ISL91127IRNZ-T

Voltage Regulators - DC DC Switching Regulators Overview

The ISL91127IRNZ-T is a high-efficiency buck-boost switching regulator IC featuring 4.25A switches, designed for single-cell lithium-ion battery applications. It operates with an input voltage range of 1.8V to 5.5V and provides a fixed 3.3V output. The device utilizes a proprietary algorithm for seamless transition between buck and boost modes, maintaining regulation even when the input voltage approaches the output level. Key electrical parameters include a 2.5MHz switching frequency, 30μA quiescent current, and operation within a -40°C to +85°C temperature range.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Proprietary buck-boost algorithm ensures stable voltage regulation across varying input conditions
• Seamless automatic transition between buck and boost operating modes without interruption
• Low static current design optimizes efficiency under light load conditions
• Compact 20-QFN package suitable for space-constrained portable electronics

Voltage Regulators - DC DC Switching Regulators Applications

• Handheld and battery-powered consumer devices
• Medical equipment requiring reliable power management
• Smartphone and tablet systems preventing data loss during shutdown
• Wireless communication devices and RF power amplifiers

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'T' indicates tape and reel packaging configuration. Confirm the manufacturer designation matches Renesas Electronics Corporation or Intersil legacy branding. Ensure the component meets RoHS compliance standards as specified in official documentation. Cross-reference the full part number against authorized distributor catalogs to validate authenticity and current production status before finalizing procurement orders.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component for applications requiring efficient power conversion from single-cell lithium-ion batteries where input voltage may fluctuate above or below the required output level. The fixed 3.3V output and high switch current capability make it suitable for powering processors and peripherals in compact mobile designs. Consider the thermal performance and PCB layout requirements associated with the QFN package for optimal heat dissipation.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the ISL91127 series of high-efficiency buck-boost regulators. It is manufactured by Renesas Electronics Corporation, formerly Intersil. The series is engineered for portable electronics, offering a balance of high current capability and energy efficiency. The ISL91127IRNZ-T variant specifically denotes the integrated circuit in tape and reel packaging for automated assembly processes.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Consult official datasheets for direct pin-to-pin compatible alternatives within the same product family. Verify that any substitute component maintains identical input/output voltage ranges and current capabilities. Ensure thermal characteristics and package dimensions match the original design constraints.