TPS3809L30DBVT

Basic Information Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Supervisor
• Characteristics: Low Power, Precision Monitoring, Programmable Delay
• Package: SOT-23 (DBV)
• 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
• Reset Threshold Voltage: 3.0V
• Reset Timeout Period: Programmable from 1ms to 10s
• Quiescent Current: 2µA (typical)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The TPS3809L30DBVT has the following pin configuration:

1. GND: Ground connection
2. RESET: Active-low reset output
3. VDD: Positive supply voltage input

Functional Features

• Monitors the supply voltage and asserts a reset signal when it falls below the threshold voltage.
• Provides a programmable delay before asserting the reset signal.
• Offers hysteresis to prevent false triggering due to noise or voltage fluctuations.
• Low quiescent current consumption for power-sensitive applications.

Advantages and Disadvantages

Advantages: - Wide supply voltage range allows compatibility with various systems. - Programmable delay feature enables customization for specific application requirements. - Low power consumption extends battery life in portable devices. - Small package size facilitates space-constrained designs.

Disadvantages: - Limited reset timeout period may not suit all applications requiring longer delays. - Single threshold voltage may not be suitable for systems with multiple voltage rails.

Working Principles

The TPS3809L30DBVT operates by continuously monitoring the supply voltage. When the voltage falls below the threshold voltage, the reset output is asserted low. The delay period can be programmed using an external capacitor connected to the CT pin. Once the delay period elapses, the reset output returns high.

Detailed Application Field Plans

The TPS3809L30DBVT finds applications in various fields, including: 1. Microcontroller Systems: Provides reliable power-on reset functionality. 2. Industrial Control Systems: Ensures proper system initialization after power-up. 3. Automotive Electronics: Monitors supply voltage for safety-critical systems. 4. Battery-Powered Devices: Prevents erratic behavior due to low battery voltage. 5. Communication Equipment: Facilitates controlled restarts during power outages.

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the TPS3809L30DBVT include: - MAX809: Low-power microprocessor reset circuits from Maxim Integrated. - ADM708: Voltage monitoring circuits with adjustable reset timeout from Analog Devices. - MCP101: Precision voltage supervisor with programmable delay from Microchip Technology. - NCP302: Voltage detector with adjustable reset threshold and timeout from ON Semiconductor.

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