ISL6523ACB

Overview

The ISL6523ACB is a dual switching controller from Intersil, designed for high-performance microprocessor and computer applications. It provides power control and protection for four output voltages. The device operates in voltage-mode control using pulse width modulation techniques. It integrates two synchronous step-down controllers and two linear regulators (LDOs). The component functions at a switching frequency of 200kHz and is housed in a 28-SOIC package.

Feature Summary

• Integrates dual synchronous buck controllers and dual LDOs for multi-rail power delivery
• Provides comprehensive power control and protection mechanisms for critical loads
• Utilizes voltage-mode control with pulse width modulation for stable regulation

Applications

• High-performance microprocessor power systems
• Computer motherboard voltage regulation modules
• Multi-output power supply designs requiring synchronized buck conversion

Procurement Notes

Verify the specific suffix 'CB' against the manufacturer's current documentation to confirm pinout and thermal specifications. Confirm RoHS compliance status as indicated in legacy records. Check for discontinued status or last-time-buy notifications from Renesas Electronics, as this part may no longer be actively manufactured. Ensure the 28-SOIC package availability matches your assembly requirements.

Selection Notes

Select this component when designing systems requiring integrated dual synchronous buck and dual LDO outputs in a single package. It is suitable for applications needing precise voltage-mode control for processor cores. Consider the 200kHz switching frequency for EMI and efficiency trade-offs. Verify that the 28-SOIC footprint fits the PCB layout constraints compared to alternative QFN packages.

Part Context

The ISL6523 series belongs to Intersil's portfolio of power management ICs targeting CPU and chipset power delivery. It is part of a family that includes variants like the ISL6524. The ACB suffix typically denotes specific temperature ranges and packaging options within the standard ISL6523 functional block. Renesas Electronics now manages the Intersil product line.

Replacement Considerations

Check for direct cross-references such as the ISL6524CB if additional channels are required. Verify compatibility with existing gate drivers and feedback networks when substituting with other dual-buck controllers from Renesas or third-party vendors.