TPS542951PWPR Integrated Circuits (ICs)

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TPS542951PWPR Application Field and Working Principle

The TPS542951PWPR is a synchronous, high-efficiency DC/DC switching regulator that can deliver up to 5 A continuous current from a 2.5 V to 5.5 V input to 1.8V and 3.3V output voltages, offering up to 90% efficiency and very low quiescent current. It belongs to the PMIC – Voltage Regulators – DC DC Switching Regulators classification and is designed to help save power and size in power-critical applications.

This device offers flexible features to control the device’s output voltage, such as programmable Soft-start and output voltage slew rate options, and a programmable output voltage via I2C. It also features integrated over-current protection and hiccup protection, which act as a safety net and protect the device against any potential over-current situations. With its low quiescent current, TPS542951PWPR is extremely suitable for battery-powered applications with stringent power requirements, such as in wearable, medical, and other IoT devices.

TPS542951PWPR Working Principle

The TPS542951PWPR DC/DC switching regulator employs a synchronous buck architecture, which enables maximum input voltage range from 2.5 V to 5.5 V and output voltage range from 1.3 VDC to 3.6 VDC. The device has a high-level current-mode control which provides fast transient response. The control loop uses external components to shape the PFM (pulse frequency modulation) waveform, generate the required output voltage and set the switching frequency. In addition, the device is designed to minimize switching noise and minimize intervention of external components, thus allowing the device to be optimized for power density.

The wide supply voltage range grants great flexibility in powering applications running at different input voltages. When the input voltage exceeds the maximum operating range, the internal protection circuitry limits the input current. An integrated level shifter is also available, allowing the device to operate on the same voltage rails but at different voltage levels. This eliminates the need for external level shifters and helps reduce overall power losses.

The TPS542951PWPR DC/DC switching regulator also integrates a power MOSFET, which ensures efficient switching and combines its internal components as part of its advanced power management design. It also operates at a constant frequency and with synchronous rectification, which helps reduce switching losses and improve efficiency over the entire operating range. In addition, the device includes an adjustable soft-start feature, which helps reduce inrush current by ramping up the output voltage. This feature can be programmed via the I2C interface.

Conclusion

The TPS542951PWPR is a high-performance synchronous DC/DC switching regulator designed to deliver 5A continuous current from 2.5V to 5.5V input voltage to 1.8V and 3.3V output voltages with up to 90% efficiency. This device offers flexible features to control the device\'s output voltage, such as programmable Soft-start and output voltage slew rate options, a programmable output voltage via I2C, integrated over-current protection, and hiccup protection. Along with its low quiescent current, the TPS542951PWPR is ideal for battery-powered applications with stringent power requirements such as in wearable, medical, and IoT devices.

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