TPS61251DSGR

Product Overview

Category

The TPS61251DSGR belongs to the category of integrated circuits (ICs) and specifically falls under the voltage regulators - switching regulators family.

Use

This product is primarily used for boosting or stepping up voltage levels efficiently. It is commonly employed in various electronic devices where a higher voltage level is required, such as battery-powered systems, portable devices, and low-power applications.

Characteristics

• High efficiency: The TPS61251DSGR offers high conversion efficiency, ensuring minimal power loss during voltage conversion.
• Wide input voltage range: It can accept input voltages ranging from 0.3V to 5.5V, making it suitable for a wide range of applications.
• Adjustable output voltage: The output voltage can be adjusted within a specified range, providing flexibility in meeting different system requirements.
• Low quiescent current: The device exhibits low standby current consumption, contributing to overall power savings.
• Thermal shutdown protection: It incorporates thermal shutdown circuitry to prevent overheating and ensure safe operation.

Package

The TPS61251DSGR is available in a small 10-pin VSON package, which provides compactness and ease of integration into various circuit designs.

Essence

The essence of the TPS61251DSGR lies in its ability to efficiently boost input voltages while maintaining high conversion efficiency and low power consumption.

Packaging/Quantity

This product is typically supplied in tape and reel packaging, with a quantity of 3000 units per reel.

Specifications

• Input Voltage Range: 0.3V to 5.5V
• Output Voltage Range: 1.8V to 5.5V
• Maximum Output Current: 1A
• Switching Frequency: 1.2MHz
• Quiescent Current: 17µA
• Operating Temperature Range: -40°C to 85°C

Detailed Pin Configuration

The TPS61251DSGR features the following pin configuration:

1. EN (Enable): Controls the device's operation by enabling or disabling it.
2. VIN (Input Voltage): Connects to the input voltage source.
3. PGND (Power Ground): Ground reference for the power stage.
4. SW (Switch Node): Connects to the inductor and serves as the switching node.
5. LX (Inductor Connection): Connects to the inductor for energy storage and transfer.
6. FB (Feedback): Provides feedback for regulating the output voltage.
7. VOUT (Output Voltage): Connects to the load or system requiring the boosted voltage.
8. AGND (Analog Ground): Ground reference for the control circuitry.
9. SS/TR (Soft Start/Tracking): Sets the soft start time or enables tracking mode.
10. BST (Bootstrap): Connects to an external capacitor for bootstrap operation.

Functional Features

• High efficiency conversion: The TPS61251DSGR achieves high conversion efficiency, minimizing power loss during voltage boosting.
• Adjustable output voltage: The output voltage can be adjusted within a specified range, allowing customization based on application requirements.
• Soft start and tracking: The soft start feature ensures a controlled startup, while the tracking mode enables synchronization with other power supplies.
• Overcurrent protection: The device incorporates overcurrent protection to safeguard against excessive current flow.
• Thermal shutdown: It includes thermal shutdown circuitry to prevent overheating and protect the device from damage.

Advantages and Disadvantages

Advantages

• High conversion efficiency leads to reduced power loss.
• Wide input voltage range allows compatibility with various power sources.
• Compact package facilitates integration into space-constrained designs.
• Adjustable output voltage provides flexibility for different applications.
• Low quiescent current contributes to overall power savings.

Disadvantages

• Limited maximum output current of 1A may not be suitable for high-power applications.
• Operating temperature range of -40°C to 85°C may restrict usage in extreme environments.

Working Principles

The TPS61251DSGR operates as a step-up (boost) voltage regulator. It utilizes an inductor and a switching transistor to convert the input voltage to a higher output voltage. The control circuitry adjusts the duty cycle of the switching transistor to regulate the output voltage within the desired range. This switching action, combined with energy storage in the inductor, allows efficient voltage boosting.

Detailed Application Field Plans

The TPS61251DSGR finds application in various fields, including but not limited to: - Battery-powered devices: It can be used to boost battery voltage to power components requiring higher voltages. - Portable electronics: Enables efficient voltage conversion in portable devices such as smartphones, tablets, and wearables. - Low-power applications: Suitable for low-power systems where efficient voltage boosting is required, such as IoT devices and sensors.

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality