Intersil's highly-integrated synchronous buck regulators offer efficiency and flexibility



ISL85410 and ISL85418 synchronous buck regulators

Intersil, a leading provider of innovative power management and precision analog solutions, released the ISL85410 and ISL85418 synchronous buck regulators, ideal for complex industrial and medical systems. The buck regulators efficiently down-convert the DC voltage from a power supply or battery to power multiple microprocessors and board components, at various voltage requirements, helping to minimize power loss. The ISL85410/18 offer designers maximum flexibility, operating over a wide range of input and output voltages, and because the devices are pin-to-pin compatible, a single layout can be leveraged across multiple systems, accelerating time to market and reducing design cost.

The ISL85410/18 synchronous buck regulators are highly integrated resulting in better efficiency while reducing the number of required external components and enabling a compact footprint. The ISL85410/18 synchronous buck regulators integrate both the high-side and low-side field-effect transistors (FETs), eliminating the need for an inefficient low-side diode. By also eliminating the need for external compensation, the overall bill of materials (BOM) is reduced to only five external components. The minimal component count of the ISL85410/18 reduces the solution footprint size and overall space requirements for a power design, which is important for space constrained applications.

Intersil’s ISL85415 synchronous buck regulator is also pin-to-pin compatible with the ISL85410/18, and together provide system designers with a versatile down-converting solution that can be used to support a wide input voltage range from 3V to 36V with 500mA to 1A options. Designers can easily reuse a single proven, reliable layout for different power levels allowing for enhanced flexibility, reduced design time and accelerated time to market.

“From industrial process control to medical imaging, industrial designers are being asked to reduce design time and improve efficiency while ensuring the delivery of robust and reliable solutions,” said Colm Brazil, senior marketing manager for Intersil’s Industrial Power group. “To address the increasing complexity of industrial system designs and the proliferation of voltage rails, the ISL8541X family of synchronous buck regulators delivers an integrated, reliable and easy-to-use solution that brings flexibility, a reduced component count and improved efficiency to power designs.”

Features and Specifications
• Integrated low side FET
• Integrated compensation
• Supports input voltage range of 3V to 36V
• Wide Vout range from 0.6V to 95% of Vin
• Compact 4mm x 3mm package
• Easy to design with using Intersil's iSim and online design/layout files

Pricing and Availability
The ISL85410, ISL85418 and ISL85415 synchronous buck regulators are available now, priced respectively at $1.75 (USD), $1.55 (USD) and $1.45 (USD) each in 1,000-piece quantities. The ISL85410EVAL1Z, ISL85418EVAL1Z and ISL85415EVAL1Z evaluation boards are available for $72 (USD) each. In addition, low-cost ISL85410DEMO1Z, ISL85418DEMO1Z and ISL85415DEMO1Z demo boards can be purchased for $20 (USD) each.

ISL8541X family of synchronous buck regulators 

iSim web-based design tool

ISL85410EVAL1Z, ISL85418EVAL1Z and ISL85415EVAL1Z evaluation boards

ISL85410DEMO1Z, ISL85418DEMO1Z and ISL85415DEMO1Z demo boards


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