ISL6520CBZ Equivalent & Substitute Parts

Part Overview

The ISL6520CBZ is a buck regulator positive output step-down DC-DC controller IC manufactured by Renesas Electronics Corporation in 8-SOIC packaging. This device functions as a transistor driver for step-down topology applications with a single output phase and 300kHz switching frequency. The part is currently obsolete, making identification of equivalent substitute components essential for ongoing system support, design updates, and procurement continuity.

Substiute Parts

ISL6520CBZ

Renesas Electronics CorporationIn Stock: 2091ISL6520CBZ Datasheet

Current PartRFQ

ISL6431CB

IntersilIn Stock: 2152ISL6431CB Datasheet

Parametric EquivalentRFQ

ISL6520ACBZ

IntersilIn Stock: 1311ISL6520ACBZ Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ISL6520CBZ are identified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Critical Matching Parameters:

• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Output Type: Transistor Driver
• Function: Step-Down
• Output Configuration: Positive
• Topology: Buck
• Number of Outputs: 1
• Output Phases: 1
• Voltage - Supply (Vcc/Vdd): 4.5V ~ 5.5V
• Frequency - Switching: 300kHz
• Duty Cycle (Max): 100%
• Synchronous Rectifier: Yes
• Control Features: Phase Control
• Operating Temperature: 0°C ~ 70°C (TA)
• Mounting Type: Surface Mount

All identified substitute parts match these parameters exactly, ensuring functional and mechanical compatibility with the original ISL6520CBZ design.

Parameter Comparison

Engineering Selection Recommendations

ISL6431CB (Intersil): This part provides full parametric equivalence to the ISL6520CBZ across all electrical and mechanical specifications. However, this part is also obsolete and carries RoHS non-compliant status. Selection of this substitute is appropriate only when RoHS compliance is not a design requirement and existing inventory is available.

ISL6520ACBZ (Intersil): This part matches all electrical and mechanical parameters of the ISL6520CBZ and maintains active product status, ensuring long-term availability and supply chain continuity. This substitute is the preferred selection for new designs, system updates, and applications requiring current product support. The ISL6520ACBZ is manufactured by Intersil under the same base product number (ISL6520) as the original Renesas part.

Frequently Asked Questions (FAQ)

Q: Can ISL6431CB be used as a direct replacement for ISL6520CBZ? A: Yes, ISL6431CB provides full parametric equivalence in electrical function, switching frequency, output configuration, and 8-SOIC package form factor. However, ISL6431CB is obsolete and RoHS non-compliant, limiting its use to legacy system maintenance where compliance is not required.

Q: Is ISL6520ACBZ a suitable substitute for new designs? A: Yes, ISL6520ACBZ is the recommended substitute for new designs. It maintains active product status, ensuring availability and supply chain support. All electrical and mechanical parameters match the ISL6520CBZ specification.

Q: Are there package compatibility concerns between these parts? A: No. All three parts use identical 8-SOIC (0.154", 3.90mm Width) surface mount packaging, ensuring direct PCB layout compatibility without redesign.

Q: What is the primary difference between ISL6520CBZ and ISL6520ACBZ? A: The primary difference is product status. ISL6520CBZ is obsolete, while ISL6520ACBZ is active. Both parts share the same base product number (ISL6520) and identical electrical specifications. ISL6520ACBZ is manufactured by Intersil.

Q: How do the RoHS compliance statuses differ among these parts? A: ISL6520CBZ is ROHS3 compliant. ISL6431CB is RoHS non-compliant. ISL6520ACBZ compliance information is not specified in the provided data. Verify RoHS requirements with your design specifications before final part selection.

Q: Can these parts be used interchangeably in existing applications? A: Yes, all three parts are interchangeable from an electrical and mechanical standpoint, provided that product status and compliance requirements are satisfied for your specific application.