TPS3808G25DRVR

Overview

Category: Integrated Circuits (ICs)

Use: Voltage Supervisors

Characteristics: - Low Power Consumption - Wide Supply Voltage Range - Adjustable Threshold Voltage - Precision Monitoring - Manual Reset Input - Open Drain Output - Small Package Size

Package: SOT-23-5

Essence: The TPS3808G25DRVR 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: 2.5V
• Quiescent Current: 3 µA (typical)
• Operating Temperature Range: -40°C to +85°C
• Output Type: Open Drain
• Manual Reset Input: Active-Low
• Power-On Reset Delay Time: 200 ms (typical)

Pin Configuration

The TPS3808G25DRVR has a SOT-23-5 package with the following pin configuration:

____ VDD| |GND MR | |DO GND|____|DO

• VDD: Supply Voltage
• GND: Ground
• MR: Manual Reset Input
• DO: Open Drain Output

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 using external resistors.
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 pulling the MR pin low.
5. Open Drain Output: The DO pin is an open drain output that can be pulled low to indicate a reset condition.

Advantages and Disadvantages

Advantages: - Low power consumption - Wide supply voltage range - Adjustable threshold voltage - Precision monitoring - Small package size

Disadvantages: - Limited threshold voltage options (2.5V only) - No built-in watchdog timer

Working Principles

The TPS3808G25DRVR works by continuously monitoring the supply voltage using an internal voltage reference. When the voltage falls below the threshold voltage, the IC generates a reset signal by pulling the DO pin low. The reset signal remains active until the supply voltage rises above the threshold voltage again. The manual reset input (MR) allows for an external reset signal to override the internal monitoring.

Detailed Application Field Plans

The TPS3808G25DRVR is commonly used in various applications where reliable voltage monitoring is required. Some of the typical application fields include:

1. Microcontrollers: Provides a reset signal to microcontrollers when the supply voltage drops below a certain level, ensuring proper system initialization.
2. Embedded Systems: Monitors the power supply voltage of embedded systems to prevent data corruption or system malfunction during power fluctuations.
3. Battery-Powered Devices: Ensures safe operation of battery-powered devices by monitoring the battery voltage and initiating a reset if it falls below a critical level.
4. Industrial Control Systems: Used in industrial control systems to monitor the power supply voltage and ensure stable operation of critical equipment.

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the TPS3808G25DRVR are:

1. MAX809: Voltage Supervisors with adjustable threshold voltage and various package options.
2. TLV803: Low Power Voltage Supervisors with adjustable threshold voltage and wide supply voltage range.
3. ADM6315: Microprocessor Supervisory Circuits with adjustable threshold voltage and manual reset input.

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

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