TPS3837K33DBVRG4

Overview

Category: Integrated Circuits (ICs)

Use: Voltage Supervisor

Characteristics: - Low Power Consumption - Wide Operating Voltage Range - Adjustable Reset Threshold - Manual Reset Input - Power-On Reset Delay Time: 200 ms (typical) - Open Drain Output - Small Package Size

Package: SOT-23 (DBV)

Essence: The TPS3837K33DBVRG4 is a voltage supervisor IC that monitors the power supply voltage of a system and provides a reset signal to the microcontroller or other digital devices when the voltage drops below a certain threshold.

Packaging/Quantity: The TPS3837K33DBVRG4 is available in tape and reel packaging, with 3000 units per reel.

Specifications

• Supply Voltage Range: 1.8 V to 10 V
• Reset Threshold Voltage: Adjustable from 2.93 V to 3.08 V
• Quiescent Current: 1.5 µA (typical)
• Operating Temperature Range: -40°C to +125°C
• Output Type: Open Drain
• Output Voltage: VCC - 0.4 V (maximum)
• Power-On Reset Delay Time: 200 ms (typical)

Pin Configuration

The TPS3837K33DBVRG4 has a SOT-23 package with three pins:

1. GND: Ground connection.
2. RESET: Output pin for the reset signal.
3. VCC: Power supply input.

Functional Features

1. Voltage Monitoring: The TPS3837K33DBVRG4 continuously monitors the supply voltage and generates a reset signal when the voltage drops below the set threshold.
2. Adjustable Reset Threshold: The reset threshold voltage can be adjusted within a specific range to suit different system requirements.
3. Manual Reset Input: The IC provides a manual reset input pin that allows an external signal to force a reset, overriding the voltage monitoring function.
4. Power-On Reset Delay: The IC includes a power-on reset delay circuit that ensures a stable power supply before releasing the reset signal.
5. Open Drain Output: The reset output is an open drain configuration, allowing flexibility in connecting to different microcontrollers or digital devices.

Advantages and Disadvantages

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

Disadvantages: - Power-on reset delay time may not be suitable for all applications - Open drain output requires additional pull-up resistor

Working Principles

The TPS3837K33DBVRG4 operates by comparing the supply voltage with the set threshold voltage. When the supply voltage drops below the threshold, the internal comparator triggers and generates a reset signal. This signal remains active until the supply voltage rises above the threshold and the power-on reset delay time elapses.

The adjustable reset threshold allows the IC to be configured for different voltage levels, providing flexibility in various applications. The manual reset input allows an external signal to override the voltage monitoring function and force a reset when required.

Detailed Application Field Plans

The TPS3837K33DBVRG4 is commonly used in various electronic systems where reliable voltage monitoring and reset functionality are essential. Some application fields include:

1. Microcontroller Systems: The IC ensures proper operation of microcontrollers by resetting them when the supply voltage drops below a certain level, preventing data corruption or erratic behavior.
2. Embedded Systems: Embedded systems often require a stable power supply for reliable operation. The TPS3837K33DBVRG4 provides a reset signal to the system when the voltage falls outside the acceptable range.
3. Battery-Powered Devices: Portable devices powered by batteries can benefit from the TPS3837K33DBVRG4's low power consumption and wide operating voltage range, ensuring efficient use of battery power and preventing unexpected shutdowns.
4. Industrial Control Systems: In industrial control systems, where stable operation is critical, the IC helps maintain system integrity by monitoring the power supply voltage and initiating a reset if necessary.

Detailed and Complete Alternative Models

1. TPS3839K33DBVRG4: Similar to TPS3837K33DBVRG4 but with a fixed reset threshold voltage of 3.08 V.
2. TPS3808G01DBVRG4: Voltage supervisor IC with adjustable reset threshold and push-pull output configuration.
3. TPS3890DBVRG4: Supervisor IC with adjustable reset threshold and watchdog timer functionality.

These alternative models offer similar voltage monitoring and reset features, but may have different specifications or additional functionalities that cater to specific application requirements.

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