TPS3808G18DBVR

Basic Information Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Supervisor
• Characteristics: Low Power, Precision Monitoring, Programmable Delay Time
• Package: SOT-23 (Small Outline Transistor)
• Essence: Supervises voltage levels and provides reset signals to microcontrollers and other digital systems.
• Packaging/Quantity: Tape and Reel, 3000 units per reel

Specifications

• Supply Voltage Range: 1.6V to 6.5V
• Threshold Voltage Options: 1.8V, 2.5V, 3.3V, 5V
• Reset Timeout Period: Programmable from 1ms to 10s
• Operating Temperature Range: -40°C to +85°C
• Quiescent Current: 4µA (typical)

Detailed Pin Configuration

The TPS3808G18DBVR has a total of 5 pins:

1. GND: Ground connection
2. VDD: Positive supply voltage input
3. MR: Manual Reset input (active-low)
4. RESET: Reset output signal
5. N/C: No Connection (unused pin)

Functional Features

• Precision Monitoring: Monitors the supply voltage and compares it with the programmable threshold voltage.
• Programmable Delay Time: Allows users to set the timeout period for the reset signal.
• Manual Reset Input: Provides an option for manual reset control.
• Reset Output Signal: Generates a reset signal when the monitored voltage falls below the threshold.

Advantages and Disadvantages

Advantages: - Low power consumption - Wide supply voltage range - Programmable delay time for flexibility - Small package size for space-constrained applications

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

Working Principles

The TPS3808G18DBVR operates by continuously monitoring the supply voltage. When the voltage falls below the programmable threshold, the reset output signal is activated. The reset signal remains active until the voltage rises above the threshold or the programmed timeout period elapses. The manual reset input allows users to manually assert a reset signal, overriding the automatic monitoring.

Detailed Application Field Plans

The TPS3808G18DBVR 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 initialization and safe operation of microcontroller-based systems.
2. Industrial Control Systems: Providing fault detection and recovery capabilities in industrial automation.
3. Automotive Electronics: Monitoring critical voltage levels in automotive electronic systems.
4. Power Management: Safeguarding power supplies and preventing damage due to undervoltage conditions.
5. Battery-Powered Devices: Protecting battery-powered devices from excessive discharge.

Detailed and Complete Alternative Models

• TPS3809I50DBVR: Similar voltage supervisor IC with a fixed threshold voltage of 5V.
• TPS3836H30DBVR: Voltage supervisor IC with a higher threshold voltage of 3.0V.
• TPS3890QDRCRQ1: Automotive-grade voltage supervisor IC with additional features for automotive applications.

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