ISL78235AARZ-T

Voltage Regulators - DC DC Switching Regulators Overview

The ISL78235AARZ-T is an automotive-grade, monolithic synchronous buck regulator from the Renesas ISL78235 series. It delivers a continuous output current of 5 A with a single output channel. The device operates within an input voltage range of 2.7 V to 5.5 V and supports adjustable switching frequencies between 500 kHz and 4 MHz, with a typical default frequency of 2 MHz. It utilizes current mode control architecture for fast transient response and excellent loop stability. The component is housed in a WQFN-EP-16 package and is rated for operation across an extended temperature range from -40°C to +105°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Automotive-grade synchronous buck topology designed for high reliability in vehicle environments
• Integrated low on-resistance power FETs to maximize efficiency and minimize external component count
• Current mode control architecture enabling fast transient response and stable operation at high frequencies
• Comprehensive fault protection including hiccup mode current limiting, overvoltage, and overtemperature safeguards

Voltage Regulators - DC DC Switching Regulators Applications

• Power sequencing and I/O expansion for high-performance printers and multifunction peripherals
• Vehicle computer systems supporting next-generation electronic/electrical architectures
• General automotive electronics requiring robust 5 A step-down regulation

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging when ordering, as this differs from tube-packaged variants. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure the selected variant matches the required thermal performance for the intended application environment. Cross-reference the datasheet for exact pinout compatibility if replacing existing designs.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component for applications requiring a single 5 A output from a 2.7 V to 5.5 V input source. The 2 MHz default switching frequency allows for smaller passive components compared to lower-frequency alternatives. Consider the WQFN-EP-16 package for its thermal dissipation capabilities in space-constrained designs. Verify that the load requirements do not exceed the continuous current rating under maximum operating temperatures.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the ISL78235 family of automotive synchronous buck regulators. It shares architectural similarities with the ISL8025 but is optimized for automotive qualification standards. The series provides a scalable solution for various current requirements, with other members offering different current capacities or pin configurations while maintaining compatible control interfaces.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

The ISL78235AARZ is a pin-compatible alternative available in tube packaging. Designers should verify that the packaging difference does not impact automated assembly processes. Electrical characteristics remain consistent between the reel and tube versions, allowing for direct substitution based on supply chain availability.