TPS3850G18QDRCRQ1

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 - Offers programmable delay time for reset assertion - Low quiescent current consumption - Wide operating voltage range - High accuracy and precision

Package: VSON-10 (Very Small Outline No-Lead)

Essence: The TPS3850G18QDRCRQ1 is a voltage supervisor IC designed to monitor voltage levels in electronic systems and provide reset signals when necessary. It ensures the reliable operation of the system by preventing improper functioning due to voltage fluctuations or power disruptions.

Packaging/Quantity: The TPS3850G18QDRCRQ1 is typically sold in reels containing 2500 units per reel.

Specifications

• Supply Voltage Range: 1.8V to 6.5V
• Operating Temperature Range: -40°C to +125°C
• Quiescent Current: 3 µA (typical)
• Reset Threshold Accuracy: ±1.5% (maximum)
• Delay Time Options: Programmable from 1 ms to 10 s
• Output Type: Active-Low, Open-Drain

Pin Configuration

The TPS3850G18QDRCRQ1 has the following pin configuration:

___________ | | NC |1 10| GND NC |2 9| RESET_N NC |3 8| VDD NC |4 7| MR NC |5 6| OUT |___________|

Functional Features

1. Voltage Monitoring: The TPS3850G18QDRCRQ1 continuously monitors the input voltage and compares it to a programmable threshold. It can detect undervoltage, overvoltage, and brownout conditions.

2. Reset Generation: When an abnormal voltage condition is detected, the TPS3850G18QDRCRQ1 asserts the RESET_N pin, providing a reset signal to the system. This ensures that the system restarts or enters a safe state to prevent data corruption or improper operation.

3. Programmable Delay Time: The IC allows users to set the delay time for reset assertion according to their specific requirements. This feature helps avoid false resets during power-up or transient voltage fluctuations.

4. Low Quiescent Current: The TPS3850G18QDRCRQ1 consumes minimal current in standby mode, contributing to overall power efficiency and extending battery life in portable applications.

Advantages and Disadvantages

Advantages: - Wide operating voltage range enables compatibility with various systems - High accuracy and precision ensure reliable voltage monitoring - Programmable delay time offers flexibility in system design - Low quiescent current consumption enhances power efficiency

Disadvantages: - Limited number of available pins for additional functionalities - Not suitable for high-voltage applications beyond the specified range

Working Principles

The TPS3850G18QDRCRQ1 operates by comparing the input voltage with a reference voltage internally generated within the IC. If the input voltage falls below or exceeds the programmable threshold, the IC triggers the reset function by asserting the RESET_N pin. The delay time for reset assertion can be adjusted using external components. During normal operation, the IC consumes minimal quiescent current, ensuring efficient power usage.

Application Field Plans

The TPS3850G18QDRCRQ1 finds applications in various electronic systems where voltage monitoring and reset generation are critical for reliable operation. Some potential application fields include:

1. Automotive Electronics: The IC can be used in automotive control units, ensuring proper system functioning even during voltage fluctuations or power disruptions.

2. Industrial Automation: It can be employed in industrial automation systems to monitor voltage levels and provide timely resets, preventing damage to equipment and ensuring uninterrupted operation.

3. Consumer Electronics: The TPS3850G18QDRCRQ1 is suitable for use in consumer electronics such as smartphones, tablets, and gaming consoles, where stable voltage supply is essential for optimal performance.

4. Medical Devices: Medical equipment often requires precise voltage monitoring and reliable reset functionality. This IC can be utilized in devices like patient monitors, infusion pumps, and diagnostic instruments.

Alternative Models

1. TPS3839K33DBVR: This IC offers similar voltage monitoring and reset generation features but operates at a fixed threshold voltage of 3.3V.

2. MAX823LEUK+T: A voltage supervisor IC with adjustable delay time and a wide operating voltage