TPS54550PWPG4 Application Field and Working Principle

Classification: PMIC - Voltage Regulators - DC DC Switching Regulators

The TPS54550PWPG4 is a DC/DC stepdown integrated Switching Regulator designed for mobile and other power supply applications. A high-efficiency synchronous 4-phase buck controller enables power conversion from a wide input voltage range of 4.5V to 18V. The adjustable 80A continuous output current and tight 0.6mΩ Ron power switches support high power designs. The output voltage adjustable range is 0.6V to 5.5V with 0.1V resolution to provide the design flexibility required. The device is integrated with rich set of bill of material (BOM) reduction features and ease design and optimization by providing wide range of performance characteristics.

Application Fields

The TPS54550PWPG4 is a highly advanced DC/DC stepdown integrated Switching Regulator specially designed for mobile applications and other power supplies. Its outstanding power efficiency and excellent features provide the design flexibility to meet the stringent requirements of modern electronic devices. With wide range of performance characteristics, it can be used in a wide range of applications including industrial, automotive, medical, and consumer electronics.

Working Principle

The integrated Switching Regulator comprises of four power switches, a control circuitry and an integrated magnetics. It operates on a synchronous 4-phase buck concept. Here, two phase are operated in the forward direction and other two phases are operated in reverse direction. This process is repeated at regular intervals to maintain constant power supply. The switching operation is controlled by a high-efficiency PWM control logic. It also has an integrated OCP (over current protection), OTP (over temperature protection) and UVP (under voltage protection) circuits to ensure reliable operation. A constant frequency pulse width modulation (PFM) control scheme is used to control the switching for extended battery life of mobile devices.

The 4-phase operation reduces the input voltage ripple, improves efficiency at light load and delivers high power density. The low RON MOSFETs along with the type four inductor reduces the power losses and increases the efficiency. The feedback circuit senses the output voltage and adjusts the switching frequency accordingly to maintain the voltage stability. This enhances the system performance and long-term reliability.

Features

Some of the features of the TPS54550PWPG4 DC/DC stepdown integrated Switching Regulator are:

• Wide input voltage range of 4.5V to 18V
• 80A continuous output current
• High-efficiency synchronous 4-phase buck controller
• Output voltage range from 0.6V to 5.5V
• Output voltage resolution of 0.1V
• PFM control for extended battery life
• Integrated OCP, OTP, and UVP circuits
• Rich set of BOM reduction features

Conclusion

The TPS54550PWPG4 is a highly advanced DC/DC stepdown integrated Switching Regulator designed for mobile applications and other power supplies. Its wide range of features and excellent performance characteristics make it a highly reliable solution for various applications. It offers a high efficiency, power density, current limits and performance optimization for an extended battery life. Overall, it is an ideal Switching Regulator for modern consumer electronics.