Richtek USA Inc. RT5090FGQW

Overview

RT5090FGQW from Richtek USA Inc. is a TV-system power-management solution integrating one buck controller, three high-efficiency synchronous buck converters, one LDO, an I2C control interface, and peripheral logic functions. The device is designed to build a sequenced multi-rail power tree from a 12V to 24V input system or a 12V to 24V rail plus 3.3V standby supply.

As part of the RT5090F product family, RT5090FGQW combines BUCK1 5V power-controller support, programmable BUCK2/BUCK3 dynamic-voltage-scaling outputs, a BUCK4 converter, 0.6A LDO capability, mute and AC-off depop support, UV/OV protection, SOC reset, and a WQFN-40L 5x5 package. For engineers reviewing the RT5090FGQW datasheet, RT5090FGQW pinout, RT5090FGQW application, or RT5090FGQW equivalent, this device is widely used in TV main boards, display electronics, multimedia systems, embedded control boards, audio/video platforms, and compact multi-rail digital power systems.

Technical Context

In TV and display power systems, RT5090FGQW coordinates several rails through one external-MOSFET buck controller, three integrated synchronous buck converters, and an LDO output. This allows a main board to generate processor, memory, logic, audio, and peripheral supplies from a 12V to 24V source.

BUCK2 supports a 3.5A converter with programmable 0.7V to 1.5V DVS control, BUCK3 supports 6A operation with an external low-side MOSFET and programmable 0.7V to 1.5V output, and BUCK4 supports a 3A programmable output. The I2C interface provides rail programming, event reporting, and power-management configuration.

RT5090FGQW is commonly used where a TV or multimedia platform needs sequenced multi-output power, mute/depop handling, SOC reset behavior, UV/OV protection, and a 40-pin WQFN package.

Key Specifications

Pinout & Package

The RT5090FGQW pinout includes BUCK1 gate-drive pins, BUCK2/BUCK3/BUCK4 switch and sense pins, LDO feedback/output pins, I2C pins, mute pins, reset/status pins, input supply pins, and exposed power ground.

For PCB design, high-current buck paths should be short, sense traces such as VSEN/RGND should be routed carefully, I2C lines should be pulled up cleanly, and the WQFN exposed pad should connect to thermal ground.

Key Features

• Integrates one buck controller, three buck converters, and one LDO.
• I2C interface supports rail configuration and status reporting.
• BUCK2 and BUCK3 DVS outputs support 10mV-step programming.
• Mute and AC-off depop functions support TV audio systems.
• UV and OV protection improve system robustness.
• WQFN-40L 5x5 package supports dense TV main-board layouts.

Applications

Equivalent & Alternatives

When evaluating a RT5090FGQW equivalent, engineers should compare topology, input range, output current, rail count, switching frequency, package, protection behavior, and control interface requirements.

Compared with RT5091FGQW, RT5090FGQW should be selected when the RT5090F rail map, I2C behavior, mute/depop functions, and WQFN-40L pinout match the TV main-board design. RT5090FGQW vs TPS65262RHBR selection depends on rail count, DVS programming, audio-control functions, and output-current requirements.

Quality

RT5090FGQW should be sourced as original Richtek USA Inc. components through traceable supply channels. Quality checks may include package inspection, top-mark validation, solderability testing, startup verification, output-voltage accuracy testing, load-transient testing, and thermal review.

Production validation should include switching ripple, LDO regulation, current-limit behavior, protection response, I2C or control timing where applicable, and PCB layout review for high-current paths.

Availability

RT5090FGQW available at Aetrix Electronics and is suitable for TV systems, notebook platforms, embedded computing, industrial controllers, communication electronics, and compact multi-rail regulator applications.

Supply support may include volume procurement planning, scheduled delivery arrangements, traceable sourcing management, and long-term supply support for OEM, industrial electronics, automotive electronics, and embedded product programs. Sample and NPI supply support, as well as urgent in-stock supply support, can also be arranged for prototype builds, pilot runs, and time-critical production needs.

For production builds, confirming package, output configuration, lifecycle status, lead time, and sourcing continuity helps reduce procurement risk.

Manufacturer

Richtek Technology, now part of MediaTek, is a semiconductor manufacturer specializing in power-management ICs, DC-DC converters, LDO regulators, battery-management devices, LED drivers, and industrial, computing, communication, and consumer power solutions.

The RT5090F family is a Richtek TV-system PMIC family integrating one buck controller, three synchronous buck converters, an LDO, I2C control, mute/depop logic, and protection functions for display and multimedia power trees.

FAQ

What is RT5090FGQW used for?

RT5090FGQW is used for Richtek multi-rail power management in systems that need compact switching and auxiliary regulator functions.

Where can I find the RT5090FGQW datasheet download?

The datasheet is available from Richtek or authorized distributor documentation.

What should be considered in RT5090FGQW pinout design?

Designers should keep high-current switching paths compact, separate feedback and sense traces from noisy nodes, and connect exposed pads to low-impedance thermal ground.

What are common RT5090FGQW equivalent solutions?

Common candidates include RT5091FGQW and TPS65262RHBR depending on rail count, current, package, and system architecture.