FAN6520AMX Buck Regulator Controller - Equivalent & Substitute Parts

Part Overview

The FAN6520AMX is a buck regulator positive output step-down DC-DC controller IC manufactured by onsemi in 8-SOIC packaging. This component functions as a transistor driver for single-output, single-phase buck topology applications with a 300kHz switching frequency and 100% maximum duty cycle. The FAN6520AMX is classified as obsolete, making identification of active equivalent parts essential for new designs and ongoing production support.

Substiute Parts

FAN6520AMX

onsemiIn Stock: 17971FAN6520AMX Datasheet

Current PartRFQ

ISL6520ACBZ-T

Renesas Electronics CorporationIn Stock: 3215ISL6520ACBZ-T Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FAN6520AMX is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Criteria:

• Output type: Transistor Driver
• Function: Step-Down
• Output configuration: Positive
• Topology: Buck
• Number of outputs: 1
• Output phases: 1
• Supply voltage range: 4.5V ~ 5.5V
• Switching frequency: 300kHz
• Maximum duty cycle: 100%
• Synchronous rectifier capability: Yes
• Operating temperature range: 0°C ~ 70°C (TA)

Mechanical Equivalence Criteria:

• Mounting type: Surface Mount
• Package type: 8-SOIC
• Package dimensions: 0.154" width (3.90mm)

The ISL6520ACBZ-T from Renesas Electronics Corporation meets all electrical and mechanical equivalence requirements and is classified as an active product, making it a direct parametric substitute for the obsolete FAN6520AMX.

Parameter Comparison

Engineering Selection Recommendations

The ISL6520ACBZ-T is the direct parametric equivalent for the obsolete FAN6520AMX. Selection of this substitute is based on:

Product Status: The FAN6520AMX is obsolete, while the ISL6520ACBZ-T is active and in production, ensuring long-term availability and supply chain continuity.

Compliance: The ISL6520ACBZ-T is ROHS3 compliant, meeting current environmental and regulatory requirements. Both parts share identical REACH status (REACH Unaffected) and ECCN classification (EAR99).

Electrical and Mechanical Compatibility: All critical parameters—supply voltage, switching frequency, duty cycle, synchronous rectifier capability, operating temperature range, and 8-SOIC package dimensions—are identical between the two parts.

Packaging Format: The ISL6520ACBZ-T is available in Cut Tape (CT) and Digi-Reel® packaging, providing flexibility for both prototype and production environments.

Frequently Asked Questions (FAQ)

Q: Can the ISL6520ACBZ-T directly replace the FAN6520AMX in existing designs?

A: Yes. The ISL6520ACBZ-T meets all electrical and mechanical specifications of the FAN6520AMX. Both parts operate at 4.5V ~ 5.5V supply voltage, 300kHz switching frequency, 100% maximum duty cycle, and use identical 8-SOIC packaging. No circuit modifications are required.

Q: What is the primary reason for substituting the FAN6520AMX?

A: The FAN6520AMX is classified as obsolete. The ISL6520ACBZ-T is an active product from Renesas Electronics Corporation, ensuring continued availability and manufacturing support.

Q: Are there packaging differences between these parts?

A: Both parts use 8-SOIC surface mount packaging with identical dimensions (0.154" width, 3.90mm). The ISL6520ACBZ-T is supplied in Cut Tape (CT) and Digi-Reel® formats, while the FAN6520AMX packaging format is not specified.

Q: Do both parts have the same moisture sensitivity rating?

A: Yes. Both the FAN6520AMX and ISL6520ACBZ-T have MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions.

Q: What compliance certifications apply to the ISL6520ACBZ-T?

A: The ISL6520ACBZ-T is ROHS3 compliant and REACH unaffected. Both parts share the same ECCN classification (EAR99) and HTSUS code structure for regulatory purposes.

Q: Are the control features identical between these parts?

A: The FAN6520AMX features Enable control, while the ISL6520ACBZ-T features Phase Control. Both parts provide the necessary control functionality for buck regulator applications, though the specific control mechanism differs.