Renesas EL7532EVAL1Z

Overview

EL7532EVAL1Z from Renesas Electronics is an evaluation board designed to demonstrate the EL7532IY 2A synchronous step-down PWM regulator in MSOP-10 packaging. It supports adjustable output voltage (default 1.8V), chip enable control, and RSI/POR functionality with 100ms reset timing. The board occupies less than 0.18 in² PCB area with all components on one side and operates from a single input supply.

For engineers reviewing the EL7532EVAL1Z datasheet, EL7532EVAL1Z pinout, EL7532EVAL1Z application, or EL7532EVAL1Z equivalent, this board enables rapid validation of power sequencing, load transient response, thermal performance, and Power-Good signal timing for compact DC/DC converter designs.

Technical Context

The EL7532EVAL1Z implements the EL7532IY IC's full feature set-including internal compensation, SYNC input for frequency synchronization, EN-controlled shutdown (<1 µA quiescent current), and open-collector POR/PG output with 100ms delay. It uses a 1.8 µH power inductor and dual 10 µF MLCC output capacitors to support stable 2A continuous output at 1.8V.

Board-level design integrates SGND and PGND separation, LX routing optimized for low-inductance switching node, and configurable RSI/POR pull-up (R4) and enable (R5) networks. All passive components are surface-mount in 0603/0402/1206 packages, aligned with the target application's space-constrained industrial and embedded requirements.

Key Specifications

Availability

EL7532EVAL1Z is available at Aetrix Electronics and suitable for power management validation, DC/DC converter reference design development, and embedded system bring-up requiring stable component supply and documented test configurations.

Supply support for EL7532EVAL1Z 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 Japan, specializing in microcontrollers, analog power devices, and SoC solutions for industrial, automotive, and infrastructure markets.

The EL7532EVAL1Z belongs to Renesas' legacy Intersil power management evaluation platform family, developed to accelerate adoption of high-efficiency, space-optimized DC/DC regulators for portable and space-constrained applications.

FAQ

What is the primary function of the EL7532EVAL1Z evaluation board?

The EL7532EVAL1Z evaluation board is designed exclusively to evaluate the EL7532IY 2A synchronous step-down PWM regulator. It provides a fully assembled, tested platform with default 1.8V output, enable control, and configurable RSI/POR functionality-enabling engineers to validate efficiency, transient response, thermal behavior, and Power-Good timing without custom PCB development. The EL7532EVAL1Z supports rapid prototyping of compact DC/DC solutions.

Can the output voltage of the EL7532EVAL1Z be adjusted, and how?

Yes, the output voltage of the EL7532EVAL1Z can be adjusted using the R1–R2 feedback divider network per the formula VO = 0.8 × (1 + R2/R1). The board ships with R1 = 124 kΩ and R2 = 100 kΩ for 1.8V output; replacing either resistor allows setting any output between ~0.8V and 5.5V within the EL7532IY's regulation range. The EL7532EVAL1Z schematic and bill of materials provide exact placement and pad locations for modification.

Does the EL7532EVAL1Z support synchronization with an external clock?

Yes, the EL7532EVAL1Z exposes the SYNC pin of the EL7532IY IC via header J3 (labeled "SYNC/RSI"). This allows connection to an external clock source to synchronize switching frequency and reduce EMI in multi-rail systems. The EL7532EVAL1Z layout maintains low-noise routing for the SYNC trace and includes series resistance (R6) for optional filtering, as specified in the EL7532IY datasheet.

How is the Power-On-Reset (POR) or Power-Good (PG) signal configured on the EL7532EVAL1Z?

The EL7532EVAL1Z implements the EL7532IY's open-collector POR/PG output (pin 8) with a 100 ms delay. When R4 (100 kΩ) is installed and RSI is grounded, the output functions as a delayed Power-Good signal. If RSI is driven externally, it triggers a 100 ms reset pulse while maintaining output regulation. The EL7532EVAL1Z user manual (TB445) details jumper and resistor configurations for both modes.

Is the EL7532EVAL1Z compatible with the EL7535CY shown in the schematic?

No, the EL7532EVAL1Z is specifically designed for the EL7532IY regulator. While the schematic shows EL7535CY in one diagram for illustrative comparison, the bill of materials, layout, and component values (e.g., R1=124kΩ, L1=1.8µH) are optimized for EL7532IY's electrical characteristics and pinout. Using EL7535CY would require redesign due to differences in internal compensation, current limit, and thermal performance. The EL7532EVAL1Z is not rated for EL7535CY operation.