TPS2828DBVR

Overview

Category: Integrated Circuit (IC)

Use: Voltage Supervisor and Reset Generator

Characteristics: - Monitors the voltage level of a power supply - Generates a reset signal when the voltage falls below a specified threshold - Ensures proper system initialization and operation - Suitable for use in various electronic devices

Package: SOT-23-5

Essence: The TPS2828DBVR is an integrated circuit that provides voltage supervision and reset generation capabilities. It is designed to monitor the voltage level of a power supply and generate a reset signal when the voltage falls below a specified threshold. This ensures proper system initialization and operation, preventing potential issues caused by insufficient power supply voltage.

Packaging/Quantity: The TPS2828DBVR is available in a SOT-23-5 package, which is a small surface-mount package with five pins. It is typically sold in reels or tubes containing multiple units.

Specifications

• Supply Voltage Range: 1.6V to 6.5V
• Threshold Voltage Options: 2.32V, 2.93V, 3.08V, 4.38V, 4.63V, 4.88V, 5.50V
• Accuracy: ±1%
• Quiescent Current: 7µA (typical)
• Power-On Reset Delay Time: 200ms (typical)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The TPS2828DBVR has the following pin configuration:

```

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

• VDD: Power supply voltage input
• GND: Ground reference
• MR: Manual reset input (active-low)
• RESET: Reset output signal
• VOUT: Voltage monitor output

Functional Features

1. Voltage Monitoring: The TPS2828DBVR continuously monitors the power supply voltage and compares it to the specified threshold voltage.
2. Reset Generation: When the monitored voltage falls below the threshold, the TPS2828DBVR generates a reset signal to initiate system reset or recovery.
3. Manual Reset Input: The MR pin allows for manual reset control by asserting a low signal to trigger a reset even if the voltage is above the threshold.
4. Precision and Accuracy: The IC provides accurate voltage monitoring with a ±1% threshold accuracy.
5. Low Quiescent Current: The TPS2828DBVR has a low quiescent current of only 7µA, minimizing power consumption.
6. Fast Power-On Reset: The device ensures a stable reset signal within 200ms after power-on, allowing for quick system initialization.

Advantages and Disadvantages

Advantages: - Reliable voltage supervision and reset generation - Wide supply voltage range - Multiple threshold voltage options - Low quiescent current for power efficiency - Fast power-on reset time

Disadvantages: - Limited package options - Requires external components for proper operation

Working Principles

The TPS2828DBVR operates by comparing the power supply voltage with the selected threshold voltage. When the voltage drops below the threshold, the internal circuitry triggers the reset output, signaling the need for system reset or recovery. The manual reset input allows for additional control over the reset function. The IC's low quiescent current ensures minimal power consumption during normal operation.

Application Field Plans

The TPS2828DBVR can be used in various electronic devices that require reliable voltage monitoring and reset generation. Some potential application fields include: - Microcontrollers and microprocessors - Embedded systems - Industrial control systems - Power management circuits - Battery-powered devices

Alternative Models

1. TPS3820DBVR: Similar voltage supervisor and reset generator IC with different package (SOT-23-5) and threshold voltage options.
2. MAX809SEUR-T: Voltage monitor and reset generator IC with a different package (SOT-23-3) and adjustable threshold voltage.
3. ADM708TARZ: Supervisory circuit with manual reset input, available in a SOT-23-5 package.

These alternative models offer similar functionality and can be considered as substitutes for the TPS2828DBVR depending on specific requirements.

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