ISL6522BIR-T Equivalent & Substitute Parts

Part Overview

The ISL6522BIR-T is a Buck Regulator Positive Output Step-Down DC-DC Controller IC manufactured by Renesas Electronics Corporation in a 16-QFN (5x5) package. This component functions as a transistor driver for single-output, single-phase buck topology applications with a 200kHz switching frequency and 100% maximum duty cycle. The ISL6522BIR-T is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity.

Substiute Parts

ISL6522BIR-T

Renesas Electronics CorporationIn Stock: 769ISL6522BIR-T Datasheet

Current PartRFQ

ISL6522BIRZ-T

Renesas Electronics CorporationIn Stock: 786ISL6522BIRZ-T Datasheet

DirectRFQ

ISL6522BIRZ-TK

Renesas Electronics CorporationIn Stock: 1101ISL6522BIRZ-TK Datasheet

Parametric EquivalentRFQ

ISL6522IRZ-T

Renesas Electronics CorporationIn Stock: 1699ISL6522IRZ-T Datasheet

Parametric EquivalentRFQ

ISL6522IRZ-TK

Renesas Electronics CorporationIn Stock: 1069ISL6522IRZ-TK Datasheet

Parametric EquivalentRFQ

ISL6535IRZ-T

Renesas Electronics CorporationIn Stock: 931ISL6535IRZ-T Datasheet

Parametric EquivalentRFQ

ISL6535IRZ-TK

Renesas Electronics CorporationIn Stock: 1170ISL6535IRZ-TK Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ISL6522BIR-T are classified into two categories based on allowed electrical and mechanical parameters:

Direct Substitutes (ISL6522 Series - 16-QFN 5x5): ISL6522BIRZ-T, ISL6522BIRZ-TK, ISL6522IRZ-T, and ISL6522IRZ-TK maintain identical electrical specifications and package dimensions (16-QFN 5x5). These parts differ only in product status (Active vs. Obsolete) and packaging format (Tape & Reel vs. standard packaging). All ISL6522 variants share identical control features: Enable, Frequency Control, Phase Control, and Soft Start.

Parametric Equivalents (ISL6535 Series - 16-QFN 4x4): ISL6535IRZ-T and ISL6535IRZ-TK are parametric equivalents with identical electrical performance but differ in package dimensions (16-QFN 4x4 vs. 5x5) and control features. The ISL6535 series includes Current Limit control instead of Phase Control, and omits Soft Start functionality. These parts require PCB layout modification due to different package footprint.

Substitution Criteria:

• Voltage supply range: 10.8V ~ 13.2V (all parts)
• Switching frequency: 200kHz (all parts)
• Duty cycle maximum: 100% (all parts)
• Synchronous rectifier: Yes (all parts)
• Operating temperature: -40°C ~ 85°C (all parts)
• Mounting type: Surface Mount (all parts)

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (No PCB Modification Required): ISL6522BIRZ-T, ISL6522BIRZ-TK, ISL6522IRZ-T, and ISL6522IRZ-TK are direct substitutes for the ISL6522BIR-T. All ISL6522 variants maintain identical package footprint (16-QFN 5x5), electrical specifications, and control feature sets. These parts are Active status products with ROHS3 compliance, providing long-term availability and regulatory alignment. Selection among ISL6522 variants depends on packaging format requirements (Tape & Reel vs. standard) and inventory availability.

For Parametric Equivalent Replacement (PCB Layout Modification Required): ISL6535IRZ-T and ISL6535IRZ-TK are parametric equivalents with identical electrical performance but require PCB layout modification due to different package dimensions (16-QFN 4x4 vs. 5x5). The ISL6535 series includes Current Limit control functionality and omits Phase Control and Soft Start features present in the ISL6522 series. These parts are suitable only when design specifications accommodate the control feature differences and PCB layout changes are feasible.

Compliance and Availability: All substitute parts are Active status products with ROHS3 compliance and REACH Unaffected designation. The ISL6522 series offers higher inventory availability (764-1612 units) compared to ISL6535 series (909-1145 units), supporting production continuity for high-volume applications.

Frequently Asked Questions (FAQ)

Q: Can ISL6522BIRZ-T directly replace ISL6522BIR-T without PCB changes? A: Yes. ISL6522BIRZ-T maintains identical electrical specifications, package dimensions (16-QFN 5x5), and control features. The primary difference is product status (Active vs. Obsolete) and packaging format (Tape & Reel). No PCB layout modification is required.

Q: What is the difference between ISL6522BIRZ-T and ISL6522IRZ-T? A: Both parts share identical electrical specifications, package dimensions, and control features. The difference lies in the part number designation (B vs. I suffix), which reflects internal Renesas classification. Both are Active status, ROHS3 compliant, and suitable for direct substitution.

Q: Why do ISL6535 parts require PCB modification? A: ISL6535 parts use a 16-QFN (4x4) package, while ISL6522 parts use 16-QFN (5x5). The different package footprints require PCB layout changes. Additionally, ISL6535 includes Current Limit control and omits Phase Control and Soft Start features, requiring design evaluation.

Q: Are all substitute parts RoHS compliant? A: ISL6522BIR-T is RoHS non-compliant. All substitute parts (ISL6522BIRZ-T, ISL6522BIRZ-TK, ISL6522IRZ-T, ISL6522IRZ-TK, ISL6535IRZ-T, ISL6535IRZ-TK) are ROHS3 compliant, meeting current regulatory requirements.

Q: What is the difference between Tape & Reel and standard packaging? A: Tape & Reel packaging is used for automated assembly processes and high-volume production. Standard packaging is used for manual handling or lower-volume applications. Electrical performance and functionality are identical; the difference is in delivery format and handling method.

Q: Which substitute part offers the best inventory availability? A: ISL6522IRZ-T offers the highest inventory availability at 1612 units. ISL6522BIRZ-TK provides 1038 units, and ISL6522IRZ-TK provides 966 units. All ISL6522 variants offer superior availability compared to ISL6535 series parts.