What is TPS5430DDAR and What Are Its Main Features

The TPS5430DDAR is a high-output-current PWM buck converter IC designed to deliver efficient power management in demanding environments.
Key features include:

• Wide input voltage range from 4.5V to 17V

• Adjustable output voltage from 0.8V to 5.5V

• High efficiency up to 95%

• Continuous output current up to 3A

• Integrated compensation and soft start functionality

• Thermal protection and power good indicator

• Compact SO-PowerPad-8 package for space-limited designs

These capabilities make the device an excellent choice for engineers and designers who require reliable, flexible, and compact power solutions across industrial, automotive, and consumer applications.

Key Takeaways

• The TPS5430DDAR is a compact and efficient buck converter that steps down voltage with up to 95% efficiency, saving energy and reducing heat.

• It supports a wide input voltage range from 5.5V to 36V and delivers up to 3A continuous current, making it suitable for many industrial, automotive, and consumer applications.

• Built-in protection features like overcurrent limiting, thermal shutdown, and soft-start help keep devices safe and reliable under different conditions.

• The device’s fixed 500kHz switching frequency and integrated components simplify circuit design and allow smaller external parts, saving space and cost.

• Its small SO-PowerPAD-8 package offers excellent heat dissipation and fits well in tight spaces, ideal for compact and demanding power systems.

TPS5430DDAR Overview

Device Summary

The TPS5430DDAR is a power management integrated circuit from Texas Instruments. It serves as a DC-DC buck converter, which means it takes a higher input voltage and steps it down to a lower, stable output voltage. The device features an integrated high-side N-channel MOSFET, which helps achieve high voltage regulation accuracy and fast response to changes in load. Engineers often choose this IC for its ability to deliver up to 3A of continuous output current while maintaining high efficiency. The TPS5430DDAR also includes built-in protection features, such as overcurrent limiting, overvoltage protection, thermal shutdown, and undervoltage lockout. These features ensure reliable operation in a wide range of electronic applications.

Note: The TPS5430DDAR combines efficiency, compact design, and robust protection, making it suitable for demanding power supply tasks.

Operation

The TPS5430DDAR operates as a step-down (buck) converter using several key components and control methods:

• The device uses an integrated high-side N-channel MOSFET switch and an inductor to convert a higher input voltage to a lower output voltage.

• It employs pulse-width modulation (PWM) control with a fixed switching frequency of 500kHz to regulate the output voltage.

• An internal error amplifier monitors the output voltage through the feedback pin (VSENSE) and adjusts the MOSFET's duty cycle to keep the voltage stable.

• Internal compensation and a bootstrap capacitor help drive the high-side MOSFET efficiently.

• The device includes a slow-start feature that limits inrush current during startup, which helps protect sensitive components.

• Protection features such as overcurrent limiting, overvoltage protection, thermal shutdown, and undervoltage lockout safeguard the circuit during abnormal conditions.

• Typical application circuits connect the input voltage, ground, inductor, output capacitor, and feedback resistors. The ENA pin allows users to enable or disable the device as needed.

• The integrated MOSFET and fixed switching frequency contribute to high efficiency, reaching up to 95%, and allow for a compact filter design.

Engineers value the TPS5430DDAR for its reliable voltage regulation, fast transient response, and comprehensive protection features. These qualities make it a strong choice for powering sensitive electronics in industrial, automotive, and consumer devices.

Features

Input Voltage Range

The TPS5430DDAR supports a wide input voltage range from 5.5V to 36V. This flexibility allows engineers to use the device with many power sources, including automotive and industrial supplies. The broad voltage range makes the converter suitable for systems that require stable operation under varying input conditions. Designers can implement the TPS5430DDAR in projects without major changes to the power supply design, which saves time and reduces complexity.

Output Current

The TPS5430DDAR delivers up to 3A of continuous output current under standard operating conditions. It can also handle peak currents up to 4A for short durations. This current capability meets the needs of many industrial and consumer applications, such as powering microcontrollers, sensors, and communication modules. The device maintains stable performance even when the load changes quickly.

Efficiency

• The integrated high-side N-channel MOSFET in the TPS5430DDAR reduces power loss and enables efficient switching.

• The device achieves energy efficiency up to 95%, which minimizes power waste and extends battery life in portable systems.

• The PowerPAD™ package improves heat dissipation, allowing the converter to operate reliably under heavy loads and high temperatures.

• High efficiency and effective thermal management make the TPS5430DDAR a strong choice for automotive, telecommunications, and industrial automation applications.

Protection

The TPS5430DDAR system is protected by overcurrent limiting, overvoltage protection, and thermal shutdown, ensuring reliable operation and safeguarding against electrical and thermal faults.

The TPS5430DDAR includes integrated protection features such as overcurrent protection, overvoltage protection, and thermal shutdown. These protections help prevent damage to the device and surrounding circuitry by limiting current during overloads, shutting down the device when excessive voltage is detected, and turning off the device to avoid overheating.

The converter also features a soft-start function. This feature allows the output voltage to rise gradually during startup, which limits inrush current and prevents sudden voltage surges. Sensitive loads, such as automotive infotainment systems, benefit from this controlled startup because it protects electronic components and improves system reliability.

TPS5430DDAR Specifications

Electrical Specs

The TPS5430DDAR offers robust electrical performance for a wide range of power management applications. Its specifications support reliable operation in demanding environments. The following table summarizes the key electrical characteristics:

The device can deliver up to 3A at 5V under maximum load conditions. Its fixed 500 kHz switching frequency allows designers to use smaller inductors and capacitors, which saves board space. The low quiescent current helps reduce overall power consumption, making the TPS5430DDAR suitable for energy-sensitive designs.

Package

Texas Instruments packages the TPS5430DDAR in a compact SO-PowerPad-8 form factor. This package supports efficient assembly and excellent thermal management. Key package features include:

• The PowerPAD™ design enhances heat dissipation when soldered to the PCB, allowing the device to operate reliably from -40°C to 125°C.

• Built-in thermal shutdown protection prevents overheating, ensuring stable operation even under heavy loads.

• The compact package size fits well in space-constrained applications, such as automotive modules and industrial controllers.

Proper PCB layout is essential for optimal performance. Place input and output capacitors close to the IC to reduce noise and ensure stable operation. Connect feedback resistors near the output capacitor for accurate voltage sensing. Avoid large loops and unnecessary vias in critical current paths to minimize electromagnetic interference (EMI).

The SO-PowerPad-8 package, combined with careful PCB design, ensures the TPS5430DDAR maintains high efficiency and reliability in real-world applications.

TPS5430DDAR Applications

Industrial

The TPS5430DDAR serves many roles in industrial environments. Engineers use this device to power microcontrollers, FPGAs, and sensor hubs. It supports industrial automation systems, motor control units, and instrumentation. Telecommunications equipment and network infrastructure also rely on this converter for stable power delivery.

• Common uses in industry:

  • Power supply systems for automation

  • Motor controllers and instrumentation

  • Networking equipment and DC rails

  • Renewable energy systems such as solar inverters

The wide input voltage range, up to 36V, allows the TPS5430DDAR to work with diverse power sources found in factories and plants. Its high efficiency and thermal performance help reduce energy loss and heat buildup. The compact 8-pin SOIC package fits into tight spaces, making it ideal for embedded power supplies. Integrated protection features, including overcurrent and thermal shutdown, ensure reliable operation in harsh conditions.

Note: The adjustable output voltage and robust design make the TPS5430DDAR a flexible solution for industrial control systems.

Consumer

Consumer electronics benefit from the TPS5430DDAR’s compact size and efficient operation. Designers use this device in set-top boxes, DVD players, and LCD displays. It powers microcontrollers, sensors, and other sensitive components in these products.

• Typical consumer applications:

  • Set-top boxes and embedded systems

  • DVD players and LCD displays

  • Home networking devices

The fixed 500kHz switching frequency and built-in compensation allow for smaller external components. This feature supports compact and cost-effective circuit designs. The soft-start function protects sensitive electronics by preventing voltage surges during power-up. Reliable protection features, such as overcurrent and thermal shutdown, extend device life and maintain safety.

The TPS5430DDAR operates efficiently across a wide temperature range, making it suitable for consumer devices used in various environments.

Automotive

Automotive systems demand reliable and robust power management. The TPS5430DDAR meets these needs in infotainment systems and advanced driver-assistance systems (ADAS). Its wide input voltage range, from 5.5V to 36V, supports automotive power sources.

• Automotive applications include:

  • Infotainment modules

  • Lighting and safety systems

  • ADAS and sensor hubs

The compact package and strong thermal performance allow the device to fit into space-limited automotive modules. The TPS5430DDAR is RoHS-compliant and Pb-free, meeting environmental standards required in the automotive industry. Although specific automotive qualification standards are not stated, the device’s reliability and protection features make it a trusted choice for vehicle electronics.

Engineers select the TPS5430DDAR for automotive projects that require efficient, protected, and space-saving power solutions.

Comparison

Advantages

The TPS5430DDAR stands out among buck converters for several reasons. Engineers value its high efficiency, robust protection, and ease of use. The device achieves up to 95% efficiency, which reduces power loss and heat. It delivers up to 3A of output current, placing it in the mid-current range for Texas Instruments converters. The integrated low-resistance (110mΩ) N-channel MOSFET further improves efficiency and minimizes external components.

The TPS5430DDAR also features a wide input voltage range, making it suitable for automotive and industrial systems. Its internal compensation and soft-start functions simplify design and protect sensitive components. The enable pin allows for low shutdown current, which benefits battery-powered devices. The device comes in tape and reel packaging, supporting automated assembly for large-scale production.

The TPS5430DDAR provides reliable performance in harsh environments, thanks to its wide operating temperature range and robust protection features.

Limitations

While the TPS5430DDAR offers many strengths, it has some limitations compared to other buck converters. The device supports up to 3A of output current, which may not meet the needs of high-current applications. Some competing converters provide higher output currents or adjustable switching frequencies for greater flexibility.

• The fixed 500kHz switching frequency may not suit all designs, especially those requiring lower electromagnetic interference (EMI).

• The device does not include advanced features like synchronous rectification, which can further improve efficiency in some cases.

• The input voltage range, while broad, may not cover ultra-low voltage sources below 5.5V.

• The SOIC-8 PowerPAD package, though compact, may not fit ultra-miniature designs that require smaller footprints.

Market availability can fluctuate, as seen in recent inventory and price trends. Engineers should check distributor stock levels before finalizing designs.

Designers should consider these factors when selecting a buck converter for their specific application. The TPS5430DDAR excels in efficiency, reliability, and ease of use, but may not fit every project’s requirements.

The TPS5430DDAR offers engineers a reliable solution for efficient power management. Its wide input voltage range, high output current, and robust protection features support diverse applications. The following table highlights key strengths:

Designers often select this device for industrial automation, consumer electronics, and medical equipment where stable, protected power is essential.

FAQ

What is the maximum input voltage for the TPS5430DDAR?

The TPS5430DDAR accepts input voltages up to 36V. This wide range supports many power sources in industrial and automotive systems.

Can engineers use the TPS5430DDAR for battery-powered devices?

Yes. The device features low quiescent current and high efficiency. These qualities help extend battery life in portable electronics.

What protection features does the TPS5430DDAR offer?

The TPS5430DDAR includes overcurrent protection, thermal shutdown, and undervoltage lockout. These features help prevent damage and ensure safe operation.

Which package type does the TPS5430DDAR use?

The SO-PowerPAD-8 package supports efficient heat dissipation and fits in space-limited designs.

See Also

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An Overview Of Temperature Sensor Chips And Features

Introduction To Step-Down Converter Integrated Circuits

A Guide To Battery Charger Controller IC Applications