ISL6535CBZ Equivalent & Substitute Parts

Part Overview

The ISL6535CBZ is a buck regulator positive output step-down DC-DC controller IC manufactured by Renesas Electronics Corporation. This component functions as a transistor driver for step-down voltage conversion applications with a single output phase. The ISL6535CBZ is classified as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity. The part is housed in a 14-SOIC package and operates within a supply voltage range of 10.8V to 13.2V with a 200kHz switching frequency.

Substiute Parts

ISL6535CBZ

Renesas Electronics CorporationIn Stock: 1463ISL6535CBZ Datasheet

Current PartRFQ

ISL6535IRZ

Renesas Electronics CorporationIn Stock: 1993ISL6535IRZ Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ISL6535CBZ is determined by strict alignment of the following core electrical and mechanical parameters:

• Manufacturer: Renesas Electronics Corporation (same product family)
• Base Product Number: ISL6535 (same controller architecture)
• Function: Step-Down DC-DC Controller
• Output Type: Transistor Driver
• Output Configuration: Positive
• Topology: Buck
• Number of Outputs: 1
• Output Phases: 1
• Voltage - Supply (Vcc/Vdd): 10.8V ~ 13.2V
• Frequency - Switching: 200kHz
• Duty Cycle (Max): 100%
• Synchronous Rectifier: Yes
• Control Features: Current Limit, Enable, Frequency Control, Soft Start
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 3 (168 Hours)

The ISL6535IRZ meets all core electrical specifications and compliance requirements. Package differences (14-SOIC versus 16-QFN) and operating temperature range variations are secondary considerations that must be evaluated within the context of specific application requirements and PCB layout constraints.

Parameter Comparison

Engineering Selection Recommendations

The ISL6535IRZ is a direct functional equivalent to the ISL6535CBZ based on identical electrical specifications, control architecture, and compliance certifications. The ISL6535IRZ carries active product status from Renesas Electronics Corporation, ensuring ongoing availability and manufacturing support compared to the obsolete ISL6535CBZ.

Key considerations for component selection:

The ISL6535IRZ features an extended operating temperature range (-40°C to 85°C) compared to the ISL6535CBZ (0°C to 70°C), providing broader environmental compatibility for applications requiring wider temperature operation.

Package transition from 14-SOIC to 16-QFN (4x4) requires PCB layout modification. The QFN package includes an exposed pad for enhanced thermal management, which may improve thermal performance in high-current applications.

Both components maintain ROHS3 compliance and identical moisture sensitivity specifications, ensuring regulatory and handling consistency.

Frequently Asked Questions (FAQ)

Q: Can ISL6535IRZ directly replace ISL6535CBZ without circuit modification?

A: Electrical functionality is identical. Package differences require PCB layout redesign. Pin-to-pin compatibility must be verified against the specific application schematic and PCB footprint.

Q: What are the implications of the operating temperature range difference?

A: The ISL6535CBZ operates from 0°C to 70°C, while the ISL6535IRZ operates from -40°C to 85°C. Applications requiring operation below 0°C or above 70°C must use the ISL6535IRZ. Applications within the 0°C to 70°C range are compatible with both parts.

Q: Why is the ISL6535CBZ obsolete?

A: Product obsolescence is determined by the manufacturer. The ISL6535IRZ represents the active continuation of the ISL6535 controller family and is the recommended solution for new designs and production continuity.

Q: Are there thermal performance differences between the 14-SOIC and 16-QFN packages?

A: The 16-QFN package includes an exposed pad for direct thermal coupling to PCB ground planes, typically providing superior thermal performance compared to the 14-SOIC package. Thermal performance depends on PCB design and copper area allocation.

Q: Do both parts require identical external component values?

A: Both controllers share identical electrical specifications and control features. External component selection (inductors, capacitors, resistors) is determined by the application output voltage and current requirements, not by the package type.

Q: What is the inventory status of these components?

A: ISL6535CBZ: 1415 pieces in stock. ISL6535IRZ: 1900 pieces in stock. Both are available as new original components.