ISL8105AIBZ Equivalent & Substitute Parts

Part Overview

The ISL8105AIBZ is a buck regulator positive output step-down DC-DC controller IC manufactured by Renesas Electronics Corporation. This Surface Mount device operates in the 6.5V to 14.4V supply voltage range with a 600kHz switching frequency and delivers a single-phase output with synchronous rectification capability. The part is Active status and widely used in power management applications requiring efficient step-down voltage conversion with integrated current limiting and enable control features. Substitute parts are identified when equivalent electrical and mechanical parameters allow direct functional replacement in the same application circuit.

Substiute Parts

ISL8105AIBZ

Renesas Electronics CorporationIn Stock: 2919ISL8105AIBZ Datasheet

Current PartRFQ

ISL8105IBZ

Renesas Electronics CorporationIn Stock: 1225ISL8105IBZ Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ISL8105AIBZ are identified based on strict equivalence of the following critical parameters:

• Manufacturer: Renesas Electronics Corporation
• Category: Power Management (PMIC)
• Function: Step-Down Buck Regulator Controller
• Output Type: Transistor Driver
• Output Configuration: Positive, Single Output
• Voltage Supply Range: 6.5V ~ 14.4V
• Duty Cycle (Max): 100%
• Synchronous Rectifier: Yes
• Control Features: Current Limit, Enable
• Operating Temperature Range: -40°C ~ 85°C (TA)
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Mounting Type: Surface Mount
• Product Status: Active
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 3 (168 Hours)

The ISL8105IBZ meets all these criteria and qualifies as a parametric equivalent. The switching frequency difference (300kHz vs 600kHz) represents a design variation within the ISL8105 product family but does not prevent functional substitution when application circuit design accommodates the frequency specification.

Parameter Comparison

Engineering Selection Recommendations

Both the ISL8105AIBZ and ISL8105IBZ are Active status products manufactured by Renesas Electronics Corporation with identical RoHS3 compliance and MSL ratings. Both devices are housed in the same 8-SOIC package and support identical supply voltage ranges, output configurations, and control features. Selection between these parts depends on application-specific switching frequency requirements. The ISL8105AIBZ operates at 600kHz, while the ISL8105IBZ operates at 300kHz. Circuit design parameters such as inductor selection, output filter design, and thermal management must align with the chosen switching frequency. Both parts maintain full compliance with ROHS3 and REACH requirements, ensuring regulatory compatibility in equivalent applications.

Frequently Asked Questions (FAQ)

Q: Can ISL8105IBZ directly replace ISL8105AIBZ in an existing circuit?

A: Direct pin-for-pin replacement is possible due to identical 8-SOIC packaging and pinout. However, the switching frequency difference (300kHz vs 600kHz) requires verification that the application circuit design accommodates the lower frequency specification, particularly regarding inductor and output filter component values.

Q: What is the primary difference between ISL8105AIBZ and ISL8105IBZ?

A: The switching frequency differs: ISL8105AIBZ operates at 600kHz while ISL8105IBZ operates at 300kHz. All other electrical and mechanical parameters remain equivalent.

Q: Are both parts RoHS compliant?

A: Yes, both ISL8105AIBZ and ISL8105IBZ are ROHS3 compliant with identical Moisture Sensitivity Level 3 ratings (168 Hours).

Q: Do both parts support the same supply voltage range?

A: Yes, both parts operate within the 6.5V to 14.4V supply voltage range with identical duty cycle and synchronous rectification capabilities.

Q: What packaging format is used for both parts?

A: Both parts use 8-SOIC Surface Mount packaging with 0.154" width (3.90mm), enabling direct mechanical substitution on PCB layouts designed for this package type.

Q: Are there any temperature operating range differences?

A: No, both parts share the identical operating temperature range of -40°C to 85°C (TA).