TPS3128E12DBVT

Overview

Category: Integrated Circuit (IC)

Use: Voltage Supervisor

Characteristics: - Monitors voltage levels in electronic systems - Generates a reset signal when the voltage falls below a specified threshold - Prevents system malfunction due to low voltage conditions

Package: SOT-23 (Small Outline Transistor)

Essence: The TPS3128E12DBVT is a voltage supervisor IC that ensures proper functioning of electronic systems by monitoring voltage levels and generating a reset signal when necessary.

Packaging/Quantity: The TPS3128E12DBVT is available in a SOT-23 package. It is typically sold in reels containing 3000 units.

Specifications

• Supply Voltage Range: 1.2V to 6V
• Reset Threshold Voltage: 1.2V
• Reset Timeout Period: Adjustable (typically 200ms)
• Quiescent Current: 3µA (typical)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The TPS3128E12DBVT has the following pin configuration:

____ VDD| |GND RST| |N/C GND| |MR ----

• VDD: Power supply input
• GND: Ground reference
• RST: Reset output
• N/C: No connection
• MR: Manual reset input

Functional Features

1. Voltage Monitoring: The TPS3128E12DBVT continuously monitors the voltage level at the VDD pin.
2. Reset Generation: When the voltage falls below the reset threshold, the IC generates a reset signal on the RST pin.
3. Adjustable Timeout Period: The reset signal remains active for a user-adjustable timeout period, typically 200ms.
4. Manual Reset: The MR pin allows for a manual reset input, overriding the voltage monitoring function.

Advantages and Disadvantages

Advantages: - Compact SOT-23 package enables space-saving designs - Wide supply voltage range allows compatibility with various systems - Low quiescent current minimizes power consumption - Adjustable reset timeout period provides flexibility in system design

Disadvantages: - Lack of built-in hysteresis may result in potential oscillations near the reset threshold - Limited number of pins restricts additional functionalities without external circuitry

Working Principles

The TPS3128E12DBVT operates by comparing the voltage at the VDD pin with the reset threshold voltage. When the voltage falls below the threshold, the IC triggers the reset signal on the RST pin. The reset signal remains active for the user-adjustable timeout period, allowing the system to stabilize before resuming normal operation.

Application Field Plans

The TPS3128E12DBVT is commonly used in various electronic systems where reliable voltage monitoring and reset generation are crucial. Some application fields include:

1. Microcontrollers: Ensures proper functioning of microcontroller-based systems by preventing malfunctions caused by low voltage conditions.
2. Embedded Systems: Protects embedded systems from voltage fluctuations, ensuring stable operation and preventing data corruption.
3. Battery-Powered Devices: Monitors battery voltage levels in portable devices, preventing unexpected shutdowns and preserving data integrity.
4. Industrial Control Systems: Provides voltage supervision in industrial control systems, enhancing overall system reliability.

Alternative Models

1. TPS3125E18DBVR: Similar voltage supervisor IC with a higher reset threshold voltage (1.8V).
2. TPS3129E15DBVT: Voltage supervisor IC with a lower reset threshold voltage (1.5V) for more sensitive applications.
3. TPS3839K33DBVR: Supervisor IC with a fixed reset threshold voltage of 3.3V, suitable for specific voltage requirements.

These alternative models offer different specifications and features to cater to diverse application needs.

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