TPS3305-25DG4

Product Overview

Category

The TPS3305-25DG4 belongs to the category of voltage supervisors.

Use

It is primarily used for monitoring and controlling the voltage levels in electronic systems.

Characteristics

• Voltage supervision range: 2.5V
• Low quiescent current: 10µA (typical)
• Wide operating temperature range: -40°C to +125°C
• Adjustable threshold voltage
• Power-on reset delay time: 200ms (typical)

Package

The TPS3305-25DG4 comes in a small SOT-23 package, which is suitable for space-constrained applications.

Essence

The essence of the TPS3305-25DG4 lies in its ability to provide reliable voltage monitoring and reset generation in various electronic systems.

Packaging/Quantity

This product is typically available in reels, with 3000 units per reel.

Specifications

• Supply voltage range: 1.8V to 6.5V
• Threshold voltage accuracy: ±1.5%
• Power supply glitch immunity: 50ns
• Watchdog timer: 1.6s (typical)
• Open-drain output

Detailed Pin Configuration

The TPS3305-25DG4 has the following pin configuration:

1. GND (Ground)
2. VDD (Supply Voltage)
3. MR (Manual Reset)
4. RESET (Reset Output)

Functional Features

1. Voltage Monitoring: The TPS3305-25DG4 continuously monitors the input voltage and provides a reset signal when it falls below the threshold voltage.
2. Manual Reset: The MR pin allows for manual reset control, enabling system initialization or recovery.
3. Power-On Reset Delay: The device ensures a stable power-on reset delay of 200ms, preventing premature system operation.
4. Glitch Immunity: The TPS3305-25DG4 is designed to withstand power supply glitches as short as 50ns, ensuring reliable operation in noisy environments.
5. Watchdog Timer: It includes a watchdog timer that generates a reset signal if the system fails to toggle within a specified time period.

Advantages and Disadvantages

Advantages

• Low quiescent current consumption helps conserve power in battery-operated devices.
• Wide operating temperature range allows for use in extreme environmental conditions.
• Adjustable threshold voltage provides flexibility in voltage monitoring applications.
• Small package size enables integration into space-constrained designs.

Disadvantages

• Limited voltage supervision range of 2.5V may not be suitable for all applications requiring higher or lower thresholds.
• Lack of built-in hysteresis may result in potential oscillations near the threshold voltage.

Working Principles

The TPS3305-25DG4 operates by comparing the input voltage with the internally set threshold voltage. When the input voltage falls below the threshold, the reset output is activated, indicating a power-on reset condition. The device continuously monitors the voltage and keeps the reset output active until the input voltage rises above the threshold.

Detailed Application Field Plans

The TPS3305-25DG4 finds application in various electronic systems, including but not limited to: - Microcontrollers and microprocessors - Industrial control systems - Automotive electronics - Power management units - Battery-powered devices

Detailed and Complete Alternative Models

1. TPS3305-33DG4: Similar to TPS3305-25DG4, but with a threshold voltage of 3.3V.
2. TPS3305-18DG4: Similar to TPS3305-25DG4, but with a threshold voltage of 1.8V.
3. TPS3305-50DG4: Similar to TPS3305-25DG4, but with a threshold voltage of 5.0V.

These alternative models provide different threshold voltage options to suit specific voltage monitoring requirements.

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