CAT4026V-T1 Equivalent & Substitute Parts

Part Overview

The CAT4026V-T1 is a linear LED driver IC manufactured by onsemi, designed for 6-output applications with analog and PWM dimming capabilities. This device operates within a 4.5V to 5.5V supply range and is packaged in a 28-SOIC configuration. The product is classified as obsolete, making identification of active equivalent parts essential for new designs and production continuity. Substitute parts must maintain functional compatibility across output count, dimming methodology, and thermal operating range while accommodating packaging and supply voltage variations.

Substiute Parts

CAT4026V-T1

onsemiIn Stock: 2413CAT4026V-T1 Datasheet

Current PartRFQ

A6274KLPTR-T

Allegro MicroSystemsIn Stock: 22413A6274KLPTR-T Datasheet

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A6284KLPTR-T

Allegro MicroSystemsIn Stock: 4331A6284KLPTR-T Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the CAT4026V-T1 is based on the following critical parameters:

Functional Equivalence Criteria:

• Number of Outputs: Must equal 6 channels
• Dimming Capability: Must support PWM dimming (analog dimming is optional)
• Type: Must be linear topology
• Internal Switches: Must have no internal switches
• Category: Must be Power Management (PMIC) LED Driver

Electrical Compatibility Criteria:

• Supply Voltage Range: Substitute must accommodate the 4.5V to 5.5V operating window or provide a superset range
• Operating Temperature: Substitute must cover or exceed the -40°C to 85°C range

Physical & Compliance Criteria:

• Mounting Type: Surface Mount required
• RoHS Status: ROHS3 Compliant
• Package compatibility: Different packages acceptable if electrical and functional requirements are met

The A6274KLPTR-T and A6284KLPTR-T from Allegro MicroSystems meet these criteria. Both devices provide 6-output linear LED drivers with PWM dimming, no internal switches, and extended supply voltage ranges (5V to 42V) that encompass the CAT4026V-T1 operating window. Both are active products with automotive-grade qualification (AEC-Q100) and ROHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

Both A6274KLPTR-T and A6284KLPTR-T are suitable substitutes for the obsolete CAT4026V-T1 based on functional and electrical equivalence. Selection between the two Allegro alternatives depends on output current requirements:

A6274KLPTR-T (60mA per channel): Appropriate for applications requiring moderate LED current per output. Provides cost-effective substitution with sufficient current capacity for standard backlight and lighting applications.

A6284KLPTR-T (120mA per channel): Suitable for applications demanding higher per-channel current delivery. Offers double the output current capability of the A6274KLPTR-T while maintaining the same package footprint and pinout compatibility.

Both substitute parts feature extended supply voltage ranges (5V to 42V) that fully encompass the CAT4026V-T1 operating window (4.5V to 5.5V). Both devices carry automotive-grade qualification (AEC-Q100) and ROHS3 compliance, ensuring regulatory and quality standards alignment. The extended operating temperature range (-40°C to 150°C junction temperature) exceeds the original part specification, providing thermal margin for demanding environments.

Package transition from 28-SOIC to 20-TSSOP requires PCB layout modification. The TSSOP package offers reduced footprint and improved thermal performance through the exposed pad design.

Frequently Asked Questions (FAQ)

Q: Can the A6274KLPTR-T or A6284KLPTR-T directly replace the CAT4026V-T1 without design changes?

A: Both Allegro parts are functionally equivalent but require PCB layout redesign due to package change from 28-SOIC to 20-TSSOP. Pinout verification and thermal pad integration are necessary. The electrical interface and dimming control methodology are compatible.

Q: What is the primary difference between A6274KLPTR-T and A6284KLPTR-T?

A: The primary difference is output current per channel: A6274KLPTR-T provides 60mA per channel, while A6284KLPTR-T provides 120mA per channel. Both maintain identical package, pinout, and supply voltage specifications. Selection depends on LED current requirements in your application.

Q: Does the extended supply voltage range (5V to 42V) of the substitute parts affect compatibility with the 4.5V to 5.5V design?

A: No. The extended range is a superset that fully encompasses the original operating window. Designs operating at 4.5V to 5.5V will function identically with either substitute part. The wider range provides flexibility for future applications without component change.

Q: Are there dimming capability differences between the CAT4026V-T1 and substitute parts?

A: The CAT4026V-T1 supports both analog and PWM dimming. The A6274KLPTR-T and A6284KLPTR-T support PWM dimming only. If analog dimming is required, design modification or alternative part selection is necessary.

Q: What is the impact of the MSL rating change from 1 to 2?

A: MSL 1 (Unlimited) allows indefinite shelf storage without moisture bake-out. MSL 2 (1 Year) requires moisture bake-out if storage exceeds one year. Standard manufacturing and assembly processes accommodate MSL 2 components without additional cost or complexity.

Q: Are the substitute parts suitable for automotive applications?

A: Yes. Both A6274KLPTR-T and A6284KLPTR-T carry automotive-grade qualification (AEC-Q100), making them suitable for automotive lighting and backlight applications. The CAT4026V-T1 automotive qualification status is not specified in the provided data.