TPS3850H18QDRCRQ1

Overview

Category: Integrated Circuits (ICs)

Use: Voltage Supervisors

Characteristics: - Wide Supply Voltage Range: 1.6V to 6.5V - Adjustable Threshold Voltage - Low Quiescent Current: 2.5µA (typical) - Power-On Reset Delay Time: 200ms (typical) - Watchdog Timer with Programmable Timeout Period - Open-Drain RESET Output - Small Package Size: VSON-10

Package: VSON-10

Essence: The TPS3850H18QDRCRQ1 is a voltage supervisor IC designed for monitoring the power supply voltage in various applications. It provides a reset signal to the system when the voltage falls below a certain threshold, ensuring proper operation and preventing data corruption.

Packaging/Quantity: The TPS3850H18QDRCRQ1 is available in a VSON-10 package. It is typically sold in reels of 2500 units.

Specifications

• Supply Voltage Range: 1.6V to 6.5V
• Threshold Voltage Range: 1.8V to 4.5V (adjustable)
• Quiescent Current: 2.5µA (typical)
• Power-On Reset Delay Time: 200ms (typical)
• Watchdog Timer Timeout Period: Programmable
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The TPS3850H18QDRCRQ1 has the following pin configuration:

1. GND (Ground)
2. MR (Manual Reset)
3. VDD (Supply Voltage)
4. VIT (Internal Threshold Voltage)
5. CT (Watchdog Timer Timeout Programming)
6. WDI (Watchdog Timer Input)
7. RESET (Reset Output)
8. NC (No Connect)
9. NC (No Connect)
10. NC (No Connect)

Functional Features

• Voltage Monitoring: The TPS3850H18QDRCRQ1 continuously monitors the supply voltage and generates a reset signal when it falls below the programmed threshold voltage.
• Adjustable Threshold Voltage: The threshold voltage can be adjusted within a specified range to suit different system requirements.
• Power-On Reset Delay: The IC provides a power-on reset delay of 200ms, ensuring stable operation during power-up.
• Watchdog Timer: It includes a watchdog timer with a programmable timeout period, allowing the system to detect and recover from software or hardware failures.
• Open-Drain RESET Output: The reset output is an open-drain configuration, providing flexibility in interfacing with other devices.

Advantages and Disadvantages

Advantages: - Wide supply voltage range allows compatibility with various systems. - Adjustable threshold voltage enables customization for specific applications. - Low quiescent current minimizes power consumption. - Power-on reset delay ensures reliable startup. - Watchdog timer enhances system reliability. - Small package size saves board space.

Disadvantages: - Limited number of available pins may restrict functionality in complex designs. - Lack of built-in hysteresis may result in potential noise-related issues.

Working Principles

The TPS3850H18QDRCRQ1 operates by comparing the supply voltage with the internally set threshold voltage. When the supply voltage drops below the threshold, the reset output is activated, signaling a low-voltage condition. The power-on reset delay ensures that the reset signal remains active for a specified time after power-up, allowing the system to stabilize before normal operation resumes. The watchdog timer monitors the system's activity and generates a reset signal if it detects a timeout or error condition.

Detailed Application Field Plans

The TPS3850H18QDRCRQ1 is widely used in various applications, including:

1. Automotive Electronics: It provides voltage monitoring and reset functionality in automotive control units, ensuring reliable operation and preventing system failures.
2. Industrial Automation: The IC is utilized in industrial automation systems to monitor power supply voltages and initiate appropriate actions in case of voltage deviations.
3. Consumer Electronics: It finds application in consumer electronic devices such as smart home systems, IoT devices, and portable electronics, ensuring proper functioning and protecting data integrity.
4. Telecommunications: The TPS3850H18QDRCRQ1 is employed in telecommunications equipment to monitor power supply voltages and trigger system resets when necessary, improving overall reliability.

Detailed and Complete Alternative Models

1. TPS3850H33QDRCRQ1: Similar to TPS3850H18QDRCRQ1 but with a higher threshold voltage range (2.5V to 6.5V).