Renesas RTKA211835DE0010BU

Overview

RTKA211835DE0010BU from Renesas Electronics is an evaluation board designed to demonstrate and rapidly assess the RAA211835 HTSSOP-packaged asynchronous buck regulator, supporting 4.5V–75V input, delivering 3.3V/3A output with programmable switching frequency and premium line/load regulation performance in industrial power supply validation.

For engineers reviewing the RTKA211835DE0010BU datasheet, RTKA211835DE0010BU application, RTKA211835DE0010BU setup, or RTKA211835DE0010BU reference design, this board enables fast functional verification, layout benchmarking, and efficiency/load transient characterization of the RAA211835 DC/DC converter under real-world input voltage and load conditions.

Technical Context

The RTKA211835DE0010BU implements a fixed 3.3V output configuration using R9 (62 kΩ) and R10 (20 kΩ) feedback resistors per Equation 1, with default EN tied to VIN via JP1 for immediate operation. It integrates the RAA211835GSP IC featuring a 200 mΩ high-side MOSFET and supports external BST capacitor (CBOOT), SS pin for soft-start control, and PG signal for power-good monitoring.

This board operates across the full 4.5V–75V input range and delivers up to 3 A continuous output current. Performance graphs confirm <±1.5% load regulation from 0–3 A and >85% peak efficiency at 24 V_IN/2 A, validated with 6.8 µH power inductor (Wurth 74439346068) and 3×22 µF X7R ceramic output capacitors.

Key Specifications

Availability

RTKA211835DE0010BU is available at Aetrix Electronics and suitable for industrial power supply validation, automotive subsystem testing, and high-voltage DC/DC reference design requiring stable component supply and documented layout practices.

Supply support for RTKA211835DE0010BU 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 infrastructure markets.

The RTKA211835DE0010BU belongs to Renesas' RAA211835 evaluation platform series, developed specifically to accelerate adoption of high-input-voltage buck regulators in ruggedized power systems where reliability across wide VIN ranges is critical.

FAQ

What is the primary function of the RTKA211835DE0010BU evaluation board?

The RTKA211835DE0010BU evaluation board is a ready-to-use hardware platform that demonstrates and validates the operational performance of the RAA211835 asynchronous buck regulator IC. It enables engineers to verify startup behavior, load regulation, efficiency, and transient response without designing a custom PCB. The board ships with all key components populated-including the RAA211835GSP#HA0 IC, 6.8 µH inductor, and 3×22 µF output capacitors-making RTKA211835DE0010BU ideal for rapid prototyping and pre-compliance testing.

Does the RTKA211835DE0010BU support adjustable output voltage?

Yes, the RTKA211835DE0010BU supports adjustable output voltage via the feedback resistor divider network (R9 and R10). By default, it is configured for 3.3 V using a 62 kΩ (R9) and 20 kΩ (R10) combination per Equation 1 in the manual. Users can replace R9 to set other output voltages while maintaining the 0.8 V reference at the FB pin. The board's schematic and Bill of Materials explicitly identify R9 and R10 as configurable, confirming RTKA211835DE0010BU's flexibility for non-standard rail generation.

What input voltage range does the RTKA211835DE0010BU support?

The RTKA211835DE0010BU supports an input voltage range of 4.5 V to 75 V, matching the full operating range of the underlying RAA211835 IC. This is confirmed in the Evaluation Board Manual (R16UZ0059EU0100, p.3) and validated across multiple efficiency and load regulation graphs (pp.9–10) showing stable operation from 5 V_IN up to 72 V_IN. The board uses 100 V-rated input and output capacitors (e.g., Vishay MAL214699904E3, TDK CNA6P1X7R2A475K250AE), ensuring safe margin for 75 V_IN transients in RTKA211835DE0010BU applications.

How is the RTKA211835DE0010BU powered and enabled?

The RTKA211835DE0010BU is powered through screw terminals T1 (VIN) and T2 (GND), and enabled by default via jumper JP1, which shorts VIN to the EN pin. This configuration allows immediate startup upon applying input voltage-no external enable signal required. The manual (p.3) specifies this as the standard setup step, and the schematic (p.5) confirms JP1 connects VIN directly to EN. For controlled sequencing, users can remove JP1 and drive EN independently using an external logic signal, preserving full functionality of RTKA211835DE0010BU's enable feature.

Which test points are provided on the RTKA211835DE0010BU for debugging?

The RTKA211835DE0010BU provides six labeled test points: TP1 (VOUT), TP2 (FB), TP3 (EN), TP4 (PG), TP5 (SS), and TP6 (BST), plus J1 for the SW node. These are documented in the schematic (p.5) and silkscreen (p.7). Each serves a distinct debug purpose: TP1 monitors regulated output stability; TP2 verifies feedback loop integrity; TP3 and TP4 validate enable timing and power-good assertion; TP5 observes soft-start ramp; TP6 checks bootstrap capacitor charging; and J1 captures high-frequency switch-node waveforms. This comprehensive access makes RTKA211835DE0010BU highly effective for root-cause analysis of regulation or noise issues.