FAN2012MPX Equivalent & Substitute Parts

Part Overview

The FAN2012MPX is a buck switching regulator IC manufactured by onsemi, designed for positive adjustable step-down voltage regulation with 1.5A output current capability. This component operates with an input voltage range of 4.5V to 5.5V and provides adjustable output from 0.8V to 5.5V. The device is housed in a 6-WDFN exposed pad package and features synchronous rectification at 1.3MHz switching frequency.

The FAN2012MPX is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or maintenance requirements for systems utilizing this regulator.

Key Parameters

Parameter	FAN2012MPX
Manufacturer	onsemi
Function	Step-Down (Buck)
Output Configuration	Positive
Output Type	Adjustable
Number of Outputs	1
Voltage - Input (Min)	4.5V
Voltage - Input (Max)	5.5V
Voltage - Output (Min/Fixed)	0.8V
Voltage - Output (Max)	5.5V
Current - Output	1.5A
Frequency - Switching	1.3MHz
Synchronous Rectifier	Yes
Operating Temperature	0°C ~ 85°C
Package / Case	6-WDFN Exposed Pad
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the FAN2012MPX is determined by alignment of the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

Function: Step-down (buck) topology
Output Configuration: Positive adjustable output
Number of Outputs: Single output
Output Current Rating: 1.5A minimum
Switching Frequency: 1.3MHz
Synchronous Rectifier: Present

Mechanical Compatibility Criteria:

Package Type: 6-WDFN Exposed Pad (3x3mm footprint)
Mounting Type: Surface Mount

Voltage Range Considerations:

Input voltage range must accommodate the application's supply voltage
Output voltage adjustment range must cover the required output voltage

The XRP6657IHBTR-F manufactured by MaxLinear, Inc. qualifies as a substitute based on matching electrical topology, output current capability, switching frequency, synchronous rectification, package type, and surface mount configuration. Voltage range differences are noted in the parameter comparison table below.

Parameter Comparison

Parameter	FAN2012MPX	XRP6657IHBTR-F
Manufacturer	onsemi	MaxLinear, Inc.
Function	Step-Down	Step-Down
Output Configuration	Positive	Positive
Output Type	Adjustable	Adjustable
Number of Outputs	1	1
Voltage - Input (Min)	4.5V	2.5V
Voltage - Input (Max)	5.5V	5.5V
Voltage - Output (Min/Fixed)	0.8V	0.6V
Voltage - Output (Max)	5.5V	5.5V
Current - Output	1.5A	1.5A
Frequency - Switching	1.3MHz	1.3MHz
Synchronous Rectifier	Yes	Yes
Operating Temperature	0°C ~ 85°C	-40°C ~ 85°C
Package / Case	6-WDFN Exposed Pad	6-WDFN Exposed Pad
Supplier Device Package	6-MLP (3x3)	6-DFN (3x3)
Product Status	Obsolete	Obsolete
RoHS Status	ROHS3 Compliant	RoHS Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	3 (168 Hours)

Engineering Selection Recommendations

Both the FAN2012MPX and XRP6657IHBTR-F are classified as obsolete products. Selection between these parts depends on application-specific requirements:

FAN2012MPX Characteristics:

Input voltage range: 4.5V to 5.5V (narrower range)
Output voltage minimum: 0.8V
Operating temperature: 0°C to 85°C
MSL rating: 1 (Unlimited moisture sensitivity)
RoHS3 compliant

XRP6657IHBTR-F Characteristics:

Input voltage range: 2.5V to 5.5V (wider range, supports lower input voltages)
Output voltage minimum: 0.6V (lower minimum output)
Operating temperature: -40°C to 85°C (extended low-temperature operation)
MSL rating: 3 (168 hours moisture sensitivity)
RoHS compliant

Both devices share identical output current (1.5A), switching frequency (1.3MHz), package footprint (6-WDFN 3x3mm), and synchronous rectification capability. The XRP6657IHBTR-F offers broader input voltage and temperature operating ranges. The FAN2012MPX provides superior moisture handling characteristics (MSL 1 vs. MSL 3).

Frequently Asked Questions (FAQ)

Q: Can the XRP6657IHBTR-F directly replace the FAN2012MPX in existing designs?

A: Direct replacement is possible if the application input voltage remains within 4.5V to 5.5V and the required output voltage range is 0.8V to 5.5V. The 6-WDFN package footprints are identical (3x3mm). PCB layout and thermal management considerations should be evaluated, as both devices have exposed pads for thermal dissipation.

Q: What are the key differences between these parts?

A: The primary differences are input voltage range (FAN2012MPX: 4.5-5.5V vs. XRP6657IHBTR-F: 2.5-5.5V), minimum output voltage (0.8V vs. 0.6V), operating temperature range (0-85°C vs. -40-85°C), and moisture sensitivity level (MSL 1 vs. MSL 3). Both maintain identical output current, switching frequency, and package type.

Q: Are there any compliance or certification differences?

A: The FAN2012MPX is ROHS3 compliant, while the XRP6657IHBTR-F is RoHS compliant. Both carry EAR99 ECCN classification and share the same HTSUS code (8542.39.0001). Compliance requirements for your specific application should be verified.

Q: What does MSL 3 (168 Hours) mean for the XRP6657IHBTR-F?

A: MSL 3 indicates the component can be exposed to moisture for up to 168 hours at specified temperature and humidity conditions before soldering. The FAN2012MPX with MSL 1 has unlimited moisture exposure tolerance. Storage and handling conditions should follow manufacturer guidelines for each part.

Q: Are both parts still available for purchase?

A: Both the FAN2012MPX and XRP6657IHBTR-F are classified as obsolete. Availability through authorized distributors should be confirmed before design decisions are finalized.

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