TPS544B25RVFR

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The TPS544B25RVFR is a synchronous buck-boost DC/DC regulator designed by Texas Instruments (TI). This voltage regulator is most commonly used in applications that require regulated output voltage with minimum components and low ripple. It features various features such as logic enable, hysteretic operation, current and thermal monitoring, and operational safety features.

Application Field

The TPS544B25RVFR is most suitable for applications that require a wide input voltage range, such as battery-powered systems, and high-efficiency applications such as LED lighting. Moreover, the adjustable output voltage ranges from 1.2 V up to 5.5 V, making it ideal for numerous systems that require a wide output voltage range. It can even be used for automotive applications, thanks to its -40°C to +125°C temperature range. Some other application areas this voltage regulator is suitable for include microprocessors, ASICs, FPGAs, portable devices and many more.

Working Principle

The TPS544B25RVFR has a synchronous buck-boost topology, meaning its input voltage is both bucked and boosted as it passes through the voltage regulator. This allows the input voltage to be effectively regulated to a predetermined output voltage without excessive power losses. Additionally, due to its hysteretic operation, the output voltage is maintained with minimum switching losses and low ripple voltage.

The TPS544B25RVFR also features a slew-rate controlled internal oscillator, reducing RF emission and improving efficiency and thermal performance. Furthermore, it operates using current-mode control and features a logic enable pin, to control either variable frequency or pulse-skipping frequency modulation modes. As a result, the TPS544B25RVFR is able to achieve excellent load regulation over a wide range of operating conditions.

Protection Features

The TPS544B25RVFR also includes several operational safety features, such as under-voltage lockout (UVLO), over-voltage protection (OVP) and over-current protection (OCP). It also features an over-temperature protection (OTP) module, which shuts down the regulator in case it exceeds a critical temperature threshold. All of these features improve the operational safety of the voltage regulator and ensure reliable operation in a wide range of environments.

Conclusion

The TPS544B25RVFR is a versatile voltage regulator, most suitable for applications that require a wide input voltage range, a wide output voltage range and low ripple. With its synchronous buck-boost topology, it can be used for a variety of applications such as automotive, portable devices, LED lighting and many more. Its slew-rate controlled internal oscillator and numerous safety features also make it an excellent choice for reliable and cost-effective performance.

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