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SC600CIMSTRT LED Driver IC Equivalent & Substitute Parts
Part Overview
The SC600CIMSTRT is a switched-capacitor LED driver IC manufactured by Semtech Corporation, designed for single-output backlight applications with 60mA output current capability. This device operates across a 2.5V to 6.5V supply range and delivers a fixed 5V output using charge pump topology at 650kHz switching frequency. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. Substitute parts are selected based on matching functional topology, output current capability, supply voltage range, and thermal operating specifications.
Substiute Parts
Key Parameters
| Parameter | SC600CIMSTRT |
|---|---|
| Manufacturer | Semtech Corporation |
| Category | Power Management (PMIC) |
| Type | DC DC Regulator |
| Topology | Switched Capacitor (Charge Pump) |
| Number of Outputs | 1 |
| Voltage - Supply (Min) | 2.5V |
| Voltage - Supply (Max) | 6.5V |
| Voltage - Output | 5V |
| Current - Output / Channel | 60mA |
| Frequency | 650kHz |
| Applications | Backlight |
| Operating Temperature | -40°C ~ 150°C (TJ) |
| Package / Case | 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) |
| Product Status | Obsolete |
| RoHS Status | RoHS Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution logic for the SC600CIMSTRT is based on the following critical parameters:
Primary Substitution Criteria:
- Single output DC DC regulator topology
- Output current capability: minimum 30mA to 60mA range
- Supply voltage range overlap: minimum 2.5V to 6.5V input support
- Backlight application suitability
- Surface mount packaging with thermal operating range of -40°C or lower minimum
Topology Considerations: The SC600CIMSTRT uses switched-capacitor (charge pump) topology. Direct topology matches are limited; however, step-up (boost) and buck-boost regulators with equivalent output current and voltage specifications provide functional equivalence for backlight driver applications. Step-down (buck) topologies are included where output current and supply voltage ranges support backlight operation.
Packaging and Thermal Compatibility: Substitute parts must accommodate surface mount assembly and maintain operating temperature ranges suitable for backlight applications (-40°C minimum ambient or junction temperature specification).
Parameter Comparison
| Part Number | Manufacturer | Topology | Supply Min (V) | Supply Max (V) | Output Current (mA) | Frequency (kHz) | Package | Temp Range (°C) | Status |
|---|---|---|---|---|---|---|---|---|---|
| SC600CIMSTRT | Semtech | Switched Capacitor | 2.5 | 6.5 | 60 | 650 | 10-MSOP | -40 ~ 150 (TJ) | Obsolete |
| LM3530UME-40/NOPB | Texas Instruments | Step-Up (Boost) | 2.7 | 5.5 | 30 | 500 | 12-DSBGA | -40 ~ 85 (TA) | Active |
| LM3508TLX/NOPB | Texas Instruments | Step-Up (Boost) | 2.7 | 5.5 | 30 | 850 | 9-DSBGA | -30 ~ 85 (TA) | Active |
| LED2000PUR | STMicroelectronics | Step-Down (Buck) | 3 | 18 | 3000 | 850 | 8-VFQFPN | -40 ~ 150 (TJ) | Active |
| LT3517IUF#TRPBF | Analog Devices Inc. | Buck-Boost | 3 | 30 | 1500 | 250 ~ 2500 | 16-QFN | -40 ~ 125 (TJ) | Active |
| MIC2282YMM-TR | Microchip Technology | Step-Up (Boost) | 0.9 | 15 | 1100 | 20 | 8-MSOP | -40 ~ 85 (TA) | Active |
| MP3307GJ-P | Monolithic Power Systems | Step-Up (Boost) | 2.7 | 5.5 | 1600 | 2220 | TSOT-23-8 | -40 ~ 125 (TJ) | Active |
| MP3308DL-LF-P | Monolithic Power Systems | Step-Up (Boost) | 3 | 6 | 1330 | 2200 | 14-QFN | -40 ~ 125 (TJ) | Active |
| MP24833-AGN-Z | Monolithic Power Systems | Buck-Boost | 4.5 | 55 | 3000 | 210 | 8-SOIC-EP | -40 ~ 125 (TJ) | Active |
| MP4603EF-LF-Z | Monolithic Power Systems | Buck-Boost | 4.5 | 80 | 2500 | 280 | 16-SOIC | -20 ~ 85 (TA) | Active |
| MPQ2483ADS-LF | Monolithic Power Systems | Buck-Boost | 4.5 | 55 | 2500 | 250 | 14-SOIC | -40 ~ 125 (TJ) | Active |
Engineering Selection Recommendations
Active Product Status Priority: All recommended substitute parts maintain active product status with manufacturers, ensuring long-term availability, technical support, and supply chain continuity. The SC600CIMSTRT obsolete status necessitates migration to actively supported alternatives.
Compliance and Certification: All substitute parts listed are RoHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements. Moisture sensitivity levels range from MSL 1 (unlimited) to MSL 2A (4 weeks), suitable for standard surface mount assembly processes.
Thermal Operating Range: For applications requiring the full -40°C to 150°C junction temperature range of the original SC600CIMSTRT, LED2000PUR (STMicroelectronics) provides the closest thermal specification at -40°C to 150°C (TJ). Alternative parts from Texas Instruments and Analog Devices support -40°C minimum ambient or junction temperatures, with most Monolithic Power Systems devices rated to -40°C to 125°C (TJ).
Supply Voltage Compatibility: The SC600CIMSTRT 2.5V minimum supply requirement is closely matched by LM3530UME-40/NOPB, LM3508TLX/NOPB, MP3307GJ-P, and MP3308DL-LF-P, all supporting 2.7V to 5.5V input ranges. For applications with higher supply voltages (above 6.5V), buck-boost topologies such as LT3517IUF#TRPBF, MP24833-AGN-Z, MP4603EF-LF-Z, and MPQ2483ADS-LF provide extended input voltage support.
Output Current Scaling: The SC600CIMSTRT 60mA output current is exceeded by all listed substitutes, providing design margin for backlight driver applications. Direct current matches at 30mA are available from Texas Instruments boost regulators (LM3530UME-40/NOPB, LM3508TLX/NOPB). Higher current capability (1.1A to 3A) is available from Microchip, Monolithic Power Systems, and Analog Devices for applications requiring increased LED drive current.
Frequently Asked Questions (FAQ)
Q: Can the SC600CIMSTRT be directly replaced with a pin-compatible substitute?
A: No direct pin-compatible replacement exists. The SC600CIMSTRT uses 10-MSOP packaging; however, substitute parts employ various packages (8-MSOP, 9-DSBGA, 12-DSBGA, 8-VFQFPN, 16-QFN, TSOT-23-8, 14-QFN, 8-SOIC, 16-SOIC, 14-SOIC). PCB redesign is required for package migration. Functional equivalence is achieved through topology and electrical parameter matching rather than pinout compatibility.
Q: What is the primary difference between the SC600CIMSTRT topology and substitute part topologies?
A: The SC600CIMSTRT employs switched-capacitor (charge pump) topology, which uses capacitive energy transfer without inductors. Most substitutes use inductive topologies: step-up (boost) regulators with inductors for voltage multiplication, or buck-boost regulators for bidirectional voltage conversion. Both topologies achieve single-output LED driver functionality but differ in component count, PCB area, and electromagnetic interference characteristics.
Q: Which substitute part best matches the SC600CIMSTRT thermal operating range?
A: LED2000PUR (STMicroelectronics) provides the closest thermal specification, supporting -40°C to 150°C junction temperature, identical to the original part. This part is recommended for applications requiring the full extended temperature range. Alternative parts from Texas Instruments and Monolithic Power Systems support -40°C minimum temperatures with upper limits of 85°C to 125°C.
Q: Are all substitute parts suitable for backlight applications?
A: Yes. All listed substitute parts are specified for backlight, lighting, or signage applications. Each part is rated for single-output LED driver operation with PWM or analog dimming capability. Application-specific selection depends on dimming control requirements (PWM vs. analog) and output current needs.
Q: What packaging considerations apply when migrating from SC600CIMSTRT?
A: The SC600CIMSTRT uses 10-MSOP (0.118", 3.00mm width) surface mount packaging. Substitute parts range from compact TSOT-23-8 packages (smallest footprint) to larger 16-SOIC packages (larger footprint). MIC2282YMM-TR also uses 8-MSOP packaging, providing a similar form factor. Evaluate PCB layout constraints, thermal dissipation requirements, and assembly capabilities when selecting alternative packages.
Q: Can substitute parts with higher output current ratings be used in place of the SC600CIMSTRT?
A: Yes. Higher output current ratings provide design margin and allow for increased LED drive current if application requirements change. However, ensure that the substitute part's supply voltage range, topology, and package thermal characteristics remain compatible with the target application. Over-specification does not negatively impact performance in current-limited backlight driver applications.
Q: What is the significance of MSL (Moisture Sensitivity Level) ratings for substitute parts?
A: MSL ratings indicate moisture absorption limits during storage and assembly. MSL 1 (unlimited) parts have no moisture sensitivity restrictions. MSL 2A (4 weeks) parts require baking before reflow if exposed to ambient humidity for extended periods. All listed substitutes are compatible with standard surface mount assembly processes; MSL 2A parts require standard moisture control procedures during manufacturing.
Q: Are all substitute parts RoHS compliant?
A: Yes. All substitute parts listed are RoHS3 compliant and REACH unaffected, meeting current environmental regulations for electronic component manufacturing and use in regulated markets.
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