TPS3800G27DCKRG4

Overview

Category: Integrated Circuits (ICs)

Use: Voltage Supervisors

Characteristics: - Monitors voltage levels and provides a reset signal when the voltage falls below a specified threshold - Low-power consumption - Wide operating voltage range - Adjustable reset threshold - Small package size

Package: SC-70 (SOT-323), 5-Pin

Essence: The TPS3800G27DCKRG4 is a voltage supervisor IC that ensures proper functioning of electronic systems by monitoring the voltage levels and generating a reset signal when the voltage drops below a predetermined threshold.

Packaging/Quantity: The TPS3800G27DCKRG4 is available in tape and reel packaging, with 3000 units per reel.

Specifications

• Supply Voltage Range: 1.6V to 6.5V
• Reset Threshold Voltage: Adjustable from 1.2V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Quiescent Current: 3 µA (typical)
• Power-On Reset Delay Time: 20 ms (typical)
• Watchdog Timer Timeout Period: 1.6 s (typical)

Pin Configuration

The TPS3800G27DCKRG4 has the following pin configuration:

```

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

• VDD: Power supply input
• GND: Ground reference
• MR: Manual reset input (active low)
• RESET: Reset output
• NRESET: Active-low open-drain reset output

Functional Features

1. Voltage Monitoring: The TPS3800G27DCKRG4 continuously monitors the supply voltage and compares it to the user-adjustable threshold. If the voltage drops below the threshold, a reset signal is generated.
2. Manual Reset: The MR pin allows for manual resetting of the device by pulling it low.
3. Power-On Reset Delay: The IC ensures a stable power-on reset delay of 20 ms before asserting the reset signal.
4. Watchdog Timer: The TPS3800G27DCKRG4 includes a watchdog timer that generates a reset signal if the system fails to toggle a specific input within the timeout period.

Advantages and Disadvantages

Advantages: - Low-power consumption - Wide operating voltage range - Adjustable reset threshold - Small package size

Disadvantages: - Lack of built-in hysteresis for noise immunity - Limited number of pins for additional functionality

Working Principles

The TPS3800G27DCKRG4 operates by comparing the supply voltage with the user-adjustable threshold voltage. When the supply voltage falls below the threshold, the reset output is asserted, indicating a power failure or an abnormal condition. The device also incorporates a watchdog timer that monitors the system's activity and generates a reset signal if the system fails to toggle a specific input within the timeout period.

Application Field Plans

The TPS3800G27DCKRG4 finds applications in various electronic systems where reliable voltage monitoring and reset generation are critical. Some potential application fields include:

1. Microcontrollers and Microprocessors: Ensuring proper system initialization and preventing data corruption during power fluctuations.
2. Industrial Control Systems: Providing fault detection and system reset capabilities in industrial automation equipment.
3. Automotive Electronics: Monitoring the vehicle's electrical system and generating resets in case of voltage drops or faults.
4. Battery-Powered Devices: Protecting battery-powered devices from over-discharge by initiating a shutdown or reset when the voltage falls below a safe threshold.

Alternative Models

1. TPS3800G01: Similar voltage supervisor IC with fixed reset threshold and different package options.
2. TPS3808G01: Voltage supervisor IC with adjustable reset threshold and additional features like watchdog timer and power-on reset delay.
3. MAX823: Voltage monitor IC with adjustable reset threshold and integrated hysteresis for noise immunity.

These alternative models offer similar functionality and can be considered as substitutes for the TPS3800G27DCKRG4 in specific applications.

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