4 is available in a SOT-23-5 package. It is typically sold in reels with a quantity of 3000 units per reel.

Specifications

• Supply Voltage Range: 1.6V to 6.5V
• Threshold Voltage Options: 2.93V, 3.08V, 3.3V, 3.63V, 4.38V, 4.63V, 4.75V, 5V
• Power-On Reset Delay Time: 200ms, 400ms, 600ms, 900ms
• Watchdog Timer Timeout Period: 1.6s, 3.1s, 6.3s, 12.5s

Pin Configuration

The TPS3808G30DBVRG4 has the following pin configuration:

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Pin 1: GND (Ground)

Pin 2: MR (Manual Reset Input)

Pin 3: VDD (Supply Voltage)

Pin 4: RESET (Reset Output)

Pin 5: GND (Ground)

Functional Features

1. Voltage Monitoring: The TPS3808G30DBVRG4 continuously monitors the supply voltage and asserts the reset signal when it falls below the programmed threshold voltage.

2. Adjustable Threshold Voltage: The threshold voltage can be adjusted to match the specific requirements of the system, allowing flexibility in voltage monitoring.

3. Precision Monitoring: The IC provides accurate voltage monitoring with a low voltage threshold accuracy of ±0.5%.

4. Manual Reset Input: The manual reset input allows for an external reset signal to override the internal voltage monitoring and assert the reset signal.

5. Power-On Reset Delay Time: The power-on reset delay time can be configured to provide a delay before asserting the reset signal after power is applied.

6. Watchdog Timer: The built-in watchdog timer can be used to monitor the activity of the microcontroller or other devices. If no activity is detected within the specified timeout period, the reset signal is asserted.

7. Open-Drain Output: The reset output is an open-drain output, which allows for easy interfacing with different logic levels.

Advantages and Disadvantages

Advantages: - Low power consumption - Wide supply voltage range - Adjustable threshold voltage - Precision monitoring - Manual reset input - Power-on reset delay time - Watchdog timer for system integrity - Open-drain output for flexible interfacing

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

Working Principles

The TPS3808G30DBVRG4 operates by comparing the supply voltage with the programmed threshold voltage. When the supply voltage falls below the threshold voltage, the reset output is asserted, indicating a power failure or an out-of-range voltage condition. The manual reset input can be used to override the internal voltage monitoring and manually assert the reset signal. The power-on reset delay time provides a delay before asserting the reset signal after power is applied, allowing the system to stabilize. The watchdog timer monitors the activity of the microcontroller or other devices and asserts the reset signal if no activity is detected within the specified timeout period.

Detailed Application Field Plans

The TPS3808G30DBVRG4 is commonly used in various applications where reliable voltage monitoring and system reset functionality are required. Some of the typical application fields include:

1. Embedded Systems: The IC ensures proper system initialization and prevents erratic behavior during power-up or power-down sequences in embedded systems.

2. Industrial Automation: It is used in industrial automation equipment to monitor the power supply voltage and provide a reset signal to ensure the safe operation of critical processes.

3. Consumer Electronics: The IC is employed in consumer electronic devices such as smartphones, tablets, and gaming consoles to prevent data corruption and ensure proper system operation during voltage fluctuations.

4. Automotive Electronics: It finds applications in automotive electronics for monitoring the