TPS3809K33DBVT

Overview

Category: Integrated Circuits (ICs)

Use: Voltage Supervisors

Characteristics: - Monitors voltage levels to ensure proper system operation - Provides reset signals during power-up, power-down, and brownout conditions - Low quiescent current consumption - Wide operating voltage range - Small package size for space-constrained applications

Package: SOT-23 (DBV)

Essence: The TPS3809K33DBVT is a voltage supervisor IC that ensures stable and reliable operation of electronic systems by monitoring the voltage levels. It provides reset signals during power-up, power-down, and brownout conditions, preventing data corruption and ensuring proper system initialization.

Packaging/Quantity: The TPS3809K33DBVT is available in tape and reel packaging, with 3000 units per reel.

Specifications

• Supply Voltage Range: 1.8V to 6.5V
• Threshold Voltage: 3.08V
• Reset Timeout Period: 200ms
• Quiescent Current: 2µA (typical)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The TPS3809K33DBVT has the following pin configuration:

```

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| | --| RESET |-- --| GND |-- --| VDD |-- --| MR |-- |_______| ```

• RESET: Output pin for reset signal
• GND: Ground connection
• VDD: Power supply input
• MR: Manual reset input (active low)

Functional Features

• Voltage Monitoring: The TPS3809K33DBVT continuously monitors the supply voltage and generates a reset signal when the voltage falls below the threshold level.
• Reset Signal Generation: During power-up, power-down, or brownout conditions, the IC generates a reset signal to ensure proper system initialization and prevent data corruption.
• Manual Reset Input: The MR pin allows for manual reset control, enabling external devices to initiate a system reset.

Advantages

• Reliable System Operation: The TPS3809K33DBVT ensures stable operation by monitoring voltage levels and providing reset signals when necessary.
• Low Power Consumption: With a quiescent current of only 2µA, the IC minimizes power consumption, making it suitable for battery-powered applications.
• Wide Operating Voltage Range: The IC can operate within a wide voltage range of 1.8V to 6.5V, accommodating various system requirements.
• Small Package Size: The SOT-23 package offers a compact form factor, ideal for space-constrained applications.

Disadvantages

• Lack of Adjustable Threshold: The TPS3809K33DBVT has a fixed threshold voltage of 3.08V, limiting its flexibility in certain applications that require adjustable thresholds.
• Single Reset Timeout Period: The IC has a fixed reset timeout period of 200ms, which may not be suitable for all system requirements.

Working Principles

The TPS3809K33DBVT operates by continuously monitoring the supply voltage using an internal voltage reference. When the voltage falls below the threshold level (3.08V), the IC generates a reset signal on the RESET pin. This signal remains active until the voltage rises above the threshold and the reset timeout period (200ms) elapses.

Application Field Plans

The TPS3809K33DBVT is commonly used in various electronic systems where stable voltage monitoring and reliable system initialization are crucial. Some application fields include:

1. Microcontrollers and Microprocessors: Ensuring proper initialization and preventing data corruption during power-up and brownout conditions.
2. Industrial Control Systems: Providing reliable reset signals to maintain system integrity and prevent malfunctions.
3. Automotive Electronics: Monitoring voltage levels in automotive systems to ensure safe and reliable operation.
4. Battery-Powered Devices: Protecting battery-powered devices from undervoltage conditions and ensuring proper shutdown during power-down.

Alternative Models

1. TPS3809I33DBVT: Similar to TPS3809K33DBVT, but with a threshold voltage of 3.3V.
2. TPS3809J33DBVT: Similar to TPS3809K33DBVT, but with a threshold voltage of 3.3V and an extended operating temperature range (-40°C to +125°C).
3. TPS3809L30DBVT: Similar to TPS3809K33DBVT, but with a threshold voltage of 3.0V.

These alternative models offer different threshold voltages and temperature ranges to cater to specific application requirements.

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