Renesas RTKA211403DE0000BU

Overview

The RTKA211403DE0000BU from Renesas Electronics is an evaluation board designed exclusively for the RAA211403 3.3V, 300mA buck regulator IC. It supports input voltages from 7V to 40V DC, delivers regulated 3.3V output at up to 300mA continuous load, and incorporates test points (TP1–TP3), connectors (J1–J4), and a 15µH inductor for real-time performance validation in power-constrained industrial and automotive subsystems.

For engineers reviewing the RTKA211403DE0000BU datasheet, RTKA211403DE0000BU pinout, RTKA211403DE0000BU application, or RTKA211403DE0000BU equivalent, this board enables rapid characterization of quiescent current (4µA at 40V no-load switching), soft-start behavior (135µs no-load ramp), variable-frequency operation, and protection features including OCP, UVLO, OTP, and OVP - all under actual operating conditions.

Technical Context

This board implements the RAA211403 in its native TSOT23-5 package with fixed 3.3V output, pre-bias start-up capability, and external inductor-based frequency tuning (4.7µH–15µH). The design uses only four external components: input capacitor (10µF), output capacitor (22µF), Schottky diode (MBR1060HEWS), and 1MΩ EN pull-up resistor (R2).

It operates across –40°C to +125°C ambient, supports monotonic VOUT ramp-up, and provides direct access to critical nodes: VIN (J1), GND (J2/J4/TP1), VOUT (J3), SW (TP2), and EN (TP3). Switching frequency varies with load and input voltage - reaching ~1.2MHz at 24V/300mA with 15µH inductance per measured bench data.

Key Specifications

Availability

RTKA211403DE0000BU is available at Aetrix Electronics and suitable for industrial sensor nodes, automotive body control modules, and IoT edge devices requiring stable component supply, fast prototyping cycles, and verified low-IQ DC-DC performance.

Supply support for RTKA211403DE0000BU 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.

The RTKA211403DE0000BU belongs to Renesas' Power Management Evaluation Board family, engineered to accelerate adoption of ultra-low-IQ DC-DC regulators like the RAA211403 in energy-sensitive embedded systems.

FAQ

What is the primary function of the RTKA211403DE0000BU evaluation board?

The RTKA211403DE0000BU evaluation board is a dedicated hardware platform for evaluating the RAA211403 3.3V, 300mA buck regulator. It enables engineers to validate key performance metrics - including efficiency, quiescent current, soft-start timing, load/transient response, and protection behaviors - without designing a custom PCB. The board ships fully assembled with optimized layout and documented test points for immediate use with standard lab equipment.

Does the RTKA211403DE0000BU support adjustable output voltage?

No. The RTKA211403DE0000BU is configured specifically for the RAA211403's fixed 3.3V output version. The RAA211403 itself does not support adjustable output; it integrates internal feedback, so no external resistor divider is present or required on the RTKA211403DE0000BU board. Output voltage is factory-trimmed and cannot be modified via board-level components.

How do I enable or disable the RAA211403 using the RTKA211403DE0000BU board?

The RTKA211403DE0000BU board connects EN to VIN through a 1MΩ pull-up resistor (R2) by default, enabling the regulator automatically when input power is applied. To disable the device, remove R2 and drive the EN pin externally - for example, with a logic signal referenced to GND. The EN test point (TP3) allows probing of the enable node without soldering. Never leave EN floating.

What test equipment is recommended for characterizing the RTKA211403DE0000BU?

Renesas recommends a 40V/350mA+ DC power supply, an electronic load capable of sinking ≥350mA, and a 4-channel oscilloscope with voltage and current probes. Critical measurements include VOUT regulation (J3), switching node waveform (TP2), EN timing (TP3), and inductor current (using current probe or shunt). The board's test points and connector layout are optimized for these instruments.

Can the RTKA211403DE0000BU be used to evaluate different inductors or capacitors?

Yes. The RTKA211403DE0000BU supports inductor substitution (4.7µH–15µH range) to explore frequency trade-offs and efficiency vs. size. CIN and COUT footprints allow replacement of the default 10µF input and 22µF output capacitors. However, CIN2 and COUT2 positions are marked DNP (do not populate); only CIN1 and COUT1 are populated. Layout guidelines emphasize minimizing power loop area during any component change.