Renesas RTKA211250DE0010BU

Overview

RTKA211250DE0010BU from Renesas Electronics is an evaluation board designed to validate the RAA211250 HTSSOP synchronous buck regulator, supporting 4.5V–30V input, delivering 3.3V/5A output with integrated 90mΩ high-side and 45mΩ low-side MOSFETs, and enabling programmable switching frequency in industrial power supply designs.

For engineers reviewing the RTKA211250DE0010BU datasheet, RTKA211250DE0010BU application, or RTKA211250DE0010BU equivalent, this board provides verified layout guidance, performance graphs (efficiency vs. load, ripple, enable timing), and configurable feedback resistors for rapid prototyping of 3.3V point-of-load converters.

Technical Context

The RTKA211250DE0010BU implements a fixed 3.3V output configuration using R9 (62kΩ) and R10 (20kΩ) per Equation 1, with internal soft-start and power-good signaling. It supports VIN up to 30V and delivers up to 5A continuous output current with measured efficiency exceeding 92% at 24V_IN/3.3V_OUT/3A.

Board-level design includes a 3.3µH power inductor (Wurth 74439344033), three 47µF output capacitors, and dedicated test points (TP1–TP4) for VOUT, SW, EN, and PG monitoring - all aligned with RAA211250 Datasheet layout guidelines.

Key Specifications

Availability

RTKA211250DE0010BU is available at Aetrix Electronics and suitable for industrial power supply validation, embedded system PoL development, and automotive infotainment subsystem testing requiring stable component supply and reference-grade layout fidelity.

Supply support for RTKA211250DE0010BU includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Renesas Electronics Corporation is a global semiconductor leader headquartered in Tokyo, Japan, specializing in microcontrollers, analog power devices, and embedded solutions for automotive, industrial, and IoT markets.

The RTKA211250DE0010BU belongs to Renesas' RAA211250 evaluation platform family, engineered to accelerate adoption of high-efficiency, integrated synchronous buck regulators in space-constrained 3.3V/5A applications.

FAQ

What is the primary function of the RTKA211250DE0010BU evaluation board?

The RTKA211250DE0010BU evaluation board is a fully assembled hardware platform designed exclusively to evaluate the RAA211250GSP#HA0 synchronous buck regulator. It provides a validated reference design for 3.3V/5A conversion from 4.5V–30V input, including thermal management, EMI-optimized layout, and real-world performance data such as efficiency curves and ripple measurements. Engineers use the RTKA211250DE0010BU to verify system integration before final PCB spin.

Can the output voltage of the RTKA211250DE0010BU be adjusted, and how?

Yes, the RTKA211250DE0010BU output voltage is adjustable via the feedback resistor divider (R9 and R10). By default, R9 = 62kΩ and R10 = 20kΩ set V_OUT = 3.3V per Equation 1 in the manual. Replacing either resistor allows reconfiguration across the RAA211250's supported range (0.8V to VIN × 0.9), maintaining regulation accuracy and stability. The RTKA211250DE0010BU schematic and Bill of Materials confirm these components are populated and accessible.

Does the RTKA211250DE0010BU include thermal performance data?

Yes, the RTKA211250DE0010BU Evaluation Board Manual includes thermal performance evidence through efficiency vs. load graphs (Figure 9) and load regulation plots (Figure 10) measured at +25°C ambient. While explicit junction temperature or thermal resistance values are not tabulated, the board's copper pour, EPAD grounding, and component placement follow RAA211250 Datasheet thermal guidelines - enabling users to extrapolate thermal behavior under their specific airflow and load conditions using the RTKA211250DE0010BU as a baseline.

What external components are required to operate the RTKA211250DE0010BU?

No external components are required to operate the RTKA211250DE0010BU. It ships fully populated with all critical passives: input/output capacitors (including 3×47µF output), 3.3µH power inductor, feedback resistors (R9/R10), and jumpers (JP1). Users need only apply DC input (4.5V–30V) to terminals T1/T2, connect load to T3/T4, and monitor outputs via test points - as confirmed in Section 1.2 "Setup and Configuration" of the R16UZ0038EU0101 manual.

Is the RTKA211250DE0010BU compatible with other RAA211xxx regulators?

No, the RTKA211250DE0010BU is specifically designed for the RAA211250GSP#HA0 (HTSSOP-16) variant and is not mechanically or electrically compatible with other RAA211xxx parts. Its schematic, layout, and BOM - including pin-specific routing for BST, SS, PG, and EBIAS - match only the RAA211250's 16-pin HTSSOP footprint and functional pinout. Substituting another RAA211xxx device on the RTKA211250DE0010BU would require redesign due to differing pin assignments and internal configurations.