SC600BIMSTRT LED Driver IC Equivalent & Substitute Parts

Part Overview

The SC600BIMSTRT is a Semtech Corporation LED Driver IC featuring a switched capacitor (charge pump) topology with 120mA output capability, designed for backlight applications. Operating across a 2.5V to 6.5V supply range with a fixed 5V output, this component delivers regulated power for LED backlighting systems. The part is classified as obsolete, necessitating identification of functionally equivalent alternatives that maintain compatibility with existing designs while offering active product status and continued manufacturer support.

Substiute Parts

SC600BIMSTRT

Semtech CorporationIn Stock: 22846SC600BIMSTRT Datasheet

Current PartRFQ

LM2758TLX/NOPB

National SemiconductorIn Stock: 2511LM2758TLX/NOPB Datasheet

MFR RecommendedRFQ

LM3402MM/NOPB

Texas InstrumentsIn Stock: 18090LM3402MM/NOPB Datasheet

MFR RecommendedRFQ

LM3402MR/NOPB

Texas InstrumentsIn Stock: 2354LM3402MR/NOPB Datasheet

MFR RecommendedRFQ

LM3410YMYE/NOPB

Texas InstrumentsIn Stock: 2837LM3410YMYE/NOPB Datasheet

MFR RecommendedRFQ

LT3519IMS#TRPBF

Analog Devices Inc.In Stock: 3224LT3519IMS#TRPBF Datasheet

MFR RecommendedRFQ

LTC3202EDD

Analog Devices Inc.In Stock: 10559LTC3202EDD Datasheet

MFR RecommendedRFQ

MAX1561ETA+T

Analog Devices Inc./Maxim IntegratedIn Stock: 17706MAX1561ETA+T Datasheet

MFR RecommendedRFQ

NCP5007SNT1G

onsemiIn Stock: 15892NCP5007SNT1G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SC600BIMSTRT requires matching on the following critical parameters: single output DC DC regulator topology, backlight application suitability, surface mount packaging, and output current capability within acceptable design margins. The primary substitution criterion is topology compatibility—the original part uses switched capacitor (charge pump) regulation, which is preferred for low-voltage, low-current backlight drivers due to minimal external component requirements and high efficiency at fixed output voltages.

Substitute parts are grouped into two categories:

Category A: Switched Capacitor (Charge Pump) Topology — Direct topology match offering the same regulation principle. These parts maintain the charge pump architecture and are suitable for designs where the original topology is specified or preferred.

Category B: Alternative Topologies (Step-Up/Boost, Step-Down/Buck, SEPIC) — Parts with different regulation topologies but compatible output specifications, current ratings, and backlight application focus. These substitutes require design review to confirm compatibility with existing power supply and load characteristics.

Key parameters determining substitution eligibility:

• Output voltage range compatibility (5V nominal or adjustable to 5V)
• Output current capability (≥120mA minimum)
• Supply voltage range overlap (minimum 2.5V to 6.5V input tolerance)
• Backlight application classification
• Surface mount package availability
• Operating temperature range (-40°C minimum)

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: LTC3202EDD

The LTC3202EDD represents the closest functional equivalent to the SC600BIMSTRT. Both devices employ switched capacitor (charge pump) topology, operate within overlapping supply voltage ranges (2.7V to 4.5V for LTC3202EDD versus 2.5V to 6.5V for SC600BIMSTRT), and deliver comparable output current (125mA versus 120mA). The LTC3202EDD maintains active product status with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1). The 10-DFN package provides a compact surface mount footprint suitable for backlight applications. PWM dimming capability adds functional enhancement over the original part.

Secondary Recommendation: LM3410YMYE/NOPB

The LM3410YMYE/NOPB offers SEPIC and step-up (boost) topology with 2.8A switch current capability, supporting backlight applications across a 2.7V to 5.5V supply range. This part provides higher current capacity and extended output voltage range (3V to 24V), enabling flexibility in design configurations. Active product status, ROHS3 compliance, and unlimited MSL rating ensure long-term availability and environmental compliance. The 8-HVSSOP package accommodates space-constrained designs.

Alternative Recommendation: MAX1561ETA+T

The MAX1561ETA+T delivers step-up (boost) topology with 950mA switch current and dual dimming modes (analog and PWM). Supply range compatibility (2.6V to 5.5V) and backlight application focus align with original design intent. Active product status and ROHS3 compliance support production continuity. The 8-TDFN package provides compact integration.

Obsolete Part Note: NCP5007SNT1G

While NCP5007SNT1G shares backlight application classification and step-up topology, its obsolete product status and reduced current capability (50mA) make it unsuitable as a primary replacement. This part should not be selected for new designs.

Topology Consideration: LM3402MR/NOPB and LT3519IMS#TRPBF

These parts employ alternative topologies (step-down buck and multi-topology SEPIC/buck/boost respectively) with higher current ratings and extended supply voltage ranges. Selection requires design review to confirm compatibility with existing power supply architecture and load characteristics. Both maintain active status and ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Why is the SC600BIMSTRT obsolete, and what does this mean for my design?

A: Obsolete status indicates the manufacturer has discontinued production and support. Existing inventory may be limited or unavailable. Transitioning to an active substitute part ensures access to current manufacturing, technical support, and compliance certifications. Active alternatives listed in this document provide equivalent or enhanced functionality.

Q: Can I directly replace SC600BIMSTRT with LTC3202EDD without circuit modifications?

A: LTC3202EDD shares the same switched capacitor topology and comparable electrical specifications (120mA vs. 125mA output current, overlapping supply ranges). However, package differences (10-DFN versus 10-MSOP) require PCB layout revision. Verify output voltage configuration and dimming requirements before implementation.

Q: What is the difference between switched capacitor (charge pump) and step-up (boost) topologies?

A: Switched capacitor topology uses capacitive energy transfer with fixed output voltage ratios, ideal for low-current, fixed-output applications with minimal external components. Step-up (boost) topology uses inductive energy storage with adjustable output voltage, offering higher current capability and flexibility but requiring additional external components. Both are suitable for backlight applications; topology selection depends on design requirements.

Q: Does output current rating determine substitution compatibility?

A: Output current rating is a critical parameter. The substitute part must deliver at least the original part's current specification (120mA minimum). Parts with higher ratings (e.g., 500mA, 950mA) provide design margin and are acceptable. Parts with lower ratings (e.g., 50mA) are unsuitable unless design requirements are reduced.

Q: Are package differences significant when selecting a substitute?

A: Yes. Package differences require PCB redesign, including footprint changes, trace routing, and thermal management adjustments. 10-MSOP and 10-DFN packages have different pinouts and thermal characteristics. Verify package compatibility with existing PCB layout before committing to a substitute part.

Q: What does ROHS3 compliance mean, and why does it matter?

A: ROHS3 compliance certifies that the part meets Restriction of Hazardous Substances Directive requirements, restricting lead, cadmium, mercury, and other hazardous materials. This certification is mandatory for products sold in the European Union and increasingly required globally. All active substitute parts listed maintain ROHS3 compliance, ensuring regulatory compatibility.

Q: Can I use LM3402MR/NOPB as a direct replacement despite its step-down (buck) topology?

A: LM3402MR/NOPB employs step-down (buck) topology, which requires input voltage higher than desired output voltage. The original SC600BIMSTRT uses charge pump topology suitable for 5V output from 2.5V to 6.5V input. LM3402MR/NOPB requires 6V minimum input and produces 40V output, making it unsuitable for direct replacement without significant circuit redesign.

Q: What is the significance of operating temperature range differences?

A: The SC600BIMSTRT operates to 150°C junction temperature, while most active substitutes operate to 85°C or 125°C. If your application requires operation above 125°C, substitute part selection is limited. For standard backlight applications operating below 85°C ambient, temperature differences are not limiting factors.

Q: Does dimming capability affect substitution decisions?

A: The original SC600BIMSTRT does not specify dimming capability. Substitute parts offering PWM or analog dimming provide functional enhancement without creating incompatibility. If your design does not require dimming, these additional features do not affect substitution suitability.