TPS3839K50DBZT

Product Overview

Category

The TPS3839K50DBZT belongs to the category of voltage supervisors.

Use

This product is primarily used for monitoring and supervising voltage levels in electronic systems.

Characteristics

• Voltage Range: 0.5V to 5.5V
• Accuracy: ±1%
• Quiescent Current: 2.5µA (typical)
• Operating Temperature Range: -40°C to +125°C
• Output Type: Active Low, Open Drain
• Package Type: SOT-23-3
• RoHS Compliant: Yes

Package and Quantity

The TPS3839K50DBZT is available in a small SOT-23-3 package. It is typically sold in reels or tubes containing multiple units.

Specifications

• Supply Voltage Range: 0.5V to 5.5V
• Threshold Voltage: 4.63V to 4.75V
• Hysteresis Voltage: 20mV to 100mV
• Reset Timeout Period: 200ms to 10s
• Quiescent Current: 2.5µA (typical)
• Power-On Reset Delay: 20ms (typical)

Pin Configuration

The TPS3839K50DBZT has three pins:

1. GND: Ground pin
2. VDD: Supply voltage input
3. RESET: Active low reset output

Functional Features

• Undervoltage Detection: Monitors supply voltage and asserts reset when it falls below the threshold voltage.
• Precision Monitoring: Provides accurate voltage monitoring with a low tolerance of ±1%.
• Active Low Reset: The RESET pin goes low when the monitored voltage drops below the threshold, indicating a reset condition.
• Open Drain Output: The RESET pin is an open drain output, allowing easy interfacing with other devices.
• Power-On Reset Delay: Ensures a stable reset signal during power-up by delaying the assertion of the reset output.

Advantages and Disadvantages

Advantages

• Wide operating voltage range allows compatibility with various systems.
• Low quiescent current minimizes power consumption.
• Accurate voltage monitoring ensures reliable system operation.
• Small package size enables space-saving designs.
• RoHS compliance for environmentally friendly applications.

Disadvantages

• Limited reset timeout period may not be suitable for all applications requiring longer delays.
• Active low reset output may require additional circuitry for certain system configurations.

Working Principles

The TPS3839K50DBZT operates by continuously monitoring the supply voltage. When the voltage falls below the threshold level, the device asserts the active low reset output, indicating a reset condition. The reset output remains low until the voltage rises above the threshold and the reset timeout period elapses.

Application Field Plans

The TPS3839K50DBZT finds application in various electronic systems that require reliable voltage monitoring and reset functionality. Some potential fields of application include:

1. Microcontrollers and Microprocessors: Ensuring proper system initialization and preventing erratic behavior during power-up or voltage fluctuations.
2. Industrial Control Systems: Providing voltage supervision to critical components, ensuring safe and reliable operation.
3. Automotive Electronics: Monitoring battery voltage and triggering appropriate actions in case of undervoltage conditions.
4. Power Management Systems: Enabling efficient power management by detecting abnormal voltage levels and initiating corrective measures.

Alternative Models

For those seeking alternative options, the following models offer similar functionality:

1. TPS3839L30DBZT: Low voltage version with a threshold voltage of 3.0V.
2. TPS3839H33DBZT: High voltage version with a threshold voltage of 3.3V.
3. TPS3839J25DBZT: Intermediate voltage version with a threshold voltage of 2.5V.

These alternative models can be considered based on specific voltage requirements and system constraints.

In conclusion, the TPS3839K50DBZT is a voltage supervisor that offers accurate monitoring and reset functionality for various electronic systems. Its small package size, low quiescent current, and wide operating voltage range make it suitable for diverse applications. However, its limited reset timeout period and active low reset output should be considered when selecting this device for specific designs.