TPS3813J25DBVR

Overview

Category: Integrated Circuits (ICs)

Use: Voltage Supervisors

Characteristics: - Low Power Supervisor with Programmable Delay - Precision Voltage Monitor - Manual Reset Input - Watchdog Timer - Power-On Reset Generator with Fixed Delay Time - Active-Low Push-Pull RESET Output - Supply Voltage Range: 1.6V to 6.5V - Operating Temperature Range: -40°C to +125°C - Small Package Size: SOT-23 (DBV)

Package: SOT-23 (DBV)

Essence: The TPS3813J25DBVR is a low-power voltage supervisor IC designed to monitor the power supply voltage of electronic systems and provide reset signals during power-up, power-down, and brownout conditions.

Packaging/Quantity: The TPS3813J25DBVR is available in tape and reel packaging, with 3000 units per reel.

Specifications

The TPS3813J25DBVR has the following specifications:

• Threshold Voltage: 2.5V
• Accuracy: ±1%
• Reset Timeout Period: 200ms (typical)
• Supply Current: 7µA (typical)
• Watchdog Timeout Period: 1.6s (typical)
• Manual Reset Input Threshold Voltage: 0.4V (typical)
• Power-On Reset Delay Time: 20ms (typical)

Pin Configuration

The TPS3813J25DBVR has the following pin configuration:

```

---

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

• VDD: Power Supply Input
• GND: Ground
• MR: Manual Reset Input
• RESET: Active-Low Push-Pull Reset Output

Functional Features

The TPS3813J25DBVR offers the following functional features:

1. Voltage Monitoring: Monitors the power supply voltage and asserts a reset signal when it falls below the threshold voltage.
2. Programmable Delay: Allows users to set the delay time for the reset signal after power-up.
3. Precision Voltage Monitor: Provides accurate voltage monitoring with a low threshold voltage of 2.5V.
4. Manual Reset Input: Allows manual assertion of the reset signal.
5. Watchdog Timer: Resets the system if a periodic input is not received within the specified timeout period.
6. Power-On Reset Generator: Generates a fixed delay time for the reset signal during power-up.
7. Active-Low Push-Pull RESET Output: Provides an active-low reset signal that can be directly connected to other ICs.

Advantages and Disadvantages

Advantages: - Low power consumption - Wide operating temperature range - Small package size - Accurate voltage monitoring - Programmable delay for reset signal

Disadvantages: - Limited threshold voltage options - No adjustable reset timeout period

Working Principles

The TPS3813J25DBVR operates by continuously monitoring the power supply voltage. When the voltage falls below the threshold voltage (2.5V), the IC asserts a reset signal. The reset signal remains active until the voltage rises above the threshold voltage and the programmable delay time elapses.

The IC also includes a watchdog timer that resets the system if a periodic input is not received within the specified timeout period. This feature ensures the system's integrity and prevents it from getting stuck in an undesired state.

During power-up, the power-on reset generator provides a fixed delay time for the reset signal to stabilize the system before it starts functioning.

Detailed Application Field Plans

The TPS3813J25DBVR is commonly used in various applications, including:

1. Microcontrollers: Ensures proper system initialization and prevents erratic behavior during power-up and brownout conditions.
2. Industrial Control Systems: Monitors the power supply voltage to prevent damage to sensitive components and ensure reliable operation.
3. Automotive Electronics: Provides reset signals to microcontrollers and other critical components to maintain system integrity and prevent malfunctions.
4. Battery-Powered Devices: Monitors battery voltage to prevent over-discharge and protect the device from damage.

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the TPS3813J25DBVR are:

1. TPS3808G01DBVR
2. TLV803SDBZR
3. MAX809SEUR-T
4. ADM6315-26D2ARTZ-RL7

These alternative models can be considered based on specific application requirements and availability.