ISL6549CB

Overview

The ISL6549CB is a dual regulator power controller designed for single 12V input supply applications. It integrates a synchronous rectified buck PWM controller and a linear LDO regulator within a single package. The device supports switching frequencies ranging from 150 kHz to 1 MHz and provides two independent output channels. The buck converter supports up to 20 A output current with an adjustable voltage range of 800 mV to 13.2 V. It operates within a temperature range of 0°C to +70°C and is housed in a 14-lead SOIC-Narrow package.

Feature Summary

• Integrates a synchronous buck PWM controller and a linear LDO regulator for combined high-current and low-noise power delivery.
• Supports wide switching frequency adjustment from 150 kHz to 1 MHz to optimize external component size and efficiency.
• Features 100% maximum duty cycle capability for minimal dropout voltage operation in the buck converter stage.

Applications

• Single-rail power systems requiring both high-current digital logic and sensitive analog circuitry
• Telecommunications equipment with mixed voltage requirements
• Industrial control systems utilizing 12V input supplies

Procurement Notes

Verify component authenticity through authorized Renesas or Intersil distributors due to end-of-life status. Confirm RoHS compliance markings on the package. Check manufacturing date codes against discontinuation notifications. Ensure storage conditions meet humidity sensitivity requirements before reflow soldering. Validate pinout compatibility with existing PCB layouts.

Selection Notes

Select this component when a single 12V rail must power both high-current loads and precision analog circuits. The integrated topology reduces board space compared to discrete solutions. Consider thermal management requirements for the SOIC-14 package under full load conditions. Verify that the required output voltages fall within the specified 800 mV to 13.2 V range for the buck channel.

Part Context

The ISL6549CB belongs to the ISL6549 family of dual regulator controllers. It serves as a successor to earlier dual regulator designs by combining synchronous buck technology with an integrated LDO. This integration simplifies power distribution network design for systems requiring multiple voltage levels from a single input source.

Replacement Considerations

The ISL6549CBZ is the lead-free variant of this component. Other compatible devices include the ISL6529 series, though pinouts and specific electrical characteristics may differ. Verify functional equivalence before substitution.