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SC622ULTRT LED Driver IC Equivalent & Substitute Parts
Part Overview
The SC622ULTRT is a Semtech LED Driver IC featuring a switched capacitor (charge pump) topology with 400mA flash output capability, designed for camera flash applications. This device operates across a 3V to 5.5V supply range and delivers regulated output from 2.5V to 5.25V. The SC622ULTRT is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements.
Substiute Parts
Key Parameters
| Parameter | SC622ULTRT |
|---|---|
| Manufacturer | Semtech |
| Product Status | Obsolete |
| Type | DC DC Regulator |
| Topology | Switched Capacitor (Charge Pump) |
| Number of Outputs | 1 |
| Voltage Supply (Min) | 3V |
| Voltage Supply (Max) | 5.5V |
| Voltage Output | 2.5V ~ 5.25V |
| Current Output / Channel | 400mA (Flash) |
| Applications | Camera Flash |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Package / Case | 20-VFQFN Exposed Pad |
| RoHS Status | RoHS Compliant |
| MSL | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution for the SC622ULTRT is determined by the following critical parameters:
- Topology: Switched Capacitor (Charge Pump) or equivalent DC DC regulation method
- Output Current: Minimum 400mA capability to support flash applications
- Supply Voltage Range: 3V to 5.5V input compatibility
- Output Voltage Range: 2.5V to 5.25V regulation capability
- Package Compatibility: Surface mount with exposed pad design
- Product Status: Active status preferred for long-term availability
- Compliance: RoHS and MSL ratings suitable for production environments
The substitute parts listed below are grouped by topology and current capability, with preference given to active products offering improved thermal performance and extended temperature ratings.
Parameter Comparison
| Parameter | SC622ULTRT | LM3405XMKX/NOPB | LM3410XMY/NOPB | LM3414HVMRX/NOPB | LT3932HUFD#TRPBF | LTC3490ES8#PBF | MCP1643-I/MC | MP2410GJ-Z |
|---|---|---|---|---|---|---|---|---|
| Manufacturer | Semtech | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices Inc. | Analog Devices Inc. | Microchip Technology | Monolithic Power Systems Inc. |
| Product Status | Obsolete | Active | Active | Active | Active | Active | Active | Active |
| 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) | SEPIC, Step-Up (Boost) | Step-Down (Buck) | Step-Down (Buck) | Step-Up (Boost) | Step-Up (Boost) | Step-Down (Buck) |
| Number of Outputs | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Voltage Supply (Min) | 3V | 3V | 2.7V | 4.5V | 3.6V | 1V | 0.5V | 4.2V |
| Voltage Supply (Max) | 5.5V | 15V | 5.5V | 65V | 36V | 3.2V | 5V | 24V |
| Voltage Output | 2.5V ~ 5.25V | 14.6V | 3V ~ 24V | - | - | 2.8V ~ 4V | 5V | - |
| Current Output / Channel | 400mA (Flash) | 1A | 2.8A (Switch) | 1A | 2A | 350mA | 550mA | 2A |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 125°C (TJ) | -40°C ~ 125°C (TJ) | -40°C ~ 125°C (TJ) | -40°C ~ 150°C (TJ) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 125°C (TJ) |
| RoHS Status | RoHS Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| MSL | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 3 (168 Hours) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
Engineering Selection Recommendations
Primary Substitutes for Direct Replacement:
LM3414HVMRX/NOPB and LT3932HUFD#TRPBF are the most suitable direct replacements. Both are active products with ROHS3 compliance, MSL-1 ratings, and extended operating temperature ranges. LM3414HVMRX/NOPB operates at 1A output current with step-down topology, while LT3932HUFD#TRPBF provides 2A output with automotive-grade qualification and wider supply voltage tolerance (3.6V to 36V).
Alternative Substitutes by Application:
For lighting applications requiring higher current capacity, LM3410XMY/NOPB and LM3410XMYE/NOPB offer 2.8A switch current with SEPIC/boost topology, suitable for backlight implementations. MP2410GJ-Z provides 2A step-down regulation with analog dimming capability across 4.2V to 24V supply range.
For lower current flash applications, LTC3490ES8#PBF delivers 350mA boost regulation with analog dimming from 1V to 3.2V supply, and MCP1643-I/MC provides 550mA PWM-dimmed boost output from ultra-low 0.5V supply.
All recommended substitutes maintain RoHS3 compliance and MSL-1 or MSL-3 ratings suitable for production environments. Product status is active for all alternatives, ensuring long-term availability and supply chain stability.
Frequently Asked Questions (FAQ)
Q: Can LM3414HVMRX/NOPB directly replace SC622ULTRT in existing designs?
A: LM3414HVMRX/NOPB is functionally compatible but requires circuit redesign. The SC622ULTRT uses switched capacitor topology with 400mA flash output, while LM3414HVMRX/NOPB employs step-down buck topology with 1A continuous output. Supply voltage compatibility overlaps at 3V to 5.5V range. Package differs: SC622ULTRT uses 20-VFQFN while LM3414HVMRX/NOPB uses 8-PowerSOIC. Schematic modifications are necessary.
Q: What is the key difference between LT3932HUFD#TRPBF and LM3414HVMRX/NOPB?
A: LT3932HUFD#TRPBF supports wider supply voltage (3.6V to 36V) and higher output current (2A) compared to LM3414HVMRX/NOPB (4.5V to 65V supply, 1A output). LT3932HUFD#TRPBF includes automotive-grade qualification and operates to 150°C junction temperature. Both use step-down topology with PWM/analog dimming. LT3932HUFD#TRPBF is packaged in 28-QFN while LM3414HVMRX/NOPB uses 8-PowerSOIC.
Q: Is MCP1643-I/MC suitable for camera flash applications?
A: MCP1643-I/MC is a boost topology LED driver with 550mA output current and PWM dimming, designed for backlight applications. While current capacity exceeds SC622ULTRT flash requirements, the boost topology and 0.5V to 5V supply range differ significantly from the original switched capacitor design. Application suitability depends on specific circuit requirements and output voltage needs.
Q: What packaging considerations apply when substituting SC622ULTRT?
A: SC622ULTRT uses 20-VFQFN exposed pad package. Substitute parts employ different packages: LM3414HVMRX/NOPB (8-PowerSOIC), LT3932HUFD#TRPBF (28-QFN), LM3410XMY/NOPB (8-HVSSOP), MP2410GJ-Z (TSOT-23-6), and LTC3490ES8#PBF (8-SO). PCB layout redesign is required for any substitution. Thermal management differs based on package exposed pad area and power dissipation characteristics.
Q: Are all substitute parts RoHS and MSL compliant?
A: All listed substitutes maintain ROHS3 compliance. MSL ratings vary: LM3405XMKX/NOPB, LM3410XMY/NOPB, LM3410XMYE/NOPB, LT3932HUFD#TRPBF, LTC3490ES8#PBF, MCP1643-I/MC, and MP2410GJ-Z are MSL-1 (unlimited). LM3414HVMRX/NOPB is MSL-3 (168 hours), requiring controlled moisture exposure during storage and assembly.
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