SC600DIMSTRT LED Driver IC Equivalent & Substitute Parts

Part Overview

The SC600DIMSTRT is a LED Driver IC manufactured by Semtech Corporation, classified as a Power Management (PMIC) device. This component functions as a 1-output DC DC regulator utilizing switched capacitor (charge pump) topology with 120mA output capability, designed for backlight applications. The part operates across a 2.5V to 6.5V supply range and delivers 5V output at 650kHz switching frequency.

The SC600DIMSTRT carries an Obsolete product status, making it necessary to identify functionally equivalent alternatives for new designs and ongoing production requirements. The part is RoHS Compliant with MSL 1 (Unlimited) moisture sensitivity rating and maintains 40,400 units in current inventory stock.

Key Parameters

Parameter	SC600DIMSTRT Value
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	120mA
Frequency	650kHz
Applications	Backlight
Operating Temperature	-40°C ~ 150°C (TJ)
Mounting Type	Surface Mount
Package / Case	10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
RoHS Status	RoHS Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the SC600DIMSTRT requires matching or exceeding the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

DC DC Regulator topology (Switched Capacitor, Step-Up Boost, or Step-Down Buck acceptable based on application requirements)
Single output configuration
Supply voltage range compatibility: minimum 2.5V input, maximum 6.5V input
Output voltage capability: 5V nominal or adjustable to 5V
Output current: minimum 120mA capability
Switching frequency: 650kHz nominal (±20% tolerance acceptable)
Surface mount packaging with compatible footprint dimensions
Operating temperature range: -40°C to at least 85°C minimum
RoHS compliance and MSL rating suitable for production environments
Active or recently active product status preferred for long-term availability

Secondary Compatibility Factors:

Dimming capability (PWM, Analog, or I2C control)
Internal switch integration
Application alignment (Backlight, Lighting, Camera Flash)
Automotive grade qualification (AEC-Q100) where applicable

Parameter Comparison

Parameter	SC600DIMSTRT	LT3592EMSE#PBF	MP3306EG-LF-Z	LM2705MFX-ADJ/NOPB	RT8453BGSP	MP2481DH-LF-Z	ISL78100ARZ-T7A	LM2759SD/NOPB
Manufacturer	Semtech	Analog Devices	MPS	Texas Instruments	Richtek	MPS	Renesas	Texas Instruments
Type	DC DC Regulator	DC DC Regulator	DC DC Regulator	DC DC Regulator	DC DC Regulator	DC DC Regulator	DC DC Regulator	DC DC Regulator
Topology	Switched Capacitor (Charge Pump)	Step-Down (Buck)	Step-Up (Boost)	Step-Up (Boost)	Step-Down (Buck)	Step-Down (Buck)	Step-Down (Buck), Step-Up (Boost)	Switched Capacitor (Charge Pump)
Number of Outputs	1	1	1	1	1	1	1	1
Voltage - Supply (Min)	2.5V	3.6V	3V	2.2V	4.5V	4.5V	2.7V	2.7V
Voltage - Supply (Max)	6.5V	36V	12V	7V	40V	36V	16V	5.5V
Voltage - Output	5V	30V	30V	20V	—	—	32V	2V ~ 4V
Current - Output / Channel	120mA	50mA, 500mA	1.8A (Switch)	150mA	1.5A (Switch)	1.2A	1A	1A (Flash)
Frequency	650kHz	400kHz ~ 2.2MHz	690kHz	—	500kHz	1.4MHz	1MHz	1MHz
Applications	Backlight	Lighting	Backlight	Backlight	Backlight, Lighting	Backlight, Lighting	Backlight	Camera Flash
Operating Temperature	-40°C ~ 150°C (TJ)	-40°C ~ 125°C (TA)	-40°C ~ 125°C (TJ)	-40°C ~ 85°C (TA)	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)	-40°C ~ 105°C (TA)	-30°C ~ 85°C (TA)
Package / Case	10-TFSOP, 10-MSOP	10-TFSOP, 10-MSOP-EP	12-TFQFN	SC-74A, SOT-753	8-SOIC (0.154", 3.90mm Width) Exposed Pad	8-TSSOP, 8-MSOP-EP	20-VFQFN Exposed Pad	12-WFDFN Exposed Pad
RoHS Status	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Primary Substitute: LT3592EMSE#PBF

LT3592EMSE#PBF from Analog Devices Inc. provides the closest functional match with active product status. This Step-Down (Buck) topology regulator operates across 3.6V to 36V supply range, exceeding the SC600DIMSTRT's 2.5V to 6.5V requirement. Output current capability reaches 50mA to 500mA, surpassing the 120mA requirement. The 10-MSOP-EP package maintains footprint compatibility with the original SC600DIMSTRT. Operating temperature range extends to -40°C to 125°C (TA), and ROHS3 compliance ensures regulatory alignment. Switching frequency range of 400kHz to 2.2MHz encompasses the 650kHz nominal specification.

Secondary Substitute: MP3306EG-LF-Z

MP3306EG-LF-Z from Monolithic Power Systems Inc. operates as a Step-Up (Boost) topology with 1.8A switch current capability and 690kHz switching frequency, closely matching the 650kHz specification. Supply voltage range of 3V to 12V accommodates the upper portion of the SC600DIMSTRT's operating window. Output voltage reaches 30V with Analog and PWM dimming support. The 12-QFN (2x2) package differs from the original but provides compact surface-mount integration. Active product status and ROHS3 compliance support long-term availability. Operating temperature range of -40°C to 125°C (TJ) exceeds minimum requirements.

Tertiary Substitute: RT8453BGSP

RT8453BGSP from Richtek USA Inc. delivers Step-Down (Buck) topology with 1.5A switch current and 500kHz switching frequency. Supply voltage range of 4.5V to 40V covers the upper SC600DIMSTRT operating range. Analog and PWM dimming capabilities provide flexible control options. The 8-SOP-EP package offers surface-mount compatibility. Active product status and ROHS3 compliance ensure production viability. Operating temperature range of -40°C to 125°C (TJ) meets thermal requirements.

Compliance Considerations:

All recommended substitutes maintain ROHS3 compliance status, ensuring regulatory alignment with the original SC600DIMSTRT RoHS Compliant specification. ISL78100ARZ-T7A from Renesas Electronics Corporation includes AEC-Q100 automotive qualification, suitable for applications requiring automotive-grade components. MP2481DH-LF-Z from Monolithic Power Systems carries automotive grade designation with MSL 2 (1 Year) rating, appropriate for automotive backlight and lighting applications.

Frequently Asked Questions (FAQ)

Q: Can LT3592EMSE#PBF directly replace SC600DIMSTRT in existing designs?

A: LT3592EMSE#PBF shares the 10-MSOP-EP package footprint with SC600DIMSTRT, enabling direct PCB placement compatibility. However, topology differs (Step-Down Buck versus Switched Capacitor Charge Pump), requiring circuit design verification. Supply voltage and output current specifications exceed SC600DIMSTRT requirements, supporting functional substitution in backlight applications. Pin configuration and control signal requirements must be validated against original schematic.

Q: What is the primary difference between Switched Capacitor and Step-Up Boost topologies?

A: Switched Capacitor (Charge Pump) topology, used in SC600DIMSTRT, transfers energy through capacitive elements without inductors, enabling compact integration and lower EMI. Step-Up (Boost) topology, employed in MP3306EG-LF-Z and LM2705MFX-ADJ/NOPB, uses inductive energy storage for higher efficiency at elevated current levels. Charge pump designs suit low-current backlight applications, while boost converters accommodate higher current demands and wider input voltage ranges.

Q: Are all substitute parts suitable for backlight applications?

A: LT3592EMSE#PBF, MP3306EG-LF-Z, LM2705MFX-ADJ/NOPB, RT8453BGSP, MP2481DH-LF-Z, and ISL78100ARZ-T7A explicitly list backlight applications. LM2759SD/NOPB targets camera flash applications with I2C dimming control, suitable for flash LED driver requirements rather than continuous backlight operation. Application alignment ensures optimal performance and feature utilization.

Q: What packaging considerations apply when selecting substitutes?

A: SC600DIMSTRT uses 10-MSOP (0.118", 3.00mm Width) package. LT3592EMSE#PBF maintains identical 10-MSOP-EP footprint, enabling direct PCB substitution. MP3306EG-LF-Z employs 12-QFN (2x2), RT8453BGSP uses 8-SOP-EP, and ISL78100ARZ-T7A utilizes 20-QFN (4x4), each requiring PCB layout modifications. Package selection impacts board space, thermal management, and manufacturing processes. Verify PCB design compatibility before component selection.

Q: How do supply voltage ranges affect substitution suitability?

A: SC600DIMSTRT operates across 2.5V to 6.5V input range. LM2705MFX-ADJ/NOPB extends to 2.2V minimum, providing superior low-voltage performance. LT3592EMSE#PBF requires 3.6V minimum, limiting operation below this threshold. MP3306EG-LF-Z operates from 3V minimum. RT8453BGSP and MP2481DH-LF-Z require 4.5V minimum, restricting low-voltage applications. Application power supply specifications determine voltage range compatibility requirements.

Q: What dimming control options are available across substitute parts?

A: SC600DIMSTRT provides basic dimming without specified control method. LT3592EMSE#PBF offers unspecified dimming. MP3306EG-LF-Z supports Analog and PWM dimming. RT8453BGSP provides Analog and PWM control. MP2481DH-LF-Z includes Analog and PWM dimming. LM2759SD/NOPB features I2C digital dimming for camera flash applications. ISL78100ARZ-T7A supports Analog and PWM dimming. Dimming method selection depends on system control architecture and user interface requirements.

Q: Why is product status important in component selection?

A: SC600DIMSTRT carries Obsolete status, indicating discontinued manufacturing and limited future availability. All recommended substitutes maintain Active product status, ensuring long-term supply chain reliability, ongoing manufacturer support, and continued production. Active status supports design longevity, warranty coverage, and technical documentation availability. Obsolete components present supply risk and should be replaced in new designs.

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