ISL6522IBZ Equivalent & Substitute Parts

Part Overview

The ISL6522IBZ is a buck regulator positive output step-down DC-DC controller IC manufactured by Renesas Electronics Corporation in a 14-SOIC package. This device functions as a transistor driver for step-down voltage conversion with a single output phase and 100% maximum duty cycle. The ISL6522IBZ is classified as obsolete, making identification of functionally equivalent substitute components necessary for ongoing design support and procurement.

Substiute Parts

ISL6522IBZ

Renesas Electronics CorporationIn Stock: 1003ISL6522IBZ Datasheet

Current PartRFQ

ISL6535IBZ

IntersilIn Stock: 1416ISL6535IBZ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute components for the ISL6522IBZ are identified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Critical Matching Parameters:

• Output Type: Transistor Driver
• Function: Step-Down
• 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
• Operating Temperature: -40°C ~ 85°C (TA)
• Package / Case: 14-SOIC (0.154", 3.90mm Width)

The ISL6535IBZ meets all critical electrical and mechanical parameters, enabling direct substitution in applications requiring buck regulator controller functionality with identical supply voltage range, switching frequency, and thermal operating range.

Parameter Comparison

Engineering Selection Recommendations

The ISL6535IBZ is the qualified substitute for the obsolete ISL6522IBZ. Selection is based on the following engineering criteria:

Product Status: The ISL6522IBZ is obsolete, while the ISL6535IBZ maintains active product status, ensuring continued availability and manufacturing support.

Electrical Equivalence: Both devices operate identically across all critical parameters including supply voltage range (10.8V ~ 13.2V), switching frequency (200kHz), maximum duty cycle (100%), and thermal operating range (-40°C ~ 85°C).

Package Compatibility: Both components use the 14-SOIC package with identical physical dimensions (0.154", 3.90mm Width), enabling direct PCB footprint compatibility without layout modification.

Compliance: The ISL6535IBZ maintains EAR99 export classification and operates within standard industrial compliance frameworks, consistent with the original design requirements.

Frequently Asked Questions (FAQ)

Q: Can the ISL6535IBZ directly replace the ISL6522IBZ without circuit modification?

A: Yes. The ISL6535IBZ matches all critical electrical parameters and uses the identical 14-SOIC package. Direct substitution is supported without circuit redesign when control feature differences are evaluated for the specific application.

Q: What is the difference in control features between these devices?

A: The ISL6522IBZ includes Phase Control in its feature set, while the ISL6535IBZ includes Current Limit. Both devices provide Enable, Frequency Control, and Soft Start functionality. Application requirements determine whether these feature differences impact suitability.

Q: Are there any compliance or certification differences?

A: Both devices carry EAR99 export classification. The ISL6522IBZ is ROHS3 compliant with MSL 3 (168 Hours). Verify specific compliance requirements for your application before final selection.

Q: Is the 14-SOIC package identical between both parts?

A: Yes. Both devices use the 14-SOIC package with 0.154" (3.90mm) width, ensuring identical PCB footprint and mounting compatibility.

Q: Why is the ISL6522IBZ obsolete?

A: The ISL6522IBZ is classified as obsolete by the manufacturer. The ISL6535IBZ represents the active equivalent for ongoing procurement and new design applications.