Renesas RTKA211233DE0000BU

Overview

RTKA211233DE0000BU from Renesas Electronics is an evaluation board for the RAA211233 24V, 3A synchronous buck regulator with constant-on-time (COT) current-mode control, configured for 3.3V output, 1.4MHz switching frequency, and 4.5–24V input range. It integrates test points, jumpers for EN/UVLO/soft-start configuration, and supports full-feature evaluation including PFM mode operation under light load.

For engineers reviewing the RTKA211233DE0000BU datasheet, RTKA211233DE0000BU pinout, RTKA211233DE0000BU application, or RTKA211233DE0000BU equivalent, this board enables rapid validation of efficiency, load/transient response, startup/shutdown behavior, and VOUT programmability across industrial, automotive, and embedded power supply designs.

Technical Context

The RTKA211233DE0000BU implements a fixed 3.3V output configuration using R5 = 45.3kΩ and R6 = 10kΩ feedback divider, targeting the RAA211233's 0.6V reference with ±2% tolerance. It uses a 1.5µH inductor (Wurth 74438356015), 10µF ×2 input capacitors, and 6.8µF ×3 ceramic output capacitors to meet COT stability requirements at 1.4MHz.

Board-level protections include VIN UVLO (default 4.3V with 400mV hysteresis), thermal shutdown (OTP), output undervoltage (UVP) with hiccup mode, and low-side overcurrent (LSOC) limit - all inherited from the RAA211233 IC and verified via test points TP1–TP8 and jumper JP1 control.

Key Specifications

Availability

RTKA211233DE0000BU is available at Aetrix Electronics and suitable for industrial power supply validation, automotive body electronics prototyping, and embedded system DC-DC design requiring stable component supply, fast turnaround evaluation, and production-ready layout reference.

Supply support for RTKA211233DE0000BU 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 delivering microcontrollers, analog, power, and SoC solutions for automotive, industrial, infrastructure, and IoT applications.

The RTKA211233DE0000BU belongs to Renesas' power management evaluation platform family, designed to accelerate adoption of integrated buck regulators like the RAA211233 in space-constrained, high-efficiency 24V-input systems.

FAQ

What is the primary function of the RTKA211233DE0000BU?

The RTKA211233DE0000BU is an evaluation board specifically built to characterize and prototype applications using the RAA211233 3A synchronous buck regulator. It provides preconfigured 3.3V output, accessible test points (TP1–TP8), configurable enable/UVLO (JP1), and validated layout - enabling engineers to verify efficiency, transient response, startup behavior, and protection features without designing a custom PCB. The RTKA211233DE0000BU itself contains no active IC beyond the RAA211233 device it hosts.

Can the RTKA211233DE0000BU be used to evaluate output voltages other than 3.3V?

Yes - the RTKA211233DE0000BU supports VOUT programming by replacing feedback resistors R5 and R6 per the equation VOUT = 0.6V × (1 + R5/R6). The board includes solder pads and documentation (Equation 2) for reconfiguration. However, inductors and output capacitors may require adjustment for stability and ripple performance at significantly different voltages or load conditions. The RTKA211233DE0000BU remains the reference platform for such modifications.

Does the RTKA211233DE0000BU include onboard current sensing or telemetry?

No - the RTKA211233DE0000BU does not integrate current-sense amplifiers, digital telemetry interfaces, or PMBus/I²C. It relies on external equipment (e.g., electronic load, oscilloscope current probe) for load-current measurement and monitoring. All regulation, protection, and control functions are implemented by the RAA211233 IC itself; the RTKA211233DE0000BU provides physical access to key nodes (SW, FB, EN, VOUT) but no added signal conditioning or communication layers.

What is the role of JP1 on the RTKA211233DE0000BU?

JP1 is a 3-pin jumper that configures the EN (enable) input of the RAA211233 IC. With pins 2–3 shorted, EN connects to VIN via 0Ω resistor R1 (default enable). With pins 1–2 shorted, EN grounds and disables the regulator. Leaving pins open allows external logic control. JP1 also enables optional VIN UVLO programming by selecting R1 value per Equation 1 - making JP1 central to both basic operation and protection customization on the RTKA211233DE0000BU.

Is the RTKA211233DE0000BU RoHS-compliant and suitable for automotive-grade testing?

Yes - the RTKA211233DE0000BU evaluation board complies with RoHS directives and supports operation across -40°C to +125°C, matching the RAA211233 IC's automotive-grade temperature rating. While the board itself is not AEC-Q200 certified, its component selection (e.g., Wurth inductor, Murata/Taiyo Yuden capacitors) and thermal design align with automotive power supply development practices. It is explicitly recommended for evaluating RAA211233 in automotive body electronics and infotainment subsystems.