TPS3808G30DRVT

Overview

Category: Integrated Circuits (ICs)

Use: Voltage Supervisors

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

Package: SOT-23-6

Essence: The TPS3808G30DRVT 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: Tape & Reel (3000 pieces 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
• Operating Temperature Range: -40°C to +85°C
• Quiescent Current: 1.5µA (typical)
• Reset Timeout Period: 200ms (typical)
• Watchdog Timeout Period: 1.6s (typical)
• Manual Reset Input Threshold Voltage: 0.4V (typical)

Pin Configuration

The TPS3808G30DRVT has a SOT-23-6 package with the following pin configuration:

```

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| | | 1 2| | 3 4| | 5 6| |____| ```

Pin 1: GND (Ground)

Pin 2: MR (Manual Reset Input)

Pin 3: VDD (Supply Voltage)

Pin 4: RESET (Reset Output)

Pin 5: GND (Ground)

Pin 6: VDD (Supply Voltage)

Functional Features

1. Voltage Monitoring: Monitors the supply voltage and generates a reset signal when it falls below the threshold voltage.
2. Adjustable Threshold Voltage: The threshold voltage can be adjusted to match the specific requirements of the system.
3. Precision Monitoring: Provides accurate monitoring of the supply voltage with low hysteresis.
4. Manual Reset Input: Allows for manual reset of the system by asserting a low-level signal on the MR pin.
5. Watchdog Timer: Includes a watchdog timer that resets the system if a periodic signal is not received within the specified timeout period.
6. Power-On Reset Delay Time: Provides a delay time after power-on before generating the reset signal, allowing the system to stabilize.

Advantages and Disadvantages

Advantages: - Low power consumption - Wide supply voltage range - Adjustable threshold voltage - Precision monitoring - Manual reset capability - Watchdog timer for system reliability - Power-on reset delay for stability

Disadvantages: - Limited number of threshold voltage options

Working Principles

The TPS3808G30DRVT operates by continuously monitoring the supply voltage using an internal voltage reference. When the voltage falls below the set threshold, the reset output is asserted, indicating a power failure or low voltage condition. The reset output remains active until the voltage rises above the threshold and a specified timeout period has elapsed. The device also includes a watchdog timer that requires a periodic signal to be received within a certain time frame; otherwise, it will generate a reset signal.

Detailed Application Field Plans

The TPS3808G30DRVT is commonly used in various applications where reliable voltage monitoring and system reset functionality are required. Some typical application fields include:

1. Microcontrollers: Provides voltage supervision and reset functionality for microcontroller-based systems, ensuring proper operation and preventing data corruption during power fluctuations.
2. Embedded Systems: Monitors the supply voltage in embedded systems to ensure stable operation and protect sensitive components from voltage drops or spikes.
3. Industrial Control Systems: Used in industrial control systems to monitor power supply integrity and initiate system resets when necessary, improving overall system reliability.
4. Automotive Electronics: Provides voltage monitoring and reset capabilities in automotive electronics applications, protecting critical systems from voltage variations and ensuring safe operation.

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the TPS3808G30DRVT include:

1. MAX809: Voltage Supervisors with Adjustable Threshold
2. TL7705: Supply Voltage Supervisors with Watchdog Timer
3. ADM6315: Microprocessor Supervisory Circuits with Manual Reset Input
4. MIC803: Precision Voltage Detectors with Power-On Reset Delay

These alternative models can be considered based on specific application requirements and desired features.

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