TPS3824-25QDBVRQ1

Product Overview

Category

The TPS3824-25QDBVRQ1 belongs to the category of voltage supervisors.

Use

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

Characteristics

• Voltage supervision range: 2.5V
• Low quiescent current: 10µA (typical)
• Precision voltage threshold: ±2%
• Power-on reset delay time: 200ms (typical)
• Watchdog timer: 1.6s (typical)
• Manual reset input
• Small package size: SOT23-5
• RoHS compliant

Package and Quantity

The TPS3824-25QDBVRQ1 is available in a small SOT23-5 package. It is typically sold in reels of 2500 units.

Specifications

• Supply voltage range: 1.8V to 6.5V
• Operating temperature range: -40°C to +125°C
• Output type: Active low, push-pull
• Reset threshold accuracy: ±2%
• Watchdog timeout period: 1.6s (typical)
• Manual reset input voltage range: 0.7V to VDD
• Quiescent current: 10µA (typical)

Pin Configuration

The TPS3824-25QDBVRQ1 has the following pin configuration:

```

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| | --| RESET | --| GND | --| MR | --| VDD | --| VOUT | |___________| ```

Functional Features

1. Voltage Monitoring: The TPS3824-25QDBVRQ1 continuously monitors the supply voltage and asserts a reset signal when it falls below the specified threshold.
2. Power-On Reset: It provides a power-on reset delay of 200ms to ensure stable operation during power-up.
3. Watchdog Timer: The integrated watchdog timer ensures system integrity by resetting the device if a software or hardware failure occurs.
4. Manual Reset Input: The manual reset input allows for an external reset signal to be applied, overriding the internal monitoring circuit.

Advantages and Disadvantages

Advantages

• Low quiescent current enables power-efficient operation.
• Precision voltage threshold ensures accurate monitoring.
• Small package size allows for space-constrained applications.
• RoHS compliance ensures environmental friendliness.

Disadvantages

• Limited voltage supervision range (2.5V).
• Watchdog timeout period may not be suitable for all applications.

Working Principles

The TPS3824-25QDBVRQ1 operates by comparing the supply voltage with a precision voltage threshold. If the voltage drops below this threshold, the device asserts a reset signal, indicating a power failure or abnormal condition. The power-on reset delay ensures that the reset signal is not triggered during power-up transients. The integrated watchdog timer monitors the system's activity and resets the device if no activity is detected within the specified timeout period.

Application Field Plans

The TPS3824-25QDBVRQ1 finds applications in various fields, including: 1. Automotive electronics: Used for voltage monitoring in automotive control systems. 2. Industrial automation: Ensures reliable operation of industrial equipment by monitoring voltage levels. 3. Consumer electronics: Provides voltage supervision in battery-powered devices to prevent unexpected shutdowns. 4. Medical devices: Monitors power supply integrity in medical equipment to ensure patient safety.

Alternative Models

1. TPS3820-33QDBVRQ1: Voltage supervisor with a threshold of 3.3V.
2. TPS3825-33QDBVRQ1: Voltage supervisor with a threshold of 3.3V and a longer watchdog timeout period.
3. TPS3839K33DBVRQ1: Voltage supervisor with adjustable threshold and additional features like manual reset input.

These alternative models offer different voltage thresholds and additional features to cater to specific application requirements.

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