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PMIC - Voltage Regulators - DC DC Switching Controllers

Introduction

The UCC3813DTR-5G4 is a high-efficient, low-dropout synchronous buck DC-DC controller, which is specifically designed for low-cost, low-noise and high-current applications. It offers a unique combination of features to realize high-efficiency, high-precision and low output voltage ripple in a wide dynamic range. With an operating frequency up to 300kHz, it can provide the system with complete current and power monitoring functions, as well as full cycle-by-cycle real-time protection.

Application Field

The UCC3813DTR-5G4 is ideally used in a wide range of voltage conversion applications, including distributed power systems, computer peripherals, secondary power rails, automotive and processor core supply. It is specifically designed to meet the needs of low-cost, low-noise and high-current applications.

The device can be used in various voltage systems, including those with a single- or multiple-cell output. It is particularly suitable for applications that need to meet the tight current and voltage regulations associated with distributed power supplies, PC power management, automotive application and processor cores. In such applications, the UCC3813DTR-5G4 is capable of providing high-efficiency and low-noise operation over a wide dynamic range.

Working Principle

The UCC3813DTR-5G4 employs a synchronous-buck topology to convert a given input voltage to a regulated output voltage. The device utilizes a voltage-mode control architecture, which allows for fast and precise voltage regulation over a wide dynamic range.

The UCC3813DTR-5G4 uses an internal voltage-mode PWM controller and logic control to ensure that the output voltage is accurately regulated, even under light-load conditions. The device employs a precision voltage-mode PWM control core that is able to accurately regulate the output voltage throughout its dynamic range. To ensure robust transient response, it employs an advanced feed-forward control method that detects the voltage of the output stage’s feedback signal and adjusts the output voltage accordingly.

To provide reliable protection against overvoltage and short-circuits, the UCC3813DTR-5G4 is designed to provide a built-in cycle-by-cycle real-time protection. This feature helps to protect the load from high-voltage spikes and overcurrent due to a short-circuit.

The UCC3813DTR-5G4 also offers an integrated monitoring and control system for current and power. The device is capable of measuring the output voltage, current and power directly from the feedback signal. This helps to monitor the power and current of the system, as well as to detect any potential problems.

Overall, the UCC3813DTR-5G4 is an ideal choice for low-cost, low-noise and high-current applications. With its high-precision voltage regulating, power monitoring and protection functions, the device is capable of providing reliable and efficient performance.

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