SP6686ER-L/TR LED Driver IC Equivalent & Substitute Parts

Part Overview

The SP6686ER-L/TR is a switched capacitor LED driver regulator manufactured by MaxLinear, Inc., designed for single-output applications requiring 400mA flash current capability. This device operates across a 2.7V to 5.5V supply range and is packaged in a 10-DFN (3x3) form factor with exposed pad. The part is classified as Last Time Buy, indicating end-of-life status. Equivalent and substitute parts are necessary to ensure design continuity, maintain supply chain flexibility, and support long-term product availability for applications requiring LED driver functionality in backlight and camera flash systems.

Substiute Parts

SP6686ER-L/TR

MaxLinear, Inc.In Stock: 20663SP6686ER-L/TR Datasheet

Current PartRFQ

IS31BL3232-DLS2-TR

Lumissil MicrosystemsIn Stock: 1084IS31BL3232-DLS2-TR Datasheet

DirectRFQ

BU90030G-TR

Rohm SemiconductorIn Stock: 3459BU90030G-TR Datasheet

MFR RecommendedRFQ

LT3956IUHE#TRPBF

Analog Devices Inc.In Stock: 1150LT3956IUHE#TRPBF Datasheet

MFR RecommendedRFQ

LTC3214EDD#PBF

Analog Devices Inc.In Stock: 2012LTC3214EDD#PBF Datasheet

MFR RecommendedRFQ

LTC3218EDDB#TRPBF

Analog Devices Inc.In Stock: 1963LTC3218EDDB#TRPBF Datasheet

MFR RecommendedRFQ

MIC3201YME-TR

Microchip TechnologyIn Stock: 22932MIC3201YME-TR Datasheet

MFR RecommendedRFQ

MP3308DL-LF-P

Monolithic Power Systems Inc.In Stock: 948MP3308DL-LF-P Datasheet

MFR RecommendedRFQ

MP3416GQH-P

Monolithic Power Systems Inc.In Stock: 781MP3416GQH-P Datasheet

MFR RecommendedRFQ

RT9285CGQW

Richtek USA Inc.In Stock: 3412RT9285CGQW Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution logic for the SP6686ER-L/TR is based on the following critical parameters: topology (switched capacitor charge pump), single output configuration, supply voltage range (2.7V to 5.5V), output current capability (400mA flash), package form factor (10-DFN 3x3), and surface mount mounting type. Substitute parts must maintain compatibility across these electrical and mechanical specifications to ensure functional equivalence in LED driver applications.

The substitute parts are grouped into two categories:

Direct Topology Substitutes (Switched Capacitor Charge Pump): Parts maintaining identical topology and similar electrical performance within the 2.7V to 5.5V supply range and 10-DFN package family.

Alternative Topology Substitutes: Parts with different topologies (step-down, step-up, flyback, SEPIC) that provide LED driver functionality but require design verification for voltage and current compatibility.

Parameter Comparison

Engineering Selection Recommendations

IS31BL3232-DLS2-TR (Lumissil Microsystems): Direct topology equivalent with switched capacitor charge pump architecture. Maintains 2.7V to 5.5V supply range and 10-DFN (3x3) package compatibility. Provides higher output current (1.2A flash) compared to SP6686ER-L/TR (400mA flash). Product status is Active with ROHS3 compliance and unlimited MSL rating. Suitable for applications requiring increased current capacity within identical supply voltage and package constraints.

LTC3214EDD#PBF (Analog Devices Inc.): Switched capacitor charge pump topology with 2.9V to 4.5V supply range and 500mA output current. Packaged in 10-WFDFN exposed pad (10-DFN 3x3 compatible footprint). Operating temperature range -40°C to 85°C matches SP6686ER-L/TR. Product status is Active with ROHS3 compliance. Suitable for designs where supply voltage remains within 2.9V to 4.5V window and 500mA current is acceptable.

LTC3218EDDB#TRPBF (Analog Devices Inc.): Switched capacitor charge pump with 2.9V to 4.5V supply range and 150mA output current. 10-WFDFN package (10-DFN 3x2 footprint). Product status is Active with ROHS3 compliance. Applicable only for lower-current LED driver applications where 150mA output is sufficient.

MIC3201YME-TR (Microchip Technology): Step-down buck topology with 6V to 20V supply range and 1A switch current. 8-SOIC-EP package differs from SP6686ER-L/TR footprint. Operating temperature range extends to 125°C (TJ). Product status is Active with ROHS3 compliance and MSL-2 rating. Requires design modification due to different topology and supply voltage requirements. Suitable for higher input voltage applications with PWM dimming capability.

RT9285CGQW (Richtek USA Inc.): Step-up boost topology with 2.7V to 5.5V supply range and 400mA switch current. 8-WFDFN package differs from SP6686ER-L/TR. Maintains identical supply voltage range and current rating. Product status is Active with ROHS3 compliance. Requires design verification due to different topology and package form factor. Suitable for applications requiring boost conversion within matching supply and current specifications.

Frequently Asked Questions (FAQ)

Q: Can IS31BL3232-DLS2-TR directly replace SP6686ER-L/TR without PCB modification?

A: IS31BL3232-DLS2-TR maintains the same 10-DFN (3x3) package footprint and switched capacitor topology. Pin-to-pin compatibility requires verification against device datasheets. The higher output current (1.2A vs 400mA) is backward compatible for applications requiring 400mA or less. No PCB layout modification is necessary if pin assignments are identical.

Q: What is the primary difference between switched capacitor and step-down topologies for LED driver applications?

A: Switched capacitor (charge pump) topology uses capacitive energy transfer without inductors, resulting in smaller form factors and lower EMI. Step-down (buck) topology uses inductive energy storage, enabling higher efficiency at higher input voltages. SP6686ER-L/TR uses switched capacitor; MIC3201YME-TR uses step-down. Topology selection depends on input voltage range, efficiency requirements, and PCB space constraints.

Q: Are all substitute parts RoHS compliant?

A: All listed substitute parts carry ROHS3 compliance certification. SP6686ER-L/TR carries RoHS Compliant status. Both certifications meet current environmental regulations for electronic components.

Q: Which substitute part is recommended for applications with supply voltage below 2.9V?

A: IS31BL3232-DLS2-TR and RT9285CGQW both support 2.7V minimum supply voltage, matching SP6686ER-L/TR specification. LTC3214EDD#PBF and LTC3218EDDB#TRPBF require minimum 2.9V supply and are not suitable for sub-2.9V applications.

Q: What is the impact of package differences between SP6686ER-L/TR and substitute parts?

A: SP6686ER-L/TR uses 10-VFDFN package. IS31BL3232-DLS2-TR, LTC3214EDD#PBF, and LTC3218EDDB#TRPBF use 10-WFDFN packages with compatible 10-DFN (3x3) footprints. MIC3201YME-TR uses 8-SOIC-EP and RT9285CGQW uses 8-WFDFN, requiring PCB redesign. Footprint compatibility must be verified in component datasheets before selection.

Q: Can LTC3218EDDB#TRPBF be used in applications originally designed for SP6686ER-L/TR?

A: LTC3218EDDB#TRPBF provides only 150mA output current versus SP6686ER-L/TR's 400mA. Substitution is valid only if application current requirements do not exceed 150mA. Supply voltage range (2.9V to 4.5V) is narrower than SP6686ER-L/TR (2.7V to 5.5V). Design verification is required to confirm current and voltage compatibility.

Q: What does "Last Time Buy" status mean for SP6686ER-L/TR?

A: Last Time Buy indicates the manufacturer has discontinued production and no further stock will be manufactured. Existing inventory is available for final purchases. Transition to an active substitute part is necessary for long-term product support and future production runs.