RT8058GQW Integrated Circuits (ICs)

RT8058GQW Application Field and Working Principle

The RT8058GQW is one of the many DC/DC switching regulator available from Richtek Technology Corporation. This device combines all control, moderate to high voltage adjustment, power MOSFET and an oscillator within a single 3mm2 SOT23-5 package, providing cost-effective solutions for a wide range of applications.

The RT8058GQW is specifically designed to simplify the high step-down power conversion and improve efficiency. The device adopts a wide 4.5V to 24V input voltage range and a synchronous P-channel power MOSFET to output excellent power performance. The on-board PWM controller features a 1.3MHz fixed switching frequency, allowing it to operate without noise sensitive components in the board design. This high frequency and very low-noise operation, together with the high efficiency makes the RT8058GQW perfect for energy-conscious and space-sensitive applications.

Where long-term device stability, reliability and efficiency are paramount, the RT8058GQW has an on-board voltage detector and temperature monitor capability in addition to monitoring output voltage via an adjustable voltage reference; this ensures that system performance is maintained. All of this can be achieved over the full industrial temperature range (-40°C to +105°C) with low ripple and low noise operation.

The Working Principle of the RT8058GQW

The RT8058GQW\'s control circuit consists of an internal 200mΩ N-channel MOSFET, operating in continuous conduction mode (CCM) with both current and voltage regulation and PWM control. It also includes a 1:2 voltage reference for voltage regulation and a 0.8V voltage detector for power good indication. The device utilizes omron\'s soft-start current limitation circuit, allowing for excellent thermal performance, better output ripple and less component stress during start-up. The RT8058GQW also has an adjustable input current limit and short-circuit protection capability.

The RT8058GQW\'s switching circuit consists of a 200mΩ N-channel MOSFET, operating in a synchronous PWM/PFM mode. The switching frequency is adjustable and a 1.3MHz fixed clock is provided to eliminate component selection without compromising efficiency and power density. The RT8058GQW also has an adjustable average current mode control and a soft current limit function to minimize component size and power consumption.

The Application Fields of the RT8058GQW

The RT8058GQW is suitable for a large variety of applications, such as server power supplies, telecom power system, ATE equipment, LED lighting and solar-energy applications. It is also suitable for battery-powered applications, supporting 3.2V to 8V output and DC/DC buck/boost mode.

The RT8058GQW is ideal for automotive and industrial applications due to its high efficiencies. It includes a 2.5V voltage adjust with ±1.0% accuracy and fast transient response. The device also features excellent EMI performance; it is RoHS compliant and the pin-outs are fully compatible with the existing standard of many similar controllers.

The RT8058GQW has effective thermal and current protection functions. It provides a soft current limit over-temperature protection, over-voltage protection, under-voltage lockout, input over-voltage and reverse-polarity protection. This device also features overload protection and over-current protection and offers excellent dynamic load transient performance.

The RT8058GQW is an ideal solution for energy-conscious applications requiring fast transient and high efficiency. Its key features and wide input voltage range have opened up a host of possibilities in terms of reduced component sizing, improved system performance and increased reliability.