SC600AIMSTRT LED Driver IC Equivalent & Substitute Parts

Part Overview

The SC600AIMSTRT is a Semtech Corporation LED Driver IC featuring a switched capacitor (charge pump) topology with 60mA output capability, designed for backlight applications. This part operates across a 2.5V to 6.5V supply range and delivers a fixed 5V output at 650kHz switching frequency. The SC600AIMSTRT is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain functional compatibility while accommodating modern active product availability and enhanced performance characteristics.

Key Parameters

Parameter	SC600AIMSTRT
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
Package / Case	10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
Operating Temperature	-40°C ~ 150°C (TJ)
Product Status	Obsolete
RoHS Status	RoHS Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution logic for the SC600AIMSTRT is based on the following critical parameters:

Primary Substitution Criteria:

Topology: Switched Capacitor (Charge Pump) topology preferred for direct functional equivalence
Output Current: Minimum 60mA capability required
Supply Voltage Range: Compatibility with 2.5V to 6.5V input range
Output Voltage: Fixed or adjustable output capable of delivering 5V
Package Type: Surface mount packages suitable for PCB integration
Operating Temperature: Extended range preferred (-40°C minimum)
Product Status: Active products prioritized for long-term availability

Substitution Groups:

Group 1: Direct Charge Pump Topology Substitutes Parts maintaining switched capacitor (charge pump) topology with comparable current ratings and voltage specifications. These provide the closest functional equivalence to the SC600AIMSTRT.

Group 2: Alternative Topology Substitutes (Buck, Boost, SEPIC) Parts utilizing step-down (buck), step-up (boost), or SEPIC topologies with higher current capabilities and extended supply voltage ranges. These offer enhanced performance characteristics while maintaining single-output LED driver functionality.

Group 3: High-Current Versatile Substitutes Parts with multi-topology support, higher current ratings (1.5A to 5A), and flexible voltage configurations. These accommodate designs requiring greater power delivery and topology flexibility.

Parameter Comparison

Part Number	Manufacturer	Topology	Output Current	Supply Min	Supply Max	Output Voltage	Frequency	Package	Temp Range	Status
SC600AIMSTRT	Semtech	Switched Capacitor	60mA	2.5V	6.5V	5V	650kHz	10-MSOP	-40°C ~ 150°C	Obsolete
LTC3215EDD#TRPBF	Analog Devices	Switched Capacitor	700mA	2.9V	4.4V	-	900kHz	10-DFN	-40°C ~ 85°C	Active
LT3593EDC#TRPBF	Analog Devices	Step-Up (Boost)	45mA	2.7V	5.5V	-	1MHz	6-DFN	-40°C ~ 85°C	Active
LT3590EDC#TRMPBF	Analog Devices	Step-Down (Buck)	80mA	4.5V	55V	55V	850kHz	6-DFN	-40°C ~ 85°C	Active
LM3410XSD/NOPB	Texas Instruments	SEPIC, Step-Up (Boost)	2.8A (Switch)	2.7V	5.5V	3V ~ 24V	1.6MHz	6-WSON	-40°C ~ 125°C	Active
LM3404HVMAX/NOPB	Texas Instruments	Step-Down (Buck)	1A	6V	75V	73V	1MHz	8-SOIC	-40°C ~ 125°C	Active
A6211GLJTR-T	Allegro MicroSystems	Step-Down (Buck)	3A	6V	48V	-	-	8-SOIC-EP	-40°C ~ 105°C	Active
ISL78100ARZ-TK	Renesas Electronics	Step-Down (Buck), Step-Up (Boost)	1A	2.7V	16V	32V	1MHz	20-QFN	-40°C ~ 105°C	Active
LT3517EUF#TRPBF	Analog Devices	Step-Down (Buck), Step-Up (Boost)	1.5A (Switch)	3V	30V	-	250kHz ~ 2.5MHz	16-QFN	-40°C ~ 125°C	Active
LT3932IUFD#PBF	Analog Devices	Step-Down (Buck)	2A	3.6V	36V	-	200kHz ~ 2MHz	28-QFN	-40°C ~ 125°C	Active
LT3954IUHE#TRPBF	Analog Devices	Flyback, SEPIC, Step-Down (Buck), Step-Up (Boost)	5A (Switch)	4.5V	40V	-	100kHz ~ 1MHz	36-QFN	-40°C ~ 125°C	Active

Engineering Selection Recommendations

For Direct Functional Replacement (Charge Pump Topology):

LTC3215EDD#TRPBF is the primary active substitute maintaining switched capacitor topology. This part delivers 700mA output current, exceeding the SC600AIMSTRT's 60mA specification. Supply voltage range (2.9V to 4.4V) overlaps the lower portion of the original part's range. The 10-DFN package provides comparable footprint density to the 10-MSOP original. RoHS3 compliance and MSL 1 rating ensure manufacturing compatibility. Operating temperature range (-40°C to 85°C) is slightly reduced from the original but remains suitable for backlight applications.

For Extended Supply Voltage Applications:

LT3590EDC#TRMPBF provides step-down (buck) topology with 80mA output current and extended supply voltage range (4.5V to 55V). This part accommodates higher input voltage scenarios while maintaining comparable current delivery. The 6-DFN package offers compact integration. RoHS3 compliance and MSL 1 rating support production requirements.

For Flexible Topology and Higher Current Requirements:

LM3410XSD/NOPB combines SEPIC and step-up (boost) topologies with 2.8A switch current and 3V to 24V output voltage range. Supply voltage compatibility (2.7V to 5.5V) aligns with the SC600AIMSTRT's lower range. Extended operating temperature (-40°C to 125°C) exceeds original specifications. This part suits designs requiring topology flexibility and higher power delivery.

For Automotive and Extended Temperature Applications:

LT3517EUF#TRPBF and LT3932IUFD#PBF both feature automotive-grade qualification (LT3932 carries AEC-Q100 certification). These parts support -40°C to 125°C operating range and provide multi-topology support. LT3517 offers buck/boost flexibility with 1.5A switch current. LT3932 delivers 2A buck topology with 200kHz to 2MHz frequency range.

For High-Current Versatile Applications:

LT3954IUHE#TRPBF supports multiple topologies (Flyback, SEPIC, Buck, Boost) with 5A switch current and 100kHz to 1MHz frequency range. This part accommodates complex power delivery architectures while maintaining -40°C to 125°C operating range and RoHS3 compliance.

All recommended substitutes carry active product status, ensuring long-term availability and manufacturing support. Selection should prioritize topology alignment with circuit requirements and supply voltage compatibility with system architecture.

Frequently Asked Questions (FAQ)

Q: Can LTC3215EDD#TRPBF directly replace SC600AIMSTRT in existing designs?

A: LTC3215EDD#TRPBF maintains switched capacitor topology and provides higher current capability (700mA vs. 60mA). However, supply voltage range differs (2.9V to 4.4V vs. 2.5V to 6.5V). Direct substitution requires verification that input voltage remains within 2.9V to 4.4V range. PCB layout modifications may be necessary due to 10-DFN package differences from 10-MSOP.

Q: What is the primary difference between charge pump and buck/boost topologies for LED driver applications?

A: Switched capacitor (charge pump) topology uses capacitive energy transfer without inductors, resulting in smaller footprints and lower EMI. Buck and boost topologies employ inductors for energy storage, enabling higher current delivery and wider voltage conversion ranges. Charge pump designs suit low-current backlight applications; buck/boost designs accommodate higher-power lighting systems.

Q: Are all substitute parts RoHS compliant?

A: All listed substitute parts carry RoHS3 compliance status, meeting current environmental and manufacturing standards. The original SC600AIMSTRT is RoHS compliant. Compliance verification should be confirmed with component datasheets for specific production batches.

Q: Which substitute part offers the widest supply voltage range?

A: LT3954IUHE#TRPBF provides the widest supply voltage range (4.5V to 40V) with multi-topology support. For lower voltage applications, LM3410XSD/NOPB and ISL78100ARZ-TK both support 2.7V minimum input. LT3590EDC#TRMPBF extends to 55V maximum supply voltage for high-voltage applications.

Q: What package considerations apply when substituting the 10-MSOP original?

A: LTC3215EDD#TRPBF uses 10-DFN (3x3) package, comparable in pin count and footprint density. LT3590EDC#TRMPBF and LT3593EDC#TRPBF use 6-DFN packages, requiring PCB layout redesign. LM3410XSD/NOPB uses 6-WSON package. Larger packages (LT3517 16-QFN, LT3932 28-QFN, LT3954 36-QFN) require significant layout modifications. Footprint compatibility must be verified before design implementation.

Q: Can substitute parts with higher current ratings be used in low-current applications?

A: Yes. Parts with higher current ratings (1A, 2A, 5A) can operate in low-current applications (60mA). Design must ensure proper current limiting and thermal management. Higher-rated parts may introduce unnecessary complexity and cost for simple backlight applications. Selection should balance performance requirements with design simplicity.

Q: What operating temperature range is suitable for backlight applications?

A: SC600AIMSTRT operates -40°C to 150°C (TJ). Most active substitutes support -40°C to 125°C (LM3410, LT3517, LT3932, LT3954) or -40°C to 105°C (A6211, ISL78100). For applications requiring extended high-temperature operation, LM3410XSD/NOPB and LT3517EUF#TRPBF provide -40°C to 125°C range. Backlight applications typically operate within -20°C to 60°C ambient range, making all listed substitutes suitable.

Q: Are automotive-grade qualifications available among substitute parts?

A: Yes. LM3404HVMAX/NOPB, LT3932IUFD#PBF, and ISL78100ARZ-TK carry automotive-grade designations. ISL78100ARZ-TK includes AEC-Q100 qualification. These parts suit automotive lighting and display applications requiring enhanced reliability and qualification documentation.

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