Richtek USA Inc. RT6256BGQUF

Overview

RT6256BGQUF from Richtek USA Inc. is an ACOT synchronous step-down converter designed to generate a high-current local rail from a wide intermediate input bus. The device supports 6A buck conversion, 4.5V to 23V input operation, fixed 3.3V buck output, and 3.3V / 100mA LDO, giving compact processor, memory, networking, and embedded boards an efficient regulator with integrated power-stage behavior.

As part of the Richtek RT6256B/C product family, RT6256BGQUF combines constant-on-time control, synchronous rectification, power-good monitoring, enable control, bootstrap drive support, compact 12-UQFN-HL 3mm x 3mm flip-chip package, and suffix-specific output behavior. For engineers reviewing the RT6256BGQUF datasheet, RT6256BGQUF pinout, RT6256BGQUF application, or RT6256BGQUF equivalent, this device is widely used in notebook power rails, embedded computing boards, networking equipment, industrial controllers, storage systems, and compact high-current point-of-load regulators.

Technical Context

In local power-tree designs, RT6256BGQUF operates as a synchronous buck converter that steps a 4.5V to 23V supply down to fixed 3.3V buck output. The 6A rating allows the regulator to feed dense digital loads such as processors, FPGA I/O banks, memory rails, or communication chipsets.

The ACOT control architecture improves transient response without requiring a complex compensation network. The integrated or companion LDO function provides 3.3v / 100ma ldo, while the PGOOD and EN pins help the host system sequence and monitor the regulated rail.

RT6256BGQUF is commonly selected for compact boards that need a 12-UQFN-HL 3mm x 3mm flip-chip package regulator, high current density, fast load-step behavior, simple external components, and a factory-defined output version rather than a large controller-plus-MOSFET implementation.

Key Specifications

Pinout & Package

The RT6256BGQUF pinout includes VIN, LX or SW switching pins, BOOT bootstrap drive, VOUT or feedback sensing, EN control, PGOOD monitor, VCC or LDO-related pins, AGND, PGND, and exposed thermal ground functions according to the RT6256B/C package option.

For PCB design, the VIN capacitor, high-current switch loop, inductor, and output capacitors should be kept compact. Feedback or output-sense routing should stay away from LX/SW copper, and the exposed pad should connect to low-impedance thermal ground.

Key Features

• 6A synchronous buck conversion supports high-current point-of-load rails.
• 4.5V to 23V input range fits notebook, adapter, industrial, and embedded buses.
• fixed 3.3V buck output reduces external voltage-setting work for fixed-output variants.
• ACOT control improves transient behavior with simple external compensation needs.
• Power-good and enable pins support sequencing and diagnostics.
• Compact 12-UQFN-HL 3mm x 3mm flip-chip package supports dense regulator placement.

Applications

Equivalent & Alternatives

When evaluating a RT6256BGQUF equivalent, engineers should compare input range, output-current rating, fixed or adjustable output behavior, LDO rail, ACOT control behavior, package, and pinout.

Compared with RT6258BGQUF, RT6256BGQUF should be selected when the Richtek RT6256B/C pinout, output option, and auxiliary LDO behavior match the existing PCB. RT6256BGQUF vs TPS566238RJER selection depends on current rating, input-voltage margin, package, fixed-output requirement, and compensation/control architecture.

Quality

RT6256BGQUF should be sourced as original Richtek components through traceable supply channels. Quality checks may include UQFN package inspection, top-mark validation, solderability testing, output-voltage confirmation, PGOOD behavior testing, and high-current thermal review.

Production validation should include startup behavior, load-transient response, line regulation, output ripple, thermal rise, short-circuit protection, and layout-sensitive switch-node ringing checks.

Availability

RT6256BGQUF available at Aetrix Electronics and is suitable for notebook, embedded computing, networking, industrial, storage, and compact point-of-load power 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 fixed-output suffix, package, reel quantity, lifecycle status, lead time, and sourcing continuity helps reduce procurement risk.

Manufacturer

Richtek Technology, operating as Richtek USA Inc. in distribution channels, is a power-management semiconductor manufacturer focused on DC-DC converters, linear regulators, battery-management ICs, LED drivers, USB power devices, and compact regulator solutions for computing, industrial, networking, consumer, and embedded electronics.

The Richtek RT6256B/C product family is a synchronous buck regulator series using ACOT control and compact QFN packaging for high-current point-of-load rails in computing, networking, and embedded power systems.

FAQ

What is RT6256BGQUF used for?

RT6256BGQUF is used for notebook rails, embedded computing boards, networking equipment, industrial controllers, and high-current point-of-load power conversion.

Where can I find the RT6256BGQUF datasheet download?

The RT6256BGQUF datasheet is available from Richtek or authorized distributor product documentation.

What output does RT6256BGQUF provide?

RT6256BGQUF provides fixed 3.3V buck output with 6A buck current capability and 3.3v / 100ma ldo.

What should be considered in RT6256BGQUF pinout design?

Designers should keep the VIN-to-switch-node loop compact, place the inductor and output capacitors close, route sense lines away from LX/SW noise, and connect the exposed pad to thermal ground.

What are common RT6256BGQUF equivalent solutions?

Common candidates include RT6258BGQUF and TPS566238RJER depending on current, fixed-output voltage, package, and pinout requirements.