TPS5120QDBTRQ1G4 Integrated Circuits (ICs)

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The TPS5120QDBTRQ1G4 is a synchronous step-down DC-DC converter controller designed to provide power to low voltage processors, such as mobile phones, digital cameras and other mobile devices. It is part of the Power Management IC (PMIC) – Voltage Regulators – DC DC Switching Controller IC product family of Texas Instruments. This IC can provide up to 1.5 A of output current and supports power supply operating voltages up to 20 V.

The IC includes input voltage surge protection to guard against sudden changes in the power supply voltage, while its output voltage spike protection helps to protect the load from any overvoltage or undervoltage. The device also includes short circuit and thermal protection to ensure reliability of the converter and stability of the system.

The working principle of the TPS5120QDBTRQ1G4 is based on an adaptive on-time control (AOT) architecture, which enables it to regulate the output voltage accurately and efficiently. The device is operated in two phases: first, it utilizes an adaptive on-time pulse-width modulation algorithm to switch the power switch FET with a fixed frequency; and second, it adjusts the on-time of the current-mode PWM loop to modulate the output voltage. The adaptive on-time control helps to reduce the ripple voltage on the output line and improves the overall efficiency of the converter.

The TPS5120QDBTRQ1G4 includes advanced features that make it an ideal choice for applications that require low output voltage ripple and fast conversion time. It also offers wide input voltage range and adjustable output voltage, allowing it to be used in multiple applications. Its internal soft-start circuit provides smooth and consistent start up and its adjustable frequency enables the user to select the optimised frequency for given application.

The device also offers a wide range of protection features, such as input voltage protection and thermal shutdown, to protect the system from overvoltage or undervoltage threats. It also includes an integrated start-up and shutdown controller and a low quiescent current standby mode, making it suitable for use in low power applications. Moreover, the integrated loop compensation circuit minimizes the external components for ripple cancellation, further reducing the system cost.

In conclusion, the TPS5120QDBTRQ1G4 is a highly integrated DC-DC converter controller from Texas Instruments’ PMIC–Voltage Regulators–DC DC Switching Controller IC family, designed for use in low voltage, mobile applications requiring high efficiency, low output voltage ripple and fast conversion time. It offers a wide input voltage range, adjustable output voltage and several protection features to protect the system from overvoltage and undervoltage threats. Its integrated loop compensation minimizes the system cost and its adjustable frequency enables the user to select the best frequency for given application.

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