Overview
The TPS3828-33DBVR is a voltage supervisor IC manufactured by Texas Instruments, designed to monitor the power supply voltage of digital systems such as microprocessors, microcontrollers, and FPGAs. It ensures reliable system operation by generating a reset signal when the supply voltage falls below a predefined threshold. The device is housed in a compact SOT-23 package, making it suitable for space-constrained applications. This IC is commonly used in automotive, industrial, and consumer electronics, where stable voltage monitoring is critical. Its low quiescent current (typically 1.1 µA) makes it ideal for battery-powered devices, extending battery life while maintaining system reliability.
Structure and Working Principle
The TPS3828-33DBVR consists of a voltage reference, a comparator, and a delay timer. The voltage reference sets the threshold for monitoring, while the comparator continuously checks the input voltage against this threshold. If the input voltage drops below the threshold, the comparator triggers the delay timer, which then asserts the reset signal after a programmable delay period. The reset delay time can be adjusted using an external capacitor, allowing flexibility in system design. The IC operates over a wide voltage range (1.8V to 6.5V), making it versatile for various applications. Its small footprint and minimal external component requirements simplify PCB design.
Key Features
One of the standout features of the TPS3828-33DBVR is its ultra-low power consumption, with a typical quiescent current of just 1.1 µA. This makes it highly suitable for battery-operated devices where power efficiency is paramount. The device also offers an adjustable reset delay, which can be tailored to specific system requirements using an external capacitor. Additionally, the TPS3828-33DBVR has a fixed voltage threshold of 3.3V, ensuring precise monitoring for 3.3V systems. Its wide operating temperature range (-40°C to +125°C) allows it to function reliably in harsh environments, including automotive and industrial settings.
Application Areas
The TPS3828-33DBVR is widely used in applications requiring reliable voltage monitoring and system reset functionality. In automotive systems, it ensures that microcontrollers and other digital components reset properly during power-up or voltage dips. Industrial control systems also benefit from its robust performance in noisy environments. Consumer electronics, such as smart home devices and portable gadgets, utilize this IC to enhance system stability and prevent malfunctions due to power fluctuations. Its small size and low power consumption make it particularly attractive for IoT devices and wearable technology.
Maintenance and Precautions
To ensure optimal performance of the TPS3828-33DBVR, it is important to follow proper PCB layout guidelines. Place the IC close to the monitored voltage rail to minimize noise and voltage drops. Use a bypass capacitor near the VDD pin to filter high-frequency noise and ensure stable operation. Avoid exposing the device to voltages beyond its specified range, as this can cause permanent damage. When designing the reset delay, ensure the external capacitor value is chosen to meet the system's timing requirements. Regularly test the reset functionality during system development to confirm proper operation.
B2B Procurement Guide
When procuring the TPS3828-33DBVR, consider purchasing from authorized distributors or directly from Texas Instruments to ensure authenticity and reliability. Bulk orders typically offer cost savings, with prices ranging from approximately $0.50 to $1.50 per unit depending on quantity and supplier. Check for lead times and stock availability, especially for large-scale production runs. Verify the device's specifications match your application requirements, including voltage threshold, reset delay, and operating temperature range. Sample orders are recommended for initial testing and validation before committing to large quantities.
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