Renesas RTKA223012DR0050BU

Overview

RTKA223012DR0050BU from Renesas Electronics is a demonstration board featuring the RAA223012 700V buck/buck-boost regulator in SOIC-8 package, designed for universal AC input (85–265VAC) to 5V or –5V DC conversion at up to 150mA output current. It supports jumper-configurable topology, integrates overcurrent, brownout, and over-temperature protection, and achieves >62.5% efficiency at full load in buck mode.

For engineers reviewing the RTKA223012DR0050BU datasheet, RTKA223012DR0050BU pinout, RTKA223012DR0050BU application, or RTKA223012DR0050BU equivalent, this board serves as a pre-compliant reference design for low-cost, EMI-optimized AC/DC power supplies targeting smart home sensors, industrial IoT nodes, and auxiliary power rails requiring <10mW no-load consumption.

Technical Context

The RTKA223012DR0050BU implements high-side floating-switching architecture using the RAA223012 IC, enabling direct connection to rectified high-voltage DC bus without isolation transformers. Its JP1 jumper selects between buck (pins 1–2) and buck-boost (pins 2–3) operation while preserving output polarity.

Input filtering uses C1/L1/C2 to buffer energy and suppress conducted EMI; FR fusible resistor provides inrush limiting and surge energy absorption with C1/C2. Feedback network (RFB1/RFB2/CFB1/CFB2) sets output voltage and stabilizes regulation across 10–100% load range with ±3% deviation.

Key Specifications

Availability

RTKA223012DR0050BU is available at Aetrix Electronics and suitable for smart home sensor hubs, industrial IoT edge nodes, and auxiliary power rails in medical diagnostic equipment requiring stable component supply, rapid prototyping validation, and pre-verified EMI performance.

Supply support for RTKA223012DR0050BU 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 is a global semiconductor leader delivering microcontrollers, analog, power, and SoC solutions for automotive, industrial, infrastructure, and IoT applications with emphasis on reliability and system-level integration.

The RAA223012 product line targets cost-sensitive, non-isolated AC/DC conversion in ultra-low-power applications-designed specifically to replace linear regulators and discrete flyback solutions in sub-1W auxiliary supplies.

FAQ

What is the primary function of the RTKA223012DR0050BU?

The RTKA223012DR0050BU is a Renesas demonstration board that implements the RAA223012 700V buck/buck-boost regulator in SOIC-8 packaging. It converts universal AC input (85–265VAC) to regulated 5V or –5V DC output at up to 150mA. Its purpose is to accelerate development of compact, EMI-compliant, low-noise auxiliary power supplies for embedded systems where transformerless design is preferred.

How does the RTKA223012DR0050BU differ from the RTKA223012DR0060BU?

The RTKA223012DR0050BU uses the RAA223012 in SOIC-8 package (RAA2230124GSP#AA0), while RTKA223012DR0060BU uses the same IC in SOT-23-5 package (RAA2230124GP3#AA0). The SOIC-8 version accommodates higher power dissipation and eases thermal layout on the demo board; both share identical control architecture, protection features, and jumper-based topology selection.

Can the RTKA223012DR0050BU generate negative output voltage?

Yes-the RTKA223012DR0050BU can be configured for –5VDC output by setting JP1 to pins 2 and 3 (buck-boost mode). This configuration maintains the same output polarity convention as the 5V buck mode, eliminating need for external inverting circuitry. The board's schematic and layout are optimized for stable negative rail generation without additional components.

What protection features are implemented on the RTKA223012DR0050BU?

The RTKA223012DR0050BU integrates overcurrent protection (OCP), short-circuit protection (SCP), input brownout detection, and over-temperature shutdown-all handled internally by the RAA223012 IC. External FR fusible resistor adds input overcurrent and inrush limiting. These protections activate without firmware or external supervision, ensuring fail-safe behavior during abnormal line or load conditions.

Is the RTKA223012DR0050BU compliant with international EMI standards?

Yes-the RTKA223012DR0050BU is pre-compliant with EN55022/CISPR22 Class B conducted and radiated emissions requirements and passes the 1.5kV surge test per IEC61000-4-5. These validations were performed on the exact board layout and component set shipped as RTKA223012DR0050BU, reducing risk in final product certification.