FAN1585AT Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The FAN1585AT is a linear voltage regulator IC manufactured by onsemi, designed for positive adjustable output applications requiring 5A current capacity in a TO-220-3 package. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement continuity. The FAN1585AT provides adjustable output voltage regulation from 1.5V to 3.6V with integrated protection features including over-current, over-temperature, and short-circuit protection.

Substiute Parts

FAN1585AT

onsemiIn Stock: 1170FAN1585AT Datasheet

Current PartRFQ

LT1585CT#PBF

Analog Devices Inc.In Stock: 1610LT1585CT#PBF Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the FAN1585AT are identified based on the following critical parameters that determine functional equivalence:

Primary Matching Criteria:

• Package / Case: TO-220-3 (mechanical and thermal compatibility)
• Output Configuration: Positive adjustable output
• Number of Regulators: Single output
• Mounting Type: Through Hole
• Protection Features: Over-current, over-temperature, and short-circuit protection

Secondary Compatibility Factors:

• Output voltage range overlap (minimum 1.5V capability)
• Current output capacity (minimum 4.6A acceptable for 5A applications with thermal management consideration)
• Input voltage maximum rating (minimum 7V acceptable for applications within 7V limit)
• Operating temperature range (0°C ~ 125°C acceptable for extended industrial applications)

The LT1585CT#PBF from Analog Devices Inc. meets these substitution criteria while maintaining active product status and full compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The LT1585CT#PBF is the qualified substitute for the obsolete FAN1585AT based on the following engineering factors:

Product Status & Availability: The LT1585CT#PBF maintains active product status with confirmed inventory availability (1529 Pcs), ensuring long-term procurement reliability compared to the obsolete FAN1585AT.

Compliance & Certifications: The LT1585CT#PBF is ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for new designs and manufacturing. Both parts share identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications.

Mechanical & Thermal Compatibility: Both parts use identical TO-220-3 packaging with through-hole mounting, enabling direct PCB layout compatibility without redesign.

Functional Equivalence: Both regulators provide positive adjustable output with identical protection features (over-current, over-temperature, short-circuit). The LT1585CT#PBF extends the operating temperature range to 0°C, supporting broader industrial applications.

Application-Specific Considerations: The LT1585CT#PBF input voltage maximum of 7V is lower than the FAN1585AT's 18V rating. Applications requiring input voltages exceeding 7V require alternative solutions. The LT1585CT#PBF output current of 4.6A is 0.4A lower than the FAN1585AT's 5A rating; thermal management analysis is required for applications operating continuously at maximum current.

Frequently Asked Questions (FAQ)

Q: Can the LT1585CT#PBF directly replace the FAN1585AT without PCB modifications?

A: Yes, the LT1585CT#PBF uses identical TO-220-3 packaging and pin configuration, enabling direct substitution on existing PCBs. No layout changes are required.

Q: What is the impact of the LT1585CT#PBF's 7V maximum input voltage versus the FAN1585AT's 18V rating?

A: The LT1585CT#PBF is suitable only for applications where the input voltage does not exceed 7V. Designs requiring higher input voltages must identify alternative regulators with higher input voltage ratings.

Q: Is the 0.4A difference in output current (4.6A vs 5A) significant for substitution?

A: The difference is application-dependent. For designs operating continuously at or near 5A, thermal analysis is required to confirm the LT1585CT#PBF can dissipate the required power within acceptable junction temperature limits. For applications operating below 4.6A, the difference is not significant.

Q: Are there pin-to-pin compatibility concerns between these parts?

A: Both parts use TO-220-3 packaging with standard pin assignments for linear regulators (input, output, ground). Pin compatibility is confirmed.

Q: What compliance advantages does the LT1585CT#PBF offer?

A: The LT1585CT#PBF is ROHS3 compliant, meeting current environmental regulations for new product designs and manufacturing. The FAN1585AT's compliance status is not specified.

Q: Does the LT1585CT#PBF support the full output voltage range of the FAN1585AT?

A: The LT1585CT#PBF supports a wider output voltage range (1.25V to 5.5V) compared to the FAN1585AT (1.5V to 3.6V), providing greater flexibility for adjustable output applications.