SC613IMLTRT LED Driver IC Equivalent & Substitute Parts

Part Overview

The SC613IMLTRT is a Semtech Corporation LED Driver IC featuring a switched capacitor (charge pump) topology with 140mA output capability, designed for backlight applications. This part is classified as obsolete, necessitating identification of functionally equivalent alternatives for new designs and production continuity. The device operates across a 2.5V to 6.5V supply range and delivers regulated output in the 4.275V to 4.725V range at 650kHz switching frequency.

Substiute Parts

SC613IMLTRT

Semtech CorporationIn Stock: 23243SC613IMLTRT Datasheet

Current PartRFQ

LT3517HUF#TRPBF

Linear TechnologyIn Stock: 4479LT3517HUF#TRPBF Datasheet

MFR RecommendedRFQ

LTC3201EMS#PBF

Analog Devices Inc.In Stock: 1401LTC3201EMS#PBF Datasheet

MFR RecommendedRFQ

LTC3218EDDB#TRPBF

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

MFR RecommendedRFQ

NCV3066MNTXG

onsemiIn Stock: 1760NCV3066MNTXG Datasheet

MFR RecommendedRFQ

TB62763FMG,8,EL

Toshiba Semiconductor and StorageIn Stock: 1081TB62763FMG,8,EL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SC613IMLTRT is determined by the following critical parameters:

Primary Substitution Criteria:

• Topology: Switched Capacitor (Charge Pump) topology is the primary determinant for direct substitution
• Output Current: Minimum 140mA capability required
• Supply Voltage Range: Compatibility with 2.5V to 6.5V input range
• Output Voltage: Regulated output in the 4.275V to 4.725V range
• Package Type: Surface mount packages with exposed pad
• Operating Temperature: -40°C to 85°C minimum range
• RoHS Compliance: Preferred for regulatory alignment

Secondary Substitution Criteria (Topology Variants):

• Step-Down/Step-Up (Buck-Boost) topologies with equivalent output current and voltage regulation capability
• Flexible output voltage programming within or exceeding the original output range
• Dimming capability (Analog or PWM) for enhanced application flexibility

The substitute parts listed below are grouped into two categories: direct topology matches (Switched Capacitor) and functional equivalents with alternative topologies that meet or exceed the electrical performance requirements.

Parameter Comparison

Engineering Selection Recommendations

Direct Topology Substitutes (Switched Capacitor Charge Pump):

LTC3218EDDB#TRPBF (Analog Devices) is the primary recommended substitute. This part maintains identical topology with 150mA output current capability, exceeding the original 140mA specification. Product status is active with ROHS3 compliance, ensuring long-term availability and regulatory alignment. Output voltage is specified at 5.3V, within acceptable range for backlight applications. Package footprint (10-WFDFN) is compatible with the original 10-VFDFN layout.

LTC3201EMS#PBF (Analog Devices) provides an alternative charge pump solution with 100mA output current. This part is active and ROHS3 compliant. The reduced current rating (100mA versus 140mA) limits applicability to lower-power backlight designs. Operating frequency of 1.8MHz provides improved efficiency characteristics.

Functional Equivalents (Alternative Topologies):

LT3517HUF#TRPBF (Linear Technology) employs step-down/step-up topology with 1.5A switch current and programmable output voltage (2V to 45V range). This part is obsolete but offers superior current handling and voltage flexibility. RoHS non-compliance status requires regulatory review. Extended temperature range (-40°C to 150°C) supports demanding thermal environments.

NCV3066MNTXG (onsemi) provides step-down/step-up topology with 1.5A switch current and analog/PWM dimming capability. Product status is active with ROHS3 compliance. Extended supply voltage range (3V to 40V) and operating temperature (-40°C to 125°C) support diverse application requirements. Reduced package size (8-DFN) offers board space advantages.

TB62763FMG,8,EL (Toshiba) implements step-up boost topology with 80mA output current and 200kHz to 2MHz frequency range. Product status is active with ROHS3 compliance. Current rating (80mA) is below original specification, limiting use to reduced-power applications. Compact 8-SON package provides miniaturization benefits.

Compliance Considerations:

Parts with ROHS3 compliance (LTC3218EDDB#TRPBF, LTC3201EMS#PBF, NCV3066MNTXG, TB62763FMG,8,EL) are preferred for new designs. LT3517HUF#TRPBF requires regulatory assessment due to RoHS non-compliance status.

Frequently Asked Questions (FAQ)

Q: Can LTC3218EDDB#TRPBF directly replace SC613IMLTRT without circuit modifications?

A: LTC3218EDDB#TRPBF maintains the same switched capacitor topology and operates within compatible voltage ranges. Package footprint (10-WFDFN) is mechanically similar to the original 10-VFDFN. Pin-level compatibility requires verification against detailed datasheets. Output voltage specification (5.3V) is within acceptable backlight operating range. Circuit validation is recommended prior to production implementation.

Q: Why is LTC3201EMS#PBF listed as a substitute if its output current (100mA) is lower than the original 140mA?

A: LTC3201EMS#PBF qualifies as a substitute for applications with reduced current requirements. The 100mA rating is sufficient for lower-brightness backlight designs or reduced-load scenarios. This part maintains identical charge pump topology and RoHS3 compliance. Selection depends on specific application current demands.

Q: What are the advantages of step-down/step-up topology alternatives over charge pump designs?

A: Step-down/step-up (buck-boost) topologies offer programmable output voltage across wider ranges (LT3517HUF#TRPBF: 2V to 45V; NCV3066MNTXG: unspecified but flexible). These designs support higher output currents (1.5A switch current) and provide dimming capability (analog or PWM). Trade-offs include increased component count and circuit complexity compared to charge pump simplicity.

Q: Is package compatibility critical for substitution?

A: Package compatibility affects PCB layout and assembly feasibility. SC613IMLTRT uses 10-VFDFN (3x3mm) exposed pad package. LTC3218EDDB#TRPBF uses 10-WFDFN (3x2mm), requiring minor layout adjustment. LTC3201EMS#PBF uses 10-MSOP, necessitating significant PCB redesign. NCV3066MNTXG (8-DFN) and TB62763FMG,8,EL (8-SON) require substantial layout changes. Package selection impacts development timeline and manufacturing cost.

Q: Which substitute offers the best long-term availability?

A: LTC3218EDDB#TRPBF, LTC3201EMS#PBF, NCV3066MNTXG, and TB62763FMG,8,EL all carry active product status with ROHS3 compliance, indicating manufacturer commitment to continued production and supply. LT3517HUF#TRPBF is obsolete, presenting potential future availability constraints.

Q: Are there thermal considerations when selecting substitutes?

A: Operating temperature ranges vary across substitutes. SC613IMLTRT specifies -40°C to 85°C (TA, ambient). LT3517HUF#TRPBF extends to -40°C to 150°C (TJ, junction), supporting higher-temperature environments. NCV3066MNTXG reaches -40°C to 125°C (TJ). Applications in thermally constrained environments should prioritize parts with extended temperature specifications.