TPS54314QPWPRQ1

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TPS54314QPWPRQ1 Application Field and Working Principle

TPS54314QPWPRQ1 belongs to the Part Family of TPS54314 series voltage regulator, a low dropout regulator, operated in 3V to 30V voltage range. It provides up to 5A output current with a typical dropout of 0.45V in 1.5MHz frequency switching mode. TPS54314 also features a fast current limit, high PSRR, and excellent line/load transient performance, built in over temperature protection (OTP), power good output indicator, a low quiescent current of 45µA, and a normal shutdown current of 50nA. Its small size and high performance design makes it an ideal choice for applications with high current load and small system solution size.

Application Field

The TPS54314QPWPRQ1 voltage regulator is a highly integrated power management IC, suitable for space-constrained applications such as smartphones, tablets, and other mobile devices. It is recommended for operating many kinds of DC-to-DC power conversion requirements with high-efficiency, switching very fast (<2us) at low input voltages. Some most common applications with TPS54314QPWPRQ1 as the power management unit include:

• Battery charger for Li-ion/ Li-pol batteries, especially applicable for Li-ion/ Li-pol battery chargers with high efficiency, fast response, and small size.
• High-efficiency optimal voltage supply for automotive, industrial, or other applications.
• High-performance power management units for digital products such as cellphones and other portable devices with high input voltage tolerance.

Working Principle

The TPS54314QPWPRQ1 is a switching regulator based on a synchronous boost topology. It consists of a voltage regulator, operational amplifier (OPA), LDO, switching MOSFET, Flyback diode, input latch, output latch, and various protection circuitry. In operation, the voltage regulator first amplifies the input voltage, than the LDO ensures a stable output voltage even when the input voltage fluctuates. Then the OPA compares the amplified input voltage with the feedback voltage, and adjusts the switching frequency accordingly. Finally, the high-side and low-side MOSFETs alternatively switch the current flow in flyback mode, and the Flyback diode provides a continuous flow of current to the output stage, thus creating a stable voltage output.

The TPS54314QPWPRQ1 provides better performance compared to traditional linear regulators, such as higher efficiency, smaller size, and better output stability. Despite its PWM-based regulation, the TPS54314QPWPRQ1 is protected for all the external components, so no external protection circuit is necessary. Industry-grade regulatory testing and reliability monitoring capabilities ensure a reliable and accurate operation.

In conclusion, TPS54314QPWPRQ1 is a perfect fit for DC-to-DC switching regulators with high input voltage range, fast switching frequency, high output current, small size, and excellent regulation performance.

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