ISL8025AIRTAJZ-T

Voltage Regulators - DC DC Switching Regulators Overview

The ISL8025AIRTAJZ-T is a monolithic synchronous step-down DC/DC converter from the Renesas ISL8025A series. It delivers 5A continuous output current with an input voltage range of 2.7V to 5.5V and adjustable output from 600mV to 5.5V. The device operates at a default switching frequency of 2MHz, adjustable between 500kHz and 4MHz. It features low ON-resistance FETs (36mΩ P-channel high-side, 13mΩ N-channel low-side) for high efficiency up to 95%. The unit includes internal soft-start, hiccup mode current limiting, overvoltage, and overtemperature protection.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates low ON-resistance P-channel and N-channel FETs to maximize efficiency and minimize external component count
• Supports adjustable switching frequency from 500kHz to 4MHz with external synchronization capability
• Provides comprehensive fault protection including hiccup mode current limiting, overvoltage, and overtemperature safeguards

Voltage Regulators - DC DC Switching Regulators Applications

• Portable electronics requiring efficient power management
• Battery-powered devices needing extended runtime
• Embedded systems utilizing single-cell lithium-ion or lithium-polymer batteries

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the suffix 'T' indicates tape-and-reel packaging when ordering. Confirm the specific temperature grade 'I' corresponds to industrial specifications (-40°C to +85°C). Ensure compatibility with the TQFN-EP-16 package footprint during PCB layout. Cross-reference the manufacturer part number directly with official Renesas documentation to avoid counterfeit components.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this model for applications requiring 5A output current with a 2MHz default switching frequency. Choose this variant over the standard ISL8025 if the higher default frequency is preferred for smaller passive components. Verify that the input voltage range of 2.7V to 5.5V aligns with the system power supply. Consider the thermal performance of the TQFN-EP-16 package for the intended enclosure design.

Voltage Regulators - DC DC Switching Regulators Part Context

This component belongs to the ISL8025A family of highly efficient synchronous buck regulators. It shares pin-to-pin compatibility with the ISL8023 and ISL8024 series, facilitating design upgrades. The ISL8025A specifically defaults to a 2MHz switching frequency, distinguishing it from the 1MHz default of the base ISL8025 model while maintaining similar electrical characteristics.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

The ISL8023AIRTAJZ-T and ISL8024AIRTAJZ-T are pin-to-pin compatible alternatives within the same family. These variants offer lower output currents of 3A and 4A respectively, while maintaining identical input/output voltage ranges and control interfaces.