Renesas ISL9113AIRAZ-T

Overview

ISL9113AIRAZ-T from Intersil is an evaluation board designed specifically for the ISL9113A adjustable-output synchronous boost converter IC. It supports input voltages from 0.8V to 4.7V, delivers up to 500mA at 5V output from a 3V input, and features 1.8MHz switching frequency, 20µA quiescent current in Skip mode, and full fault protection including OVP, OTP, and short-circuit shutdown. The board enables rapid validation of USB-OTG and portable HDMI power architectures.

For engineers reviewing the ISL9113AIRAZ-T datasheet, ISL9113AIRAZ-T pinout, ISL9113AIRAZ-T application, or ISL9113AIRAZ-T equivalent, this evaluation board provides immediate hardware access to the ISL9113A's adjustable-output boost functionality, light-load efficiency optimization, output disconnect during shutdown, and thermal/overvoltage protection behavior under real-world load transients and battery-voltage droop conditions.

Technical Context

The ISL9113AIRAZ-T evaluation board implements the ISL9113A's peak-current-mode PWM control architecture with internal compensation, enabling stable regulation across 0.8–4.7V input and adjustable output (via FB divider). It validates the device's 1.3A peak switch current limit, 82–87.5% maximum duty cycle, and seamless transition between 1.8MHz PWM and pulse-skipping modes.

Board-level design reflects critical layout requirements: low-inductance power loops, SW-node isolation from FB trace, thermal pad vias to PGND, and placement of 4.7µF input/output ceramic capacitors adjacent to VBAT/VOUT pins - all essential to achieve >90% efficiency and meet EMI targets in space-constrained portable systems.

Key Specifications

Availability

ISL9113AIRAZ-T is available at Aetrix Electronics and suitable for USB-OTG power validation, portable HDMI source design, and battery-powered mobile internet device development requiring stable component supply and rapid prototyping support.

Supply support for ISL9113AIRAZ-T 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

Intersil Corporation is a leading provider of power management and precision analog solutions, now part of Renesas Electronics, with expertise in high-efficiency DC-DC conversion for portable and battery-operated systems.

The ISL9113A product line was engineered to deliver ultra-low-input-voltage boost capability for energy-constrained devices such as smartphones and tablets, emphasizing light-load efficiency, small solution size, and robust fault resilience without external compensation components.

FAQ

What is the primary purpose of the ISL9113AIRAZ-T evaluation board?

The ISL9113AIRAZ-T evaluation board is a fully assembled, tested platform for validating the ISL9113A synchronous boost converter IC. It enables engineers to evaluate adjustable-output voltage operation, light-load Skip mode efficiency, startup behavior, transient response, and fault-protection features - all using the exact 8-lead DFN package and recommended 2.2µH inductor/4.7µF capacitor layout specified in the ISL9113A datasheet.

Does the ISL9113AIRAZ-T support fixed 5V output or only adjustable configurations?

The ISL9113AIRAZ-T evaluation board is configured for adjustable output via the FB pin, consistent with the ISL9113A's adjustable variant (as indicated by "3AA" marking and "Adjustable" in ordering information). It does not implement a fixed 5V configuration; users must set R1/R2 feedback resistors per Equation 1 (VOUT = VFB × (1 + R1/R2)) to target specific output voltages such as 5.0V for USB-OTG compliance.

Can the ISL9113AIRAZ-T be used to verify thermal performance of the ISL9113A IC?

Yes - the ISL9113AIRAZ-T board implements the recommended thermal layout: exposed pad soldered to PGND with ≥4 thermal vias to internal ground planes. This allows direct measurement of junction temperature rise under load, validation of the ISL9113A's 150°C thermal shutdown threshold and 25°C hysteresis, and correlation of measured θJA (80°C/W) against system-level thermal constraints in handheld applications.

What protection features of the ISL9113A can be observed on the ISL9113AIRAZ-T board?

On the ISL9113AIRAZ-T board, engineers can directly observe four key protections: output overvoltage lockout (triggered at 5.9V), overtemperature shutdown (at ~150°C), short-circuit response (immediate shutdown when VOUT < VBAT), and undervoltage lockout (disable below ~0.7V VBAT). Each fault causes automatic 200ms restart cycles, replicating real-world battery-depletion and fault-recovery behavior documented in Table 3 of the ISL9113A datasheet.

Is the ISL9113AIRAZ-T compatible with standard USB-OTG power requirements?

Yes - the ISL9113AIRAZ-T, when configured for 5.0V output, delivers up to 500mA from a 3.0V input per datasheet specifications, meeting USB-OTG host-mode minimum current requirements. Its 1.8MHz switching frequency minimizes EMI near USB signal lines, and output disconnect during shutdown prevents battery drain - both critical for certified USB-OTG implementations using the ISL9113A IC.