ISL8105CRZ-T

DC DC Switching Controllers Overview

The ISL8105CRZ-T is a single-phase synchronous buck converter PWM controller manufactured by Renesas Electronics Corporation. It operates from +5V or +12V bias supply voltages and integrates an LDO, boot diode, and N-channel MOSFET gate drivers to reduce external component count. The device utilizes voltage-mode control with a maximum duty cycle of 100% and supports switching frequencies up to 600 kHz. It features overcurrent protection via bottom-side MOSFET RDS(on) monitoring and safe start-up for pre-biased loads. The IC is housed in a 32-lead QFN package and operates within a temperature range of -40°C to +85°C.

DC DC Switching Controllers Feature Summary

• Integrates linear regulator, boot diode, and N-channel MOSFET gate drivers to minimize external components
• Supports safe start-up capability for pre-biased load applications
• Provides overcurrent protection by monitoring the ON-resistance of the bottom-side MOSFET

DC DC Switching Controllers Applications

• Single-phase synchronous buck converters
• Pre-biased load power supplies
• Space-constrained board designs requiring reduced component count

DC DC Switching Controllers Procurement Notes

Verify the specific suffix 'CRZ' against official Renesas documentation to confirm package type (QFN) and commercial temperature rating. Confirm current availability status as older Intersil/Renesas parts may be subject to end-of-life notices. Ensure design-in compatibility with required input voltage ranges (+5V/+12V) and switching frequency specifications before procurement.

DC DC Switching Controllers Selection Notes

Select this controller for applications requiring integrated gate drivers and simplified bill of materials. It is suitable for designs needing voltage-mode control with high accuracy output voltage references. Consider the 32-lead QFN package constraints for thermal management and PCB layout. Verify that the required switching frequency falls within the supported range and that the input supply matches the specified bias voltage options.

DC DC Switching Controllers Part Context

The ISL8105 series consists of single-phase synchronous buck converter PWM controllers originally developed by Intersil and acquired by Renesas. These devices are designed to simplify power supply design by integrating key driver components. The CRZ variant specifically denotes the commercial temperature grade and QFN packaging option within the broader ISL8105 family.

DC DC Switching Controllers Replacement Considerations

Check for direct pin-compatible replacements within the ISL8105 family, such as ISL8105CBZ or ISL8105IBZ, noting differences in switching frequency and package. Verify if newer Renesas PMICs offer similar integration levels with updated manufacturing processes.