AL5811FF-7 Equivalent & Substitute Parts

Part Overview

The AL5811FF-7 is a linear LED driver IC manufactured by Diodes Incorporated, designed for single-output PWM dimming applications with a maximum output current of 75mA. This device operates across a wide supply voltage range of 4.6V to 60V and is actively produced with full RoHS3 compliance. The AL5811FF-7 is packaged in a 6-pin UDFN (3x3mm) with exposed pad, suitable for space-constrained surface mount applications in signage and indicator lighting.

Substitute parts are identified when design requirements demand higher output current capacity, different operating temperature ranges, automotive-grade qualification, or alternative package formats while maintaining core LED driver functionality and PWM dimming capability.

Key Parameters

Parameter	AL5811FF-7
Manufacturer	Diodes Incorporated
Category	Power Management (PMIC)
Type	Linear LED Driver
Number of Outputs	1
Voltage - Supply (Min)	4.6V
Voltage - Supply (Max)	60V
Voltage - Output	1V ~ 60V
Current - Output / Channel	75mA
Dimming	PWM
Operating Temperature	-40°C ~ 125°C (TA)
Package / Case	6-UDFN Exposed Pad
Mounting Type	Surface Mount
Product Status	Active
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the AL5811FF-7 is determined by the following core parameters:

Functional Type: Linear LED driver with single output and PWM dimming capability
Output Current: Minimum 75mA (equal or higher capacity)
Supply Voltage Range: Overlap with 4.6V to 60V input specification
Operating Temperature: Support for -40°C to 125°C range or equivalent industrial/automotive grade
Mounting: Surface mount technology with exposed pad construction
Compliance: RoHS3 compliance and active product status

The identified substitute parts meet these criteria with variations in output current capacity (75mA to 350mA), package format (6-UDFN to 16-TQFN), and thermal ratings. One substitute (NSIC2030JBT3G) functions as a current regulator rather than a dedicated LED driver and operates at significantly lower current (30mA), limiting its applicability to lower-power LED applications.

Parameter Comparison

Parameter	AL5811FF-7	A6260SLJTR-T	IS32LT3175N-GRLA3-TR	MAX16803ATE+T	MAX16839ATT+T	NSIC2030JBT3G
Manufacturer	Diodes Inc.	Allegro MicroSystems	Lumissil Microsystems	Analog Devices/Maxim	Analog Devices/Maxim	onsemi
Type	Linear LED Driver	Linear LED Driver	Linear LED Driver	Linear LED Driver	Linear LED Driver	Current Regulator
Number of Outputs	1	1	1	1	1	N/A
Voltage - Supply (Min)	4.6V	6V	5V	6.5V	5V	N/A
Voltage - Supply (Max)	60V	40V	42V	40V	40V	120V
Current - Output / Channel	75mA	350mA	150mA	350mA	100mA	30mA
Dimming	PWM	PWM	PWM	PWM	PWM	N/A
Operating Temperature	-40°C ~ 125°C (TA)	-20°C ~ 85°C (TA)	-40°C ~ 125°C (TA)	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TA)	-55°C ~ 175°C
Package / Case	6-UDFN Exposed Pad	8-SOIC Exposed Pad	8-SOIC Exposed Pad	16-WQFN Exposed Pad	6-WDFN Exposed Pad	DO-214AA, SMB
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	3 (168 Hours)	3 (168 Hours)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Automotive Grade	No	Yes (AEC-Q100)	Yes (AEC-Q100)	Yes	Yes	No

Engineering Selection Recommendations

Direct Substitutes (Recommended for Pin-Compatible Replacement)

MAX16839ATT+T is the closest functional equivalent to AL5811FF-7, offering identical operating temperature range (-40°C to 125°C), MSL rating of 1 (Unlimited), and RoHS3 compliance. Output current of 100mA exceeds the 75mA requirement. Package format differs (6-TDFN vs. 6-UDFN), requiring PCB layout modification. Automotive qualification is available but not required for non-automotive applications.

Higher Current Capacity Substitutes

A6260SLJTR-T and MAX16803ATE+T both provide 350mA output current for applications requiring higher LED drive capability. A6260SLJTR-T operates at reduced temperature range (-20°C to 85°C) with MSL rating of 3, suitable for non-extended temperature applications. MAX16803ATE+T maintains full -40°C to 125°C range with MSL rating of 1, supporting extended environmental requirements. Both require package redesign and have reduced maximum supply voltage (40V vs. 60V).

Mid-Range Current Substitute

IS32LT3175N-GRLA3-TR provides 150mA output current with full -40°C to 125°C operating range and RoHS3 compliance. Supply voltage maximum of 42V is lower than AL5811FF-7. Automotive AEC-Q100 qualification is included. Package format (8-SOIC) differs from original.

Not Recommended

NSIC2030JBT3G is a current regulator, not a dedicated LED driver, with 30mA maximum output current insufficient for AL5811FF-7 replacement. Functional architecture differs fundamentally from PWM dimming LED drivers.

Frequently Asked Questions (FAQ)

Q: Can MAX16839ATT+T directly replace AL5811FF-7 without circuit modification?

A: Functional replacement is possible, but package format differs (6-TDFN vs. 6-UDFN). PCB footprint and layout must be redesigned. Pin configuration and electrical interface require verification against respective datasheets before implementation.

Q: What is the significance of MSL rating differences between AL5811FF-7 and substitute parts?

A: AL5811FF-7 and MAX16839ATT+T carry MSL rating 1 (Unlimited), allowing indefinite shelf storage without moisture bake-out. A6260SLJTR-T and IS32LT3175N-GRLA3-TR carry MSL rating 3 (168 Hours), requiring moisture bake-out procedures if storage exceeds 168 hours at specified humidity levels. This affects supply chain handling and production scheduling.

Q: Why does A6260SLJTR-T have reduced operating temperature range compared to AL5811FF-7?

A: A6260SLJTR-T operates from -20°C to 85°C (TA), narrower than AL5811FF-7's -40°C to 125°C range. This limits applicability to standard industrial environments. Applications requiring extended temperature operation (-40°C minimum or 125°C maximum) must use MAX16839ATT+T, MAX16803ATE+T, or IS32LT3175N-GRLA3-TR.

Q: Is automotive qualification required for LED driver selection?

A: Automotive qualification (AEC-Q100) is not inherent to AL5811FF-7. Substitute parts A6260SLJTR-T, IS32LT3175N-GRLA3-TR, MAX16803ATE+T, and MAX16839ATT+T include automotive qualification. Selection depends on end-application requirements. Non-automotive signage and indicator applications do not require this certification.

Q: What is the maximum supply voltage limitation for substitute parts?

A: AL5811FF-7 supports 4.6V to 60V supply range. A6260SLJTR-T, IS32LT3175N-GRLA3-TR, MAX16803ATE+T, and MAX16839ATT+T all limit maximum supply to 40V or 42V. Applications requiring operation above 42V supply voltage cannot use these substitutes and must retain AL5811FF-7 or identify alternative sources.

Q: How does output current capacity affect LED application design?

A: AL5811FF-7 provides 75mA maximum output. Higher-current substitutes (150mA to 350mA) support brighter LED arrays or multiple LED strings. Lower-current NSIC2030JBT3G (30mA) is insufficient for AL5811FF-7 replacement. Circuit design must account for actual LED current requirements and thermal dissipation in the selected package.

Q: Are all substitute parts in active production status?

A: All identified substitute parts maintain Active product status with confirmed inventory availability. AL5811FF-7 also remains in active production with 1021 units in stock. Long-term availability is supported across all options.

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