FAN1585AMX Equivalent & Substitute Parts

Part Overview

The FAN1585AMX is a linear voltage regulator IC from onsemi designed for positive adjustable output applications. It delivers 5A output current in a TO-263-3 surface mount package. The device is classified as obsolete, making identification of functionally equivalent alternatives essential for design continuity and procurement planning. Substitute parts must maintain compatibility across output configuration, adjustability, current rating, and thermal management characteristics.

Substiute Parts

FAN1585AMX

onsemiIn Stock: 5194FAN1585AMX Datasheet

Current PartRFQ

LT1585CM#PBF

Analog Devices Inc.In Stock: 1176LT1585CM#PBF Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the FAN1585AMX is determined by the following critical parameters:

• Output configuration (positive adjustable)
• Output current capability (5A minimum)
• Voltage output range compatibility (1.5V to 3.6V)
• Maximum input voltage rating (18V minimum)
• Dropout voltage performance at rated current
• Surface mount package compatibility (TO-263 family)
• Integrated protection features (over current, over temperature, short circuit)

The LT1585CM#PBF from Analog Devices Inc. qualifies as a substitute based on matching output configuration, adjustable output type, surface mount packaging, and integrated protection features. However, differences in electrical specifications must be evaluated for specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

The LT1585CM#PBF is an active product from Analog Devices Inc., providing supply continuity for the obsolete FAN1585AMX. Both devices share identical output configuration, adjustability, and protection architecture. The LT1585CM#PBF carries RoHS3 compliance, supporting modern regulatory requirements.

Critical differences exist in electrical specifications: the LT1585CM#PBF has a lower maximum input voltage (7V vs. 18V), reduced output current (4.6A vs. 5A), and different output voltage range (1.25V–5.5V vs. 1.5V–3.6V). These differences require application-level evaluation to confirm compatibility. The LT1585CM#PBF supports an extended lower operating temperature range (0°C vs. 25°C minimum).

Both devices use compatible TO-263 D2PAK surface mount packaging, enabling potential PCB layout reuse with minor adjustments.

Frequently Asked Questions (FAQ)

Q: Can the LT1585CM#PBF directly replace the FAN1585AMX without circuit modification?

A: Direct replacement depends on application-specific requirements. Both devices share positive adjustable output configuration and TO-263 packaging. However, the LT1585CM#PBF has lower maximum input voltage (7V vs. 18V) and reduced output current (4.6A vs. 5A). Applications requiring the full 18V input range or 5A output current cannot use this substitute without circuit redesign.

Q: What are the key compatibility criteria for substitution?

A: Substitution requires matching output configuration (positive adjustable), compatible output voltage range, sufficient output current rating, adequate maximum input voltage, and compatible surface mount packaging. Protection features must include over current, over temperature, and short circuit protection.

Q: Are there package compatibility concerns?

A: Both the FAN1585AMX and LT1585CM#PBF use TO-263 D2PAK surface mount packages with three leads plus tab. PCB footprints are mechanically compatible, though thermal performance may vary due to different die designs and internal layouts.

Q: What compliance certifications apply to the LT1585CM#PBF?

A: The LT1585CM#PBF is RoHS3 compliant and REACH unaffected. Both devices carry EAR99 ECCN classification and fall under HTSUS code 8542.39.0001.