Renesas RTKA211650DE0000BU

Overview

RTKA211650DE0000BU from Renesas Electronics is an evaluation board designed specifically for the RAA211650 60V, 5A synchronous buck regulator IC. It provides a fully configured platform with 3.3V output, internal 500kHz switching frequency, 2ms soft-start, and -40°C to +125°C operating range - enabling rapid validation of high-voltage DC/DC conversion in industrial power supplies and automotive subsystems.

For engineers reviewing the RTKA211650DE0000BU datasheet, RTKA211650DE0000BU pinout, RTKA211650DE0000BU application, or RTKA211650DE0000BU equivalent, this board delivers ready-to-use test points (J1–J7), configurable EN/SS/DELAY/RT/EBIAS options, and full access to PHASE, BOOT, COMP, FB, and SYNC/MODE signals for dynamic performance characterization and layout verification.

Technical Context

The RTKA211650DE0000BU implements the RAA211650 buck regulator in a fixed 3.3V output configuration using internal feedback resistors, with PVIN support from 4.5V to 60V and continuous 5A load capability. Its default 500kHz switching frequency is set by an internal RT network (R9 = 30.1kΩ), and it uses internal compensation with C9/C7 removed and R12 = 0Ω.

This board integrates design-validated passive components: 3.3µH shielded inductor (Wurth 744325330), 80µF total output capacitance (12×10µF X7S), and optimized AVCC/PVCC decoupling (1µF + 1Ω RC filter). All critical nodes - PHASE, BOOT, and FB - follow Renesas' four-layer PCB layout guidelines with thermal vias under U1's exposed pad.

Key Specifications

Availability

RTKA211650DE0000BU is available at Aetrix Electronics and suitable for industrial power supply validation, automotive ADAS subsystem prototyping, and high-reliability 48V-to-3.3V point-of-load design requiring stable component supply and fast time-to-test.

Supply support for RTKA211650DE0000BU 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 RTKA211650DE0000BU belongs to Renesas' RAA211650 evaluation board family, engineered to accelerate development of robust, high-efficiency 60V-input buck converters for harsh-environment power systems.

FAQ

What is the primary function of the RTKA211650DE0000BU evaluation board?

The RTKA211650DE0000BU evaluation board is a dedicated hardware platform for evaluating the RAA211650 60V, 5A synchronous buck regulator IC. It enables engineers to validate performance - including efficiency, transient response, thermal behavior, and feature configurability - without designing a custom PCB. The board ships pre-configured for 3.3V output at 500kHz and supports full pin-level access to all control and monitoring signals of the RTKA211650DE0000BU target device.

Does the RTKA211650DE0000BU support output voltages other than 3.3V?

Yes, the RTKA211650DE0000BU supports programmable output voltages beyond 3.3V. While it ships with internal feedback enabled for 3.3V (via R24 = 0Ω), users can reconfigure it for other outputs by populating external feedback resistors R21 and R23 per Equation 4 in the manual. Renesas recommends keeping R21 at 20kΩ and adjusting R23 accordingly - for example, 62kΩ yields ~3.3V, while other values scale linearly with VOUT = 0.8 × (1 + R23/R21).

How is the switching frequency configured on the RTKA211650DE0000BU?

The RTKA211650DE0000BU is factory-set to 500kHz using internal RT configuration (R9 = 30.1kΩ). To change frequency, users remove R7 and install R6 per Equation 3: R6 (kΩ) = 120258 / fSW (kHz). This allows adjustment across the full RAA211650 range of 200kHz to 2.5MHz. Alternatively, the board supports external clock synchronization via J7 (EXT CLK), where the internal divider locks to half the input frequency if it exceeds 110% of the RT-set value.

Can the RTKA211650DE0000BU be used for spread spectrum EMI reduction testing?

Yes, the RTKA211650DE0000BU supports spread spectrum operation. By default, spread spectrum is enabled using R4 = 0Ω and leaving jumper J7 open, while R5 remains unpopulated. To disable it, users install a 0Ω resistor at R5 or short J7. This configuration directly controls the RAA211650's internal dithering engine, allowing comparative EMI measurements with and without frequency modulation - critical for meeting CISPR-25 Class 5 requirements in automotive applications.

What thermal design features are implemented on the RTKA211650DE0000BU board?

The RTKA211650DE0000BU incorporates Renesas' recommended thermal layout: a four-layer PCB with 2oz outer copper and 1oz inner layers, plus dense thermal vias under the RAA211650's exposed pad connected to internal GND planes. The board uses a 3.3µH shielded inductor (Wurth 744325330) rated for 12A saturation current and low core loss, and validates thermal performance up to +125°C ambient - matching the RAA211650 IC's specified junction temperature limit and ensuring reliability in enclosed industrial enclosures.