Renesas EL7534EVAL1

Overview

EL7534EVAL1 from Renesas Electronics is an evaluation board designed to demonstrate and validate the EL7532IY synchronous step-down DC/DC converter - a 2A, high-efficiency PWM regulator in MSOP-10 packaging with internal compensation, supporting adjustable 1.8V output and integrated RSI/POR functionality.

For engineers reviewing the EL7534EVAL1 datasheet, EL7534EVAL1 pinout, EL7534EVAL1 application, or EL7534EVAL1 equivalent, this board enables rapid prototyping of compact power supply designs requiring <0.18 in² PCB area, precise output voltage tuning, enable control, and Power-On-Reset signaling in space-constrained embedded systems.

Technical Context

The EL7534EVAL1 implements the EL7532IY IC in a fully assembled, tested layout optimized for evaluation of its 2A synchronous buck conversion performance. It supports VIN input range of 2.7V–5.5V and delivers regulated VO = 1.8V (adjustable via R1/R2 resistor divider), with EN pin control and open-collector POR/PG output active for 100ms after regulation is achieved.

Board-level features include SYNC/RSI pin access for external reset synchronization, SGND/PGND separation for noise-sensitive layout validation, and all passive components (C1/C2 = 10µF X7R MLCCs, L1 = 1.8µH inductor) placed on one side - confirming the reference design's single-sided, minimal-footprint implementation.

Key Specifications

Availability

EL7534EVAL1 is available at Aetrix Electronics and suitable for power supply validation, DC/DC converter qualification, and embedded system bring-up requiring stable component supply, fast-turn evaluation hardware, and documented reference schematics.

Supply support for EL7534EVAL1 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 manufacturer delivering microcontrollers, analog, power, and SoC solutions for automotive, industrial, and enterprise applications.

The EL7534EVAL1 belongs to Renesas' legacy Intersil power management evaluation platform, specifically developed to accelerate adoption of compact, high-efficiency synchronous buck regulators like the EL7532IY in portable and space-limited electronics.

FAQ

What is the primary function of the EL7534EVAL1?

The EL7534EVAL1 is a dedicated evaluation board for the EL7532IY synchronous step-down DC/DC converter. It provides a fully assembled, tested platform to verify electrical performance-including output regulation, enable control, and POR timing-under real-world conditions without custom PCB development. The EL7534EVAL1 allows immediate validation of the EL7532IY's 2A capability, 1.8V output, and compact layout claims.

Does the EL7534EVAL1 support adjustable output voltage?

Yes, the EL7534EVAL1 supports output voltage adjustment via the R1/R2 resistor divider network, following the formula VO = 0.8V × (1 + R2/R1). Though factory-configured for 1.8V, users can replace R1 (80.6kΩ) and R2 (100kΩ) to set other values within the EL7532IY's regulation range. The EL7534EVAL1 schematic and bill of materials explicitly document this tuning method.

How is the Power-On-Reset (POR) signal implemented on the EL7534EVAL1?

The EL7534EVAL1 implements POR using the EL7532IY's open-collector PG/POR pin, configured with pull-up resistor R4 (100kΩ) to generate a 100ms-delayed "Power Good" signal after output regulation is achieved. The RSI pin is accessible for external reset injection, and the EL7534EVAL1 user manual confirms identical 100ms low pulse duration for both POR and RSI-triggered events.

Can the EL7534EVAL1 be used to evaluate the EL7535CY?

No - the EL7534EVAL1 is specifically designed for the EL7532IY, as confirmed by the BOM listing U1 = EL7532IY (MSOP-10) and matching pinout (SGND, PGND, LX, VIN, VDD, FB, VO, POR, EN, RSI). While the EL7535CY appears in a schematic footnote, it is not populated on the EL7534EVAL1 board and has different pin assignments and functional specifications.

What are the key layout features validated by the EL7534EVAL1?

The EL7534EVAL1 validates critical layout practices for high-current buck converters: separation of SGND (signal ground) and PGND (power ground), single-sided component placement, thermal pad exposure for the MSOP-10 U1, and optimized high-frequency loop routing for LX/VIN/PGND. Its documented 0.18 in² footprint demonstrates how the EL7534EVAL1 achieves minimal area without compromising stability or EMI performance.