Renesas ISL8022EVAL1Z

Overview

The ISL8022EVAL1Z from Renesas Electronics is an evaluation board designed to demonstrate the performance of the ISL8022 dual synchronous buck regulator in point-of-load applications. It delivers preset 2.5V/1.8V outputs from a 2.8V–5.5V input, supports 2.25MHz switching, achieves up to 97% efficiency, and occupies under 1.8 cm² PCB area using a compact 4mm×3mm DFN-packaged ISL8022IRZ controller.

For engineers reviewing the ISL8022EVAL1Z datasheet, ISL8022EVAL1Z pinout, ISL8022EVAL1Z application, or ISL8022EVAL1Z equivalent, this page provides verified board-level specifications, test setup guidance, output voltage adjustment methodology, mode control logic (PFM/PWM/SYNC), and practical design considerations for PoL DC-DC validation.

Technical Context

The ISL8022EVAL1Z implements two independent high-efficiency buck channels-Channel 1 rated at 2A and Channel 2 at 1.7A-with 180° out-of-phase operation to reduce input ripple. It uses internal current-mode compensation and peak current limiting with hiccup-mode short-circuit protection.

Each channel features programmable soft-start (5ms), power-good monitoring with 1ms delay, pre-biased start-up capability, and selectable PFM/PWM modes via the SYNC pin. Output voltages are adjustable from 0.6V to 3.3V using external resistor dividers (e.g., R2/R5 and R3/R6), with typical feedback resistors ranging from 0Ω to 750kΩ.

Key Specifications

Availability

The ISL8022EVAL1Z is available at Aetrix Electronics and suitable for point-of-load DC-DC validation, industrial embedded power sequencing, and automotive infotainment subsystem testing requiring stable component supply and rapid prototyping support.

Supply support for ISL8022EVAL1Z 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, and IoT applications, with strong heritage in high-efficiency power management.

The ISL8022EVAL1Z belongs to Renesas' precision DC-DC evaluation platform family, engineered specifically to accelerate adoption of low-quiescent-current, high-frequency synchronous buck regulators in space-constrained PoL designs.

FAQ

What is the primary function of the ISL8022EVAL1Z?

The ISL8022EVAL1Z is an evaluation board-not a semiconductor device-that demonstrates the ISL8022 dual synchronous buck regulator's performance. It provides validated layout, preset 2.5V/1.8V outputs, and accessible test points for measuring efficiency, transient response, and stability under real-world load conditions. The ISL8022EVAL1Z enables rapid characterization before integrating the ISL8022IRZ into custom designs.

Can the output voltages on the ISL8022EVAL1Z be changed?

Yes, both VOUT1 and VOUT2 on the ISL8022EVAL1Z are adjustable from 0.6V to 3.3V using external feedback resistors (R2/R5 and R3/R6). For example, replacing R2 (316kΩ) and R3 (100kΩ) allows recalculating the divider per Equation 1 in AN1554. The ISL8022EVAL1Z schematic and bill of materials confirm these resistors are populated and modifiable for custom voltage settings.

How do I configure PFM vs. PWM mode on the ISL8022EVAL1Z?

Mode selection on the ISL8022EVAL1Z is controlled via the SYNC pin: connect SYNC to VIN or logic high for PFM mode (ultra-low IQ); tie SYNC to ground or logic low for forced PWM mode (fixed frequency); or drive SYNC with an external clock for synchronization. SW1 toggle switch (positions 1/PWM and 3/PFM) provides hardware control per the Quick Setup Guide in AN1554 Rev 1.00.

Does the ISL8022EVAL1Z include thermal management provisions?

Yes, the ISL8022EVAL1Z incorporates thermal design best practices: the ISL8022IRZ is mounted on a 4mm×3mm DFN package with exposed pad (EP) soldered to PGND planes across multiple layers (see Figures 1–5), and the board layout allocates copper area beneath L1/L2 and U1 for heat spreading. AN1554 confirms over-temperature protection is implemented in the ISL8022IC, which activates on the ISL8022EVAL1Z.

What test equipment is required to evaluate the ISL8022EVAL1Z?

Per AN1554 Rev 1.00, recommended equipment includes: a 0–10V/3A power supply (or 5V battery) for VIN2, electronic loads capable of sinking ≥3A total, a 100MHz quad-trace oscilloscope for waveform capture, digital multimeters for DC accuracy, and a signal generator for SYNC testing. Test points LX1, LX2, VOUT1_S, and VOUT2_S are provided for non-invasive probing without soldering.