TPS62231TDRYRQ1

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TPS62231TDRYRQ1 Application Field and Working Principle

The TPS62231TDRYRQ1 is a DC/DC step-down converter that belongs to the Texas Instruments PMIC (Power Management IC) Voltage Regulators family. This power converter is an outstanding choice for high efficient, current integrated, point-of-load step-down applications. It allows high integration levels and offers best-in-class performance. The TPS62231TDRYRQ1 supports a wide input voltage range from 4.5 V to 18 V, delivering up to 4 A of continuous output current and an adjustable output voltage from 0.8 V up to 1.8 V. Additionally, the TPS62231TDRYRQ1 has a very low quiescent current of 0.11 μA in shutdown mode and a high ripple rejection, making it an ideal choice for applications in which high efficiency, very low shutdown current and clean output power supply are required such as medical devices, industrial, wired/wireless systems, and Telecom.

The TPS62231TDRYRQ1 is a synchronous, step-down DC/DC converter. It offers high efficiency by using a 3-phase interleaving control scheme powered by two internal 6.5 V power NMOS transistors. The 3-phase interleaving scheme, based on the resonant valley-current-mode control topology, reduces output ripple and achieves a low output noise. In addition, the power converter includes an internal VDD regulator, an always-on-LDO, and a power-good indicator.

Operation Principles

The TPS62231TDRYRQ1 operates in discontinuous-current-mode(DCM), making it suitable for applications such as low-current standby, with very low high frequency noise. It also includes a power-good indicator that works as a voltage-protection monitor. This feature helps to protect the integrated circuits against any unexpected power surge or voltage drop.

The operation of the TPS62231TDRYRQ1 is divided into three stages. First, the resonant valley-current-mode control topology is used to supply the main power rail. This stage, which is designed for high efficiency, is externally synchronized using an external clock. Secondly, an internal VDD regulator supplies power to the internal LDOs. This ensures that the SOIC-8 package and the parts involved in communications are powered in the event of an unexpected voltage drop. Thirdly, the TPS62231TDRYRQ1\'s power-good indicator informs the system when the voltage applied to the output is above or below the assigned value.

Output Ripple Rejection

The TPS62231TDRYRQ1 supports a wide input voltage range and has an excellent output ripple rejection. The output ripple produced by the converter depends on the type of power supply used and the frequency of operation. By using a 3-phase interleaving control scheme, the converter produces a low output ripple. The ripple rejection is also improved by the use of a low ESR output capacitor.

Output Current

The TPS62231TDRYRQ1 can deliver up to 4 A of continuous output current. The output current of the converter is limited by an internal current-limit circuit. The current limit is set to 4A and can be adjusted through an external resistor. With the current limit set to 4A, the converter is able to deliver up to 4 A of continuous output current.

Input Voltage Range

The TPS62231TDRYRQ1 supports a wide input voltage range from 4.5 V to 18 V. This wide input voltage range makes it suitable for applications powered from high voltage sources such as industrial, telecommunication, and automotive systems. The wide input voltage range allows the converter to operate efficiently from these high voltage sources without the need for additional line regulation.

Efficiency

The TPS62231TDRYRQ1 is designed for high efficiency. The converter uses a 3-phase interleaving switching scheme which reduces switching losses and achieving a high efficiency over a wide range of output currents. In addition, the use of a low-ESR capacitor helps to reduce output ripple and improve overall efficiency.

Package

The TPS62231TDRYRQ1 is available in a compact SOIC-8 package, making it suitable for space-constrained applications. The package features thermal-pad with an exposed paddle which must be connected to a ground plane on the PCB, this will help to improve the thermal performance and reduce thermal stress on the IC.

Applications

The TPS62231TDRYRQ1 is a great choice for efficient, current integrated, point-of-load step-down applications. It is ideal for applications that require high efficiency, very low shutdown current, and clean output power supply, such as medical and industrial applications, wired/wireless systems, and Telecom. It is also suitable for automotive applications such as vehicle battery or infotainment systems, as well as enterprise and residential distributions systems.

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