TPS3838E18DBVT - English Editing Encyclopedia Entry

Product Overview

Category

The TPS3838E18DBVT belongs to the category of voltage supervisors.

Use

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

Characteristics

• Voltage Range: 1.8V
• Low Quiescent Current: 1.5µA (typical)
• Precision Voltage Threshold: ±0.5%
• Power-On Reset Delay: 200ms (typical)
• Open Drain Output
• Small Package Size: SOT-23-5

Package and Quantity

The TPS3838E18DBVT is available in a small SOT-23-5 package. It is typically sold in reels or tubes, with a quantity of 3000 units per reel.

Specifications

• Supply Voltage Range: 1.6V to 6.5V
• Operating Temperature Range: -40°C to +125°C
• Power-On Reset Threshold: 1.8V
• Reset Timeout Period: 200ms (typical)
• Quiescent Current: 1.5µA (typical)

Pin Configuration

The TPS3838E18DBVT has the following pin configuration:

```

---

| | --|VDD |-- --|GND |-- --|MR |-- --|DO |-- |____| ```

• VDD: Supply Voltage
• GND: Ground
• MR: Manual Reset Input
• DO: Open Drain Reset Output

Functional Features

• Voltage Monitoring: The TPS3838E18DBVT continuously monitors the supply voltage and provides a reset signal when it falls below the specified threshold.
• Power-On Reset: Upon power-up, the device ensures a stable reset signal for a defined period, allowing the system to initialize properly.
• Manual Reset: The MR pin allows for manual reset control, enabling the user to override the automatic reset functionality.

Advantages and Disadvantages

Advantages

• Low quiescent current consumption, making it suitable for battery-powered applications.
• Precision voltage threshold ensures accurate monitoring of voltage levels.
• Small package size enables space-efficient designs.
• Open drain output allows for easy integration with other components.

Disadvantages

• Limited supply voltage range (1.6V to 6.5V).
• Reset timeout period may not be adjustable, limiting flexibility in certain applications.

Working Principles

The TPS3838E18DBVT operates by comparing the supply voltage against a precise threshold. When the voltage falls below this threshold, the device triggers a reset signal. The power-on reset feature ensures a stable reset signal during system startup, while the manual reset input allows for user-controlled resets.

Application Field Plans

The TPS3838E18DBVT finds application in various electronic systems where voltage monitoring and reliable reset functionality are critical. Some potential fields of application include:

1. Microcontrollers and Microprocessors: Ensuring proper initialization and preventing data corruption during power-up.
2. Industrial Control Systems: Monitoring voltage levels in critical control circuits to prevent malfunctions or damage.
3. Automotive Electronics: Providing reliable reset signals for safety-critical systems such as airbag controllers and engine management units.
4. Battery-Powered Devices: Extending battery life by efficiently managing power-on and power-off sequences.

Alternative Models

For users seeking alternative options, the following models offer similar functionality:

1. TPS3839E18DBVR: Similar to TPS3838E18DBVT but available in a smaller SOT-23-3 package.
2. MAX823LEUK+: Voltage supervisor with adjustable reset timeout period and a wider supply voltage range.
3. ADM6315-26D2ARTZ-R7: Precision voltage monitor with adjustable reset threshold and manual reset input.

These alternative models provide flexibility in terms of package size, features, and specifications, allowing users to choose the most suitable option for their specific application requirements.

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