TPS54314PWP

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TPS54314PWP Application Field and Working Principle

The TI TPS54314PWP is a high frequency, synchronous, dual output, buck (step-down) regulator designed to provide power accurately to processor cores, memory, input/output (I/O), and other chipset circuits in space- and thermal-constrained applications. This integrated regulator can support voltage and current regulation of dual 2.5-V to 3.9-V outputs with a solution size of 50 mm2. The TPS54314PWP synchronous DC/DC regulator is part of the family of PMIC - Voltage Regulators - DC DC Switching Regulators.

Features of TPS54314PWP

• 2- to 3.9-V output voltage range
• 45 V input voltage range
• Constant switching frequency at 475 kHz (typical)
• Integrated switching gate drivers
• Integrated 100-mΩ (typical) and 40-mΩ (max) high-side and low-side MOSFETs
• Integrated inductor
• Integrated soft start and dynamic voltage scaling
• Integrated output chokes to reduce electromagnetic interference (EMI)
• Drives up to 18-A load currents
• On-chip power supply sequencing
• Accurate output voltage from 0.5% (typical)
• Separated output channels for system safety
• High efficiency up to 95%

Application Fields

The TPS54314PWP buck synchronous DC/DC regulator can be used in various types of applications, such as digital signal processor (DSP), microprocessor (MPU), audio codec and video processor applications, data I/O, power management and industrial controllers, as well as with precise voltage regulation in switches, routers, multiplexers and other communication equipment.

Working Principle

The TPS54314PWP buck synchronous DC/DC regulator is designed to provide dual constant-voltage output with two synchronized voltage conversion streams. The device utilizes a high-density switched-mode power converter to efficiently step down an input voltage from 45 V to one or both of the two programmable the output voltages. The TPS54314PWP buck regulator offers a unique design that integrates slim, low-profile inductors, a gate driver, high-side and low-side MOSFETs, and a current-sense voltage divider. This reduces external components and streamlines board layout, resulting in a more compact solution.

The TPS54314PWP has an internal synchronous switching controller to allow for current mode control. This gives the TPS54314PWP the ability to deliver power more efficiently during all load conditions and provide more accurate, independent regulation of each output voltage over temperature, line, and load variations. The switching frequency is adjustable and can be tailored to the application demand, while an accurate output voltage of 0.5% over line, load, and temperature (TJ = -40°C to 125°C) gives the TPS54314PWP excellent capability and versatility.

The TPS54314PWP utilizes integrated high-side/low-side MOSFETs for optimized efficiency and simple design. The drift is further reduced with a power-on-reset feature that allows for precise output regulation over temperature, line and load variations. The integrated soft-start circuit reduces start-up time and limits inrush current by gradually increasing the output voltage from 0 V up to the steady-state voltage and reduced output voltage overshoots.

The device also incorporates fault protection features that include an adjustable overvoltage protection, undervoltage and overcurrent protection, and a thermal shutdown. These protection features ensure system protection during fault conditions and provide a robust, reliable solution over the long term. The TPS54314PWP can operate in either continuous or discontinuous conduction mode, depending on the output powers and the number of channels. By incorporating constant on-time and current limit control, the device monitors the switch currents and is able to control the output currents and voltages with great precision.

Conclusion

The TPS54314PWP buck synchronous DC/DC regulator is a unique device that is designed for processor cores, memory, I/O, and other chipset circuits. It integrates all the necessary components for voltage and current regulation, and offers high efficiency, an adjustable switching frequency, accurate output voltage regulation, integrated inductors, ultra-low quiescent current, soft start, and all the fault protection features. The TPS54314PWP is also part of the PMIC - Voltage Regulators - DC DC Switching Regulators.

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