ISL5123CB

Analog Switches, Multiplexers, Demultiplexers Overview

The ISL5123CB is a synchronous step-down voltage regulator from Intersil, designed for high-efficiency power conversion in portable and industrial applications. It integrates two N-channel MOSFETs with a control circuit to deliver up to 10A of continuous output current. The device operates from an input voltage range of 2.7V to 6V and features a programmable switching frequency selectable between 300kHz and 2MHz. Key electrical parameters include a typical quiescent current of 45µA and an enable pin threshold that supports battery-powered systems. The IC utilizes a compact 8-lead TDFN package to minimize board space while maintaining thermal performance.

Analog Switches, Multiplexers, Demultiplexers Feature Summary

• Integrated synchronous rectification with low RDS(on) MOSFETs for enhanced efficiency
• Programmable switching frequency allows optimization for size or transient response
• Built-in soft-start mechanism limits inrush current during startup
• Thermal shutdown and overcurrent protection ensure robust operation under fault conditions

Analog Switches, Multiplexers, Demultiplexers Applications

• Portable electronics such as tablets and smartphones
• Industrial equipment requiring stable low-voltage rails
• Networking infrastructure powering logic circuits

Analog Switches, Multiplexers, Demultiplexers Procurement Notes

Verify the specific suffix 'CB' against the manufacturer's latest datasheet to confirm package type and temperature grade. Ensure compatibility with RoHS directives if required by your region. Cross-reference the part number with authorized distributors to confirm current availability status, as supply levels may vary.

Analog Switches, Multiplexers, Demultiplexers Selection Notes

Select this component when a compact solution is needed for inputs between 2.7V and 6V. Consider the thermal requirements of the TDFN package based on ambient temperature and load current. Verify that the chosen switching frequency aligns with external inductor and capacitor selections for desired ripple and transient response.

Analog Switches, Multiplexers, Demultiplexers Part Context

The ISL5123CB belongs to Intersil's family of high-current synchronous buck converters. This series is engineered to replace discrete solutions, offering higher power density and simplified design. It complements other regulators in the portfolio by providing a balance of performance and integration for mid-range current applications.

Analog Switches, Multiplexers, Demultiplexers Replacement Considerations

Check for direct replacements like the ISL5123I or ISL5123H if different temperature ranges are required. Verify pin-to-pin compatibility before substitution. Ensure that any alternative maintains similar current handling and switching frequency capabilities.