TPS389018QDSERQ1

Product Overview

Category

The TPS389018QDSERQ1 belongs to the category of integrated circuits (ICs).

Use

This IC is primarily used for voltage monitoring and reset functions in various electronic systems.

Characteristics

• Voltage monitoring range: 0.8V to 5.5V
• Adjustable threshold voltage
• Low quiescent current consumption
• Wide operating temperature range: -40°C to +125°C
• Small package size for space-constrained applications

Package

The TPS389018QDSERQ1 is available in a small SOT-23 package, which offers compactness and ease of integration into electronic designs.

Essence

The essence of the TPS389018QDSERQ1 lies in its ability to monitor voltage levels and provide a reset signal when the voltage falls below a certain threshold.

Packaging/Quantity

This IC is typically sold in reels or tubes containing a specific quantity, such as 3000 units per reel.

Specifications

• Supply voltage range: 0.8V to 5.5V
• Threshold voltage accuracy: ±1.5%
• Quiescent current: 1.6µA (typical)
• Reset timeout period: 200ms (typical)
• Operating temperature range: -40°C to +125°C

Detailed Pin Configuration

The TPS389018QDSERQ1 features a standard SOT-23 package with three pins:

1. VDD: Power supply input pin
2. GND: Ground reference pin
3. RESET: Output pin for reset signal

Functional Features

1. Voltage Monitoring: The TPS389018QDSERQ1 continuously monitors the voltage level at the VDD pin and compares it to the internally set threshold voltage.
2. Reset Signal Generation: When the voltage falls below the threshold, the IC generates a reset signal on the RESET pin, indicating a power-on reset or voltage drop event.
3. Adjustable Threshold: The threshold voltage can be adjusted externally using an external resistor divider network, allowing flexibility in setting the desired voltage level for triggering the reset signal.
4. Low Quiescent Current: The IC consumes very low quiescent current, making it suitable for battery-powered applications where power efficiency is crucial.
5. Wide Operating Temperature Range: With a wide operating temperature range of -40°C to +125°C, the TPS389018QDSERQ1 can withstand harsh environmental conditions.

Advantages and Disadvantages

Advantages

• Accurate voltage monitoring with adjustable threshold
• Low power consumption
• Compact package size for space-constrained designs
• Wide operating temperature range

Disadvantages

• Limited to voltage monitoring and reset functions only
• Requires an external resistor divider network for threshold adjustment

Working Principles

The TPS389018QDSERQ1 operates by continuously comparing the voltage at the VDD pin with the internally set threshold voltage. If the voltage falls below the threshold, the IC generates a reset signal on the RESET pin, indicating a power-on reset or voltage drop event. The threshold voltage can be adjusted externally using an external resistor divider network.

Detailed Application Field Plans

The TPS389018QDSERQ1 finds applications in various electronic systems that require voltage monitoring and reset functionality. Some potential application fields include:

1. Microcontrollers: Ensuring proper initialization and reliable operation by monitoring the supply voltage and generating a reset signal when necessary.
2. Battery-Powered Devices: Protecting sensitive circuitry from undervoltage conditions and initiating a system reset to prevent data corruption or improper operation.
3. Automotive Electronics: Monitoring critical voltage levels in automotive systems to ensure safe and reliable operation, especially during start-up or voltage fluctuations.
4. Industrial Control Systems: Providing voltage monitoring and reset capabilities in industrial control systems to maintain system integrity and prevent malfunctioning due to power supply issues.

Detailed and Complete Alternative Models

1. TPS389018QDSE: Similar to TPS389018QDSERQ1 but without the automotive qualification.
2. TPS389018QDSET: Automotive-qualified version with a different package (SOT-23-5).

These alternative models offer similar voltage monitoring and reset functionality, but may differ in specific features or package options.

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