Richtek USA Inc. RT6318CGQUF

Overview

RT6318CGQUF from Richtek USA Inc. is an 8A synchronous step-down converter with an integrated auxiliary LDO regulator. The device combines a high-current buck output with a 5V low-current linear output, making it useful for compact systems that need both efficient main power conversion and a local support rail.

As part of the RT6318B/RT6318C product family, RT6318CGQUF combines a 5.1V to 23V supply range, 750kHz switching operation, 8A buck output capability, 100mA LDO output support, and a 12-UQFN-HL 3x3 package. For engineers reviewing the RT6318CGQUF datasheet, RT6318CGQUF pinout, RT6318CGQUF application, or RT6318CGQUF equivalent, this device is widely used in embedded computing boards, industrial controllers, communication modules, notebook power rails, point-of-load supplies, and compact mixed-signal power systems.

Technical Context

In local power-conversion systems, RT6318CGQUF uses a synchronous buck stage to convert a 5.1V to 23V input into a high-current regulated rail. The 750kHz switching frequency supports compact inductors while maintaining efficient conversion for several-amp loads.

The integrated LDO output provides a 5V, 100mA class auxiliary rail for bias, logic, or support circuitry. Combining the buck converter and LDO in a 12-UQFN-HL package reduces separate regulator count and saves PCB area.

RT6318CGQUF is commonly used where a board needs an 8A step-down rail, a small auxiliary 5V LDO, high junction-temperature capability, and a compact 3mm x 3mm power package.

Key Specifications

Pinout & Package

The RT6318CGQUF pinout includes input supply, switch-node, bootstrap, feedback, LDO, enable, compensation, ground, and exposed thermal-pad functions for the buck-plus-LDO architecture.

For PCB design, the buck input capacitor and inductor loop should be close to the IC, the feedback divider should be placed away from LX noise, and the exposed pad should connect to thermal copper.

Key Features

• 8A synchronous buck output supports high-current local rails.
• Integrated 5V/100mA LDO supplies auxiliary circuits.
• 5.1V to 23V input range supports adapter and intermediate-bus designs.
• 750kHz switching supports compact external components.
• 12-UQFN-HL 3x3 package saves PCB area.
• High junction-temperature rating supports dense power layouts.

Applications

Equivalent & Alternatives

When evaluating a RT6318CGQUF equivalent, engineers should compare topology, input range, output current, rail count, switching frequency, package, protection behavior, and control interface requirements.

Compared with RT6310CGQUF, RT6318CGQUF is selected when the RT6318 8A buck plus auxiliary LDO structure and 12-UQFN-HL pinout fit the board. RT6318CGQUF vs TPS568230RJER selection depends on integrated LDO need, input range, output current, package, and sourcing plan.

Quality

RT6318CGQUF 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

RT6318CGQUF 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 RT6318B/RT6318C family is a Richtek synchronous buck converter family integrating a high-current 23V step-down converter and an auxiliary LDO for compact local power supplies.

FAQ

What is RT6318CGQUF used for?

RT6318CGQUF is used for Richtek multi-rail power management in systems that need compact switching and auxiliary regulator functions.

Where can I find the RT6318CGQUF datasheet download?

The datasheet is available from Richtek or authorized distributor documentation.

What should be considered in RT6318CGQUF 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 RT6318CGQUF equivalent solutions?

Common candidates include RT6310CGQUF and TPS568230RJER depending on rail count, current, package, and system architecture.