RT6154AGQW

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PMIC - Voltage Regulators - DC DC Switching Regulators

RT6154AGQW is an integrated high efficiency DC/DC synchronous buck converter with a robust feature set in a compact 3mm x 3mm 16-pin QFN package, providing a comprehensive power supply solution for applications of up to 10A. The advanced high efficiency, low noise digital architecture of RT6154AGQW makes it suitable for high voltage, low power, digital and RF applications. This article will present the application field and working principle of the RT6154AGQW DC/DC synchronous buck converter.

Application Field - The RT6154AGQW is an ideal choice for providing an efficient and reliable power supply to processor cores, with its ability to dynamically adjust output voltage. Its ability to support up to 10A output current makes it suitable for highpower applications. It can also be used as a post-regulation system to reduce power losses due to conversion inefficiencies in low power applications. Furthermore, the maximum frequency of the device is 1MHz, making it suitable for high speed applications such as FPGAs and ASICs.

Working Principle - RT6154AGQW is a Buck DC/DC synchronous converter topology, which means that the DC voltage is regulated by controlling the current in the inductor. The basic working principle of this converter is as follows. The input voltage is used to charge the inductor coil, thus increasing the magnetic field surrounding it. This increase of the magnetic field in turn induces a voltage across the positive and negative switches. The regulated output voltage is then obtained by controlling the duty cycle of these switches using a Pulse Width Modulation (PWM) signal. The PWM signal is generated by the integrated Digital Audio PWM Controller (DAPWC) within the device. The DAPWC also keeps the output voltage within ±3% of the setpoint.

To further improve the efficiency and transient performance of the converter, RT6154AGQW employs several other techniques such as Programmable Output Voltage Ripple Controller (PORC) and Adaptive Non-Overlap Control (ANOC). PORC uses a low frequency ripple on the output voltage to reduce the voltage ripple at light load conditions. ANOC operates at fixed times after the switching event has been triggered so as to ensure an efficient operation regardless of the environmental conditions.

The RT6154AGQW utilizes an internal voltage reference (VREF) and an adjustable resistor network to set the output voltage. The VREF is also used to compensate the output voltage as a function of temperature and load changes. An integrated Multiple Feedback Low-Pass Filter (MFLF) located at the output helps to reduce noise and reduce electromagnetic interference. The device also has several integrated safety features such as Over Voltage Protection (OVP), Under Voltage Lockout (UVLO), Over Current Protection (OCP) and Thermal Protection (TP).

The RT6154AGQW’s wide range of features, coupled with its small form factor and high power efficiency make it an ideal choice for many consumer and industrial applications. The device is available in an industry-standard 16-pin QFN package and is suitable for reflow soldering process and are compatible with both Lead Free and Lead-free assembly.

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