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Semtech Corporation SC654ULTRT
- Part No.:
- SC654ULTRT
- Manufacturer:
- Semtech Corporation
- Category:
- LED Drivers
- Package:
- 14-UFQFN
- Datasheet:
-
SC654ULTRT.pdf
- Description:
- IC LED DRIVER RGLTR 25MA 14MLPQ
- Quantity:
- Payment:
- Shipping:
Inventory:1,874
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Product details
Overview
SC654ULTRT from Semtech is a transient diverting suppressor (TDS) designed for high-energy EOS protection of 22V-rated power or I/O lines, featuring ±30kV IEC 61000-4-2 ESD immunity, 40A peak pulse current (8/20μs), 27.5–28V clamping voltage at 40A, and 20mΩ dynamic resistance. It protects USB Type-C PD buses, load switch inputs, and industrial interfaces where stable clamping under temperature and current stress is critical.
For engineers reviewing the SC654ULTRT datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, DFN-6 package layout guidance, real-world USB PD and load switch protection use cases, and validated alternative parts with documented functional differences.
Technical Context
The SC654ULTRT uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit that turns on the shunt path when transient voltage exceeds breakdown. Unlike conventional TVS diodes, its clamping voltage remains nearly constant across 24–40A (8/20μs) due to decreasing RDS(on) under surge conditions.
It operates from −40°C to +125°C with stable 27.5–28V clamping up to 125°C, 175pF junction capacitance at 22V/1MHz, and <600nA reverse leakage at VRWM. Its 6-pin DFN (1.6×1.6×0.55mm) requires all three IN pins (4–6) and all three GND pins (1–3) to be connected for full 40A rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - matches USB PD bus nominal voltage and withstand limits, enabling direct placement on VBUS lines without derating. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs) - stays below typical 30V damage threshold of USB PD controllers and load switches. |
| Peak Pulse Current | 40A (8/20μs) - satisfies IEC 61000-4-5 Level 4 surge immunity requirements for industrial and USB PD applications. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds automotive and industrial ESD robustness requirements without external staging. |
| Dynamic Resistance | 20mΩ - enables low-voltage overshoot during fast transients, minimizing stress on downstream silicon. |
| Junction Capacitance | 175pF at 22V/1MHz - compatible with DC power rails and low-speed control lines; not suitable for >100MHz signal paths. |
Pinout & Package
SC654ULTRT is housed in a RoHS-compliant, halogen-free DFN package measuring 1.6mm × 1.6mm × 0.55mm with exposed thermal pad (no solder mask defined). All six terminals must be connected per functional role to achieve rated surge performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground return path for surge current; all three pins must be connected with low-inductance vias to internal ground plane. |
| 4, 5, 6 | IN | Protected line input (e.g., VBUS, load switch VIN); parallel connection ensures current sharing and full 40A capability. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.5V across 24–40A and −40°C to +125°C - eliminates thermal derating calculations required for TVS diodes. |
| FET-based shunt protection | Surge energy dissipated in low-RDS(on) channel instead of PN junction - improves reliability and lifetime under repeated surges. |
| Low dynamic resistance | 20mΩ measured between 1A–40A (8/20μs) - reduces voltage overshoot during sub-microsecond rise-time transients. |
| High EFT immunity | ±4kV per IEC 61000-4-4 (5/50ns, 100kHz & 5kHz bursts) - protects against repetitive switching noise in motor drives and PLCs. |
Applications
| USB Type-C Power Delivery Bus Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting 20–22V VBUS lines in USB-C PD ports against lightning-induced surges and connector hot-plug ESD. IC Role / Device Role / Timing Role: Primary EOS shunt protector placed directly at the Type-C receptacle, clamping transients before they reach the PD controller or DC-DC converter. Use Value: Maintains 27.5–28V clamping across temperature and current - avoids overvoltage damage to 30V-rated PD ICs even at 125°C ambient. |
Use Scenario: Safeguarding the input of high-side load switches (e.g., HS2950P) in remote meters, robotics, and IoT hubs exposed to field wiring surges. IC Role / Device Role / Timing Role: Front-end transient diverter that limits voltage seen by the load switch's internal MOSFET gate oxide and drain-source junction. Use Value: Prevents latch-up or permanent failure of the load switch by holding clamping voltage below its absolute maximum rating (typically 30–36V). |
| Industrial Equipment DC Power Rail Protection | Notebook/Tablet Main Power Input Protection |
Use Scenario: Securing 24V DC input rails in programmable logic controllers (PLCs), HMI panels, and factory automation modules. IC Role / Device Role / Timing Role: Standalone surge suppression device on main power entry, complementing upstream fuses and filtering. Use Value: Delivers 40A (8/20μs) surge handling with minimal board area - replaces bulkier multi-device TVS arrays while improving thermal stability. |
Use Scenario: Protecting battery charging circuits and USB-C port VBUS inputs in thin-client notebooks and detachable tablets. IC Role / Device Role / Timing Role: Compact, low-profile EOS guard integrated near the connector to minimize trace inductance and coupling to adjacent high-speed signals. Use Value: 1.6×1.6mm footprint saves >60% board space vs. SO-8 TVS solutions - critical for ultra-thin form factors with tight layout constraints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDS2211P | Same die, identical electrical specs and package - confirmed drop-in replacement per Semtech documentation and marking code T22. | No functional difference; used interchangeably in USB PD and industrial designs per Semtech's own reference schematics. | Select when sourcing from distributors listing TDS2211P; identical performance and layout compatibility. |
| uClamp2411ZA | 24V working voltage, ±30kV ESD, but only 12A IPP (8/20μs) and higher 33V clamping - lacks FET-based constant-clamp architecture. | Suitable for CC/SBU lines in USB-C, not for VBUS or load switch inputs requiring 40A surge handling. | Choose only for low-current, low-capacitance signal-line protection - not a functional substitute for SC654ULTRT's power-rail role. |
Compared with TDS2211P, SC654ULTRT offers identical protection performance and mechanical fit; compared with uClamp2411ZA, it delivers 3.3× higher surge current capacity and 5.5V lower clamping - making it the sole viable option for 22V power rail EOS defense.
Availability
SC654ULTRT is available at Aetrix Electronics and suitable for USB Type-C PD systems, industrial load switch interfaces, and 22V DC power rail protection requiring stable component supply, long-term lifecycle support, and consistent surge performance across temperature extremes.
Supply support for SC654ULTRT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Semtech Corporation is a U.S.-based semiconductor company specializing in analog and mixed-signal ICs for precision sensing, protection, and connectivity.
SC654ULTRT belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered to replace traditional TVS diodes in high-reliability power rail protection where stable clamping under thermal and current stress is mandatory.
FAQ
What is the exact package type and dimensions of SC654ULTRT?
SC654ULTRT uses a 6-pin DFN package measuring 1.6mm × 1.6mm × 0.55mm with exposed thermal pad. Pin 1 is marked by a laser dot; pins 1–3 are GND, pins 4–6 are IN. The land pattern follows Semtech's recommended layout with multiple vias to ground for optimal surge current handling.
Does SC654ULTRT require external biasing or control signals to operate?
No, SC654ULTRT is fully passive and self-triggering. It contains an integrated precision trigger circuit and surge-rated FET - no external voltage, enable pin, or configuration is needed. It activates automatically when transient voltage exceeds its breakdown threshold, making SC654ULTRT ideal for plug-and-play protection.
Can SC654ULTRT be used on high-speed data lines like USB SuperSpeed or PCIe?
No, SC654ULTRT is not suitable for high-speed data lines. Its 175pF junction capacitance would severely degrade signal integrity above ~10MHz. SC654ULTRT is intended exclusively for DC power rails and low-speed control lines - for USB SS or DP/DM lines, Semtech recommends RClamp3371ZC (<0.25pF).
How does SC654ULTRT's clamping behavior differ from standard TVS diodes?
Unlike TVS diodes whose clamping voltage rises linearly with peak current (VC = VBR + IPP × RDYN), SC654ULTRT maintains ~27.5–28V clamping from 24A to 40A due to its FET-based architecture and decreasing RDS(on). This eliminates thermal derating and ensures predictable protection margins across operating conditions.
Is SC654ULTRT compliant with RoHS, REACH, and halogen-free standards?
Yes, SC654ULTRT is Pb-free, halogen-free, and compliant with RoHS Directive 2011/65/EU and WEEE Directive 2012/19/EU. Its molding compound meets UL 94V-0 flammability rating, and lead finish is 100% matte tin - fully documented in Semtech's official compliance statements.
SC654ULTRT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Series:
- SemPulse®
- Package/Case:
- 14-UFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- DC DC Regulator
- Topology:
- Switched Capacitor (Charge Pump)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 6
- Voltage - Supply (Min):
- 2.9V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- 2.5V ~ 5.25V
- Current - Output / Channel:
- 25mA
- Frequency:
- 250kHz
- Dimming:
- -
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-MLPQ-UT (2x2)
SC654ULTRT FAQ
1.How can I place an order for SC654ULTRT through Aetrix?
Please submit a Request for Quotation (RFQ) for SC654ULTRT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SC654ULTRT reliable?
The price and inventory of SC654ULTRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC654ULTRT is usually 5 days.
3.What payment methods are accepted for SC654ULTRT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC654ULTRT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC654ULTRT?
SC654ULTRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC654ULTRT order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SC654ULTRT?
For technical support, including SC654ULTRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC654ULTRT requirements.
6.How does Aetrix verify that SC654ULTRT is sourced from the original manufacturer or authorized distributors?
All SC654ULTRT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SC654ULTRT meets industry standards.
7.What is the process for return or replacement of SC654ULTRT?
All SC654ULTRT units undergo pre-shipment inspection (PSI). If there is an issue with SC654ULTRT, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SC654ULTRT part is unused and in its original packaging.
Return procedure for SC654ULTRT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SC654ULTRT Tags
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BCR402RE6327HTSA1
Infineon Technologies
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BCR430UXTSA2
Infineon Technologies
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BCR420UE6433HTMA1
Infineon Technologies
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BCR420UE6327HTSA1
Infineon Technologies
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BCR421UE6327HTSA1
Infineon Technologies
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LYT1604D-TL
Power Integrations
-
HV9910CLG-G
Microchip Technology
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CL2N8-G
Microchip Technology
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BCR420UW6-7
Diodes Incorporated
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BCR421UW6-7
Diodes Incorporated
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BCR420UFD-7
Diodes Incorporated
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BCR421UFD-7
Diodes Incorporated
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