Renesas RTKA211820DE0010BU

Overview

RTKA211820DE0010BU from Renesas Electronics is an evaluation board designed to demonstrate and rapidly assess the RAA211820 HTSSOP synchronous buck regulator, supporting 4.5V–75V input, delivering 3.3V/2A output with programmable switching frequency and premium line/load regulation performance in industrial power conversion applications.

For engineers reviewing the RTKA211820DE0010BU datasheet, RTKA211820DE0010BU pinout, RTKA211820DE0010BU application, or RTKA211820DE0010BU equivalent, this board enables fast validation of high-voltage DC/DC step-down operation, layout reference verification, and performance benchmarking under real load and thermal conditions.

Technical Context

The RTKA211820DE0010BU implements the RAA211820 (16-pin HTSSOP) IC with integrated 215mΩ/115mΩ high-side/low-side MOSFETs, fixed 3.3V output set by R9/R10 feedback network, and supports external frequency programming via FS pin. It operates across automotive-grade temperature range and includes PG (power good), SS (soft-start), and EBIAS bias supply functions.

This board provides direct access to key nodes - VIN, SW, FB, EN, PG, BST, VCC, and AGND - enabling oscilloscope-based waveform analysis of startup, shutdown, load transients, and ripple at no-load and full 2A load, per Figures 14–17 in the manual.

Key Specifications

Availability

RTKA211820DE0010BU is available at Aetrix Electronics and suitable for industrial power supply design, automotive subsystem evaluation, and high-voltage DC/DC prototyping requiring stable component supply and verified layout reference.

Supply support for RTKA211820DE0010BU 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 manufacturer headquartered in Tokyo, Japan, specializing in microcontrollers, analog power devices, and embedded solutions for automotive, industrial, and infrastructure markets.

The RTKA211820DE0010BU belongs to Renesas' Power Management Evaluation Board family, engineered to accelerate adoption of high-input-voltage buck regulators in harsh-environment applications where reliability, layout fidelity, and rapid functional validation are critical.

FAQ

What is the primary purpose of the RTKA211820DE0010BU?

The RTKA211820DE0010BU is a dedicated evaluation board for the RAA211820 synchronous buck regulator. Its purpose is to demonstrate operational behavior, validate performance metrics (efficiency, ripple, transient response), and serve as a PCB layout reference for system designers integrating the RAA211820GNP#HA0 into end equipment. The RTKA211820DE0010BU does not function as a standalone power module but as a test and development tool.

Does the RTKA211820DE0010BU support adjustable output voltage?

Yes, the RTKA211820DE0010BU supports adjustable output voltage via the R9/R10 resistor divider on the FB pin, per Equation 1 in the manual. By default, it delivers 3.3V using R9 = 62kΩ and R10 = 20kΩ. Changing either resistor allows setting other output voltages while maintaining proper feedback loop stability and sensing accuracy for the RAA211820 IC used on the RTKA211820DE0010BU.

Which IC is mounted on the RTKA211820DE0010BU board?

The RTKA211820DE0010BU board mounts the Renesas RAA211820GNP#HA0 - a 16-pin HTSSOP-packaged synchronous buck regulator with integrated high-side and low-side MOSFETs (215mΩ/115mΩ), programmable switching frequency, and support for 4.5V–75V input. This exact IC variant is specified in the Bill of Materials on page 6 of the RTKA211820DE0010BU Evaluation Board Manual.

Can the RTKA211820DE0010BU be used for thermal testing?

Yes, the RTKA211820DE0010BU supports thermal evaluation: its PCB layout includes exposed thermal pad (EPAD) connection for the RAA211820GNP#HA0, and the board uses a 10µH power inductor rated for 7.6A saturation current. Measured efficiency curves (Figure 10) and load regulation data (Figure 11) across –40°C to +85°C confirm suitability for thermal stress analysis when paired with appropriate heatsinking and airflow.

What are the required connections to operate the RTKA211820DE0010BU?

To operate the RTKA211820DE0010BU, connect DC input (4.5V–75V) to terminals T1 (VIN) and T2 (GND), and load to T3 (VOUT) and T4 (GND). JP1 must be populated to short VIN to EN for automatic startup. No additional configuration is needed - the RTKA211820DE0010BU powers up immediately upon valid input, delivering regulated 3.3V output with built-in soft-start and power-good signaling.