EN6310QI Equivalent & Substitute Parts

Part Overview

The EN6310QI is a buck switching regulator IC from Intel's Enpirion series, designed for positive adjustable output applications. This surface mount component delivers 1A output current with an adjustable voltage range from 0.6V to 3.3V, operating from a 2.7V to 5.5V input supply. The device features synchronous rectification and operates at a 2.2MHz switching frequency within a -40°C to 85°C temperature range.

The EN6310QI is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production requirements for applications utilizing this regulator topology.

Key Parameters

Parameter	Value
Function	Step-Down (Buck)
Output Configuration	Positive
Output Type	Adjustable
Number of Outputs	1
Voltage - Input Range	2.7V to 5.5V
Voltage - Output Range	0.6V to 3.3V
Current - Output	1A
Frequency - Switching	2.2MHz
Synchronous Rectifier	Yes
Operating Temperature	-40°C to 85°C
Mounting Type	Surface Mount
Package / Case	30-FQFN Exposed Pad
RoHS Status	RoHS Compliant

Substitute Part Grouping Explanation

Substitute parts for the EN6310QI are selected based on functional equivalence within the following critical parameters:

Topology & Function: Step-down (buck) switching regulator with positive adjustable output
Output Voltage Range: Minimum 0.6V to maximum 3.3V adjustable capability
Input Voltage Range: 2.7V to 5.5V operation
Output Current: Minimum 1A capability
Switching Frequency: Approximately 2.2MHz to 2.5MHz range
Synchronous Rectification: Integrated synchronous rectifier required
Temperature Range: -40°C to 85°C minimum
Mounting: Surface mount configuration
Compliance: RoHS compliant

Two substitute parts meet these criteria with varying package configurations and enhanced specifications.

Parameter Comparison

Parameter	EN6310QI	FAN53741UC108X	MYRGP120100W21RA
Manufacturer	Intel	Fairchild Semiconductor	Murata Power Solutions Inc.
Function	Step-Down	Step-Down	Step-Down
Output Configuration	Positive	Positive	Positive
Output Type	Adjustable	Adjustable	Fixed (1.2V)
Number of Outputs	1	1	1
Voltage - Input (Min)	2.7V	2.3V	2.5V
Voltage - Input (Max)	5.5V	5.5V	5.5V
Voltage - Output (Min/Fixed)	0.6V	0.6V	1.2V
Voltage - Output (Max)	3.3V	3.3V	1.2V
Current - Output	1A	1.3A	1A
Frequency - Switching	2.2MHz	2.5MHz	Not specified
Synchronous Rectifier	Yes	Yes	Not specified
Operating Temperature	-40°C to 85°C	-40°C to 85°C	-40°C to 105°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	30-FQFN Exposed Pad	6-UFBGA, WLCSP	8-PowerTDFN Module
Product Status	Obsolete	Active	Obsolete
RoHS Status	RoHS Compliant	Not specified	ROHS3 Compliant

Engineering Selection Recommendations

FAN53741UC108X is the primary substitute for the EN6310QI. This Fairchild Semiconductor device maintains active product status, ensuring ongoing availability and manufacturer support. The FAN53741UC108X exceeds the EN6310QI specifications with 1.3A output current versus 1A, identical adjustable output voltage range (0.6V to 3.3V), and matching input voltage range (2.3V to 5.5V minimum input is superior). The switching frequency of 2.5MHz is within acceptable tolerance of the original 2.2MHz. Both devices feature synchronous rectification and identical operating temperature range. The primary design consideration is the package change from 30-FQFN to 6-WLCSP, which requires PCB layout modification.

MYRGP120100W21RA is a secondary substitute option with significant functional differences. This Murata Power Solutions non-isolated PoL module provides fixed 1.2V output rather than adjustable voltage, limiting its applicability to designs requiring this specific output voltage. The device operates across the same input range (2.5V to 5.5V) and delivers 1A output current. Extended operating temperature range (-40°C to 105°C) provides thermal margin. Product status is obsolete, similar to the EN6310QI. This substitute is suitable only for applications with fixed 1.2V output requirements.

Frequently Asked Questions (FAQ)

Q: Can the FAN53741UC108X directly replace the EN6310QI without design changes?

A: The FAN53741UC108X provides functional equivalence in topology, output voltage range, and current capability. However, the package change from 30-FQFN to 6-WLCSP requires PCB layout redesign. Pin configuration and thermal management approach differ between packages.

Q: What are the key differences between the EN6310QI and FAN53741UC108X?

A: The FAN53741UC108X offers higher output current (1.3A versus 1A), slightly higher switching frequency (2.5MHz versus 2.2MHz), and lower minimum input voltage (2.3V versus 2.7V). The primary difference is package format: 30-FQFN versus 6-WLCSP. The FAN53741UC108X maintains active product status.

Q: Is the MYRGP120100W21RA suitable as a general replacement?

A: The MYRGP120100W21RA is not a general replacement due to fixed 1.2V output voltage. It is applicable only to designs requiring this specific output voltage. The EN6310QI and FAN53741UC108X both provide adjustable output voltage from 0.6V to 3.3V.

Q: What compliance certifications apply to these parts?

A: The EN6310QI is RoHS Compliant. The MYRGP120100W21RA is ROHS3 Compliant. All three parts carry ECCN EAR99 and HTSUS 8542.39.0001 classifications.

Q: How does the package change affect thermal performance?

A: The EN6310QI uses a 30-FQFN package with exposed pad for thermal dissipation. The FAN53741UC108X uses a 6-WLCSP package, which is significantly smaller. Thermal performance must be evaluated based on specific application power dissipation and PCB thermal design.

Q: Are there inventory considerations for these substitutes?

A: The FAN53741UC108X is available in active production with 61,400 pieces in stock. The EN6310QI and MYRGP120100W21RA are both obsolete products with limited remaining inventory (2,274 and 3,857 pieces respectively).

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