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Semtech Corporation SC183CULTRT
- Part No.:
- SC183CULTRT
- Manufacturer:
- Semtech Corporation
- Package:
- 16-UFQFN Exposed Pad
- Datasheet:
-
SC183CULTRT.pdf
- Description:
- IC REG BUCK PROG 2A 16MLPQ
- Quantity:
- Payment:
- Shipping:
Inventory:16,240
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Product details
Overview
SC183CULTRT 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, 20mΩ dynamic resistance, and 175pF junction capacitance. It protects USB PD, USB Type-C VBus, and load switch inputs in industrial and portable electronics.
For engineers reviewing the SC183CULTRT datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, DFN-6 package layout guidance, real-world clamping stability across temperature and current, and validated alternatives for 22V bus protection design.
Technical Context
The SC183CULTRT 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 - 27.5–28V - across 24A to 40A peak pulse current and from –40°C to +125°C due to ultra-low RDS(on).
It operates with reverse stand-off voltage (VRWM) of 22V, reverse breakdown (VBR) of 25–27.9V, and forward voltage (VF) of 0.5V, enabling robust protection without forward conduction during normal operation. Its 175pF capacitance at 22V/1MHz supports high-speed interfaces while maintaining low signal distortion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - matches nominal USB PD VBus and industrial 24V rail systems without derating. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs) - stays below 30V damage threshold of common load switches and PD controllers. |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 surge immunity for industrial equipment. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds automotive and consumer ESD requirements. |
| Dynamic Resistance | 20mΩ - ensures minimal voltage rise under surge, critical for stable clamping performance. |
| Junction Capacitance | 175pF at 22V/1MHz - low enough for USB PD VBus protection without signal integrity impact. |
| Operating Temp | –40°C to +125°C - supports extended-range industrial and automotive under-hood applications. |
Pinout & Package
SC183CULTRT is housed in a Pb-free, RoHS-compliant DFN-6 package measuring 1.6mm × 1.6mm × 0.55mm with UL 94V-0 molding compound. All six terminals are surface-mount; no thermal pad required - energy is dissipated within the FET structure.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground return for surge current; all three must be connected to maximize current handling and minimize parasitic inductance. |
| 4, 5, 6 | IN | Protected line input (e.g., USB PD VBus); parallel connection of all three pins ensures uniform current sharing and optimal 40A capability. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.5V across full 24–40A surge range and –40°C to +125°C - eliminates thermal derating uncertainty. |
| FET-based shunt topology | Replaces traditional TVS junctions with low-RDS(on) MOSFET, reducing clamping voltage by ~10V vs. comparable TVS at 125°C. |
| Low dynamic resistance | 20mΩ enables <1V IR drop at 40A - critical for protecting sensitive downstream ICs with tight overvoltage margins. |
| High EFT immunity | ±4kV per IEC 61000-4-4 (5/50ns, 100kHz/5kHz) - safeguards against repetitive fast transients in motor drives and PLCs. |
| Space-optimized DFN | 1.6mm × 1.6mm footprint saves >60% board area vs. SO-8 TVS solutions - ideal for compact USB-C connectors and IoT modules. |
Applications
| USB Type-C Power Delivery Protection | Industrial Load Switch Input Protection |
|---|---|
|
Use Scenario: Protecting the VBus line of a USB Type-C port supporting up to 20V/5A PD negotiation in notebooks and docking stations. IC Role / Device Role / Timing Role: SC183CULTRT acts as primary high-energy EOS clamp upstream of the PD controller and load switch, triggered within nanoseconds of overvoltage onset. Use Value: Maintains 27.5–28V clamping across temperature - avoids false trips or damage to 30V-rated PD controllers where conventional TVS would exceed 35V at 125°C. |
Use Scenario: Securing the input of an industrial-grade load switch (e.g., HS2950P) in remote metering or robotics systems exposed to lightning-induced surges. IC Role / Device Role / Timing Role: SC183CULTRT diverts transient energy away from the load switch's internal FET gate oxide and drain-source junction before destructive voltage develops. Use Value: Enables use of cost-optimized 30V-rated load switches instead of higher-voltage, higher-RDS(on) alternatives - preserving efficiency and thermal margin. |
| IoT Edge Device Power Rail Protection | Storage Device 22V Backup Supply Protection |
|
Use Scenario: Guarding the 22V auxiliary supply rail of a cellular-connected smart sensor node deployed outdoors or in factory environments. IC Role / Device Role / Timing Role: SC183CULTRT serves as first-line defense against ESD from handling, EFT from nearby switching loads, and induced surges on long interconnect cables. Use Value: Delivers ±30kV ESD and ±4kV EFT immunity in a 1.6mm² footprint - eliminating need for secondary protection stages and reducing BOM count. |
Use Scenario: Protecting the 22V backup power input of an NVMe SSD module or enterprise SSD controller board during hot-swap or power-fail events. IC Role / Device Role / Timing Role: SC183CULTRT clamps transients on the backup rail before they propagate to charge-pump circuits or supercapacitor charging paths. Use Value: Prevents latch-up or gate oxide rupture in PMICs managing 22V backup supplies - ensuring data integrity during unexpected power transitions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDS2211P.C | Identical electrical specs, same DFN-6 package, identical marking code T22 - direct Semtech replacement with same date-code traceability. | No functional difference; used interchangeably in USB-C and industrial designs per Semtech documentation. | Select TDS2211P.C when sourcing from authorized Semtech channels requiring exact part-number compliance. |
| uClamp2411ZA.TCT | 24V working voltage, lower 22V clamping (typ. 22V @ 5A), but rated only to 5A IPP - insufficient for 40A surge requirements. | Suitable for CC/SBU lines in USB-C, not for VBus or power rails requiring high-current surge handling. | Choose uClamp2411ZA.TCT only for low-capacitance, low-current signal-line protection - not as a functional substitute for SC183CULTRT. |
Compared with SC183CULTRT, TDS2211P.C offers identical performance and form factor as a direct Semtech variant, while uClamp2411ZA.TCT serves a different application tier - it lacks the 40A surge rating and constant-clamp architecture needed for power-rail protection.
Availability
SC183CULTRT is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch inputs, and IoT edge device power rails requiring stable component supply across extended temperature and high-reliability surge environments.
Supply support for SC183CULTRT 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 fabless semiconductor company specializing in analog and mixed-signal ICs for precision sensing, protection, and connectivity.
The SC183CULTRT belongs to Semtech's Transient Diverting Suppressor (TDS) family, engineered to replace conventional TVS diodes in high-energy EOS applications where stable clamping across temperature and current is mission-critical.
FAQ
What is the maximum clamping voltage of SC183CULTRT at 40A surge current?
The SC183CULTRT clamps at 27.5–28V under 40A peak pulse current (8/20μs waveform, 2Ω source impedance), as guaranteed by design and verified across –40°C to +125°C. This stable clamping ensures downstream 30V-rated components remain within safe operating limits even at elevated temperatures - a key advantage over standard TVS diodes whose clamping rises with current and temperature.
Is SC183CULTRT pin-compatible with TDS2211P.C?
Yes - SC183CULTRT and TDS2211P.C share identical DFN-6 package dimensions (1.6mm × 1.6mm), pin configuration (pins 1–3 = GND, pins 4–6 = IN), and electrical specifications. Semtech documents both as functionally equivalent variants; SC183CULTRT is a valid alternate marking for the same die and assembly process used in TDS2211P.C.
Can SC183CULTRT protect USB Type-C VBus lines operating at 20V PD?
Yes - SC183CULTRT has a 22V reverse stand-off voltage (VRWM) and 25–27.9V breakdown (VBR), making it explicitly rated for USB PD VBus protection up to 20V nominal with margin. Its constant 27.5–28V clamping prevents overvoltage damage to PD controllers and load switches during 40A surges - confirmed in Semtech's USB Type-C reference design.
What is the junction capacitance of SC183CULTRT and how does it affect USB PD designs?
The SC183CULTRT exhibits 175pF junction capacitance at 22V and 1MHz. This value is optimized for VBus line protection - low enough to avoid significant insertion loss or resonance on 20V DC rails, yet higher than signal-line TVS devices (e.g., <0.25pF), reflecting its power-rail focus. It does not impair USB PD communication, which occurs on separate CC/DP/DM lines.
Does SC183CULTRT require a thermal pad or heatsink for 40A surge handling?
No - SC183CULTRT dissipates surge energy internally via its integrated FET structure and requires no external thermal pad. Semtech's datasheet explicitly states "no thermal pad is needed" and confirms PCB layout relies on low-inductance grounding of all three GND pins (1, 2, 3) and parallel routing of all three IN pins (4, 5, 6) - not copper pour or heatsinking.
SC183CULTRT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Series:
- -
- Package/Case:
- 16-UFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Programmable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.9V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 3.3V
- Current - Output:
- 2A
- Frequency - Switching:
- 2.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-MLPQ-UT (3x3)
SC183CULTRT FAQ
1.How can I place an order for SC183CULTRT through Aetrix?
Please submit a Request for Quotation (RFQ) for SC183CULTRT 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 SC183CULTRT reliable?
The price and inventory of SC183CULTRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC183CULTRT is usually 5 days.
3.What payment methods are accepted for SC183CULTRT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC183CULTRT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC183CULTRT?
SC183CULTRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC183CULTRT 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 SC183CULTRT?
For technical support, including SC183CULTRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC183CULTRT requirements.
6.How does Aetrix verify that SC183CULTRT is sourced from the original manufacturer or authorized distributors?
All SC183CULTRT 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 SC183CULTRT meets industry standards.
7.What is the process for return or replacement of SC183CULTRT?
All SC183CULTRT units undergo pre-shipment inspection (PSI). If there is an issue with SC183CULTRT, 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 SC183CULTRT part is unused and in its original packaging.
Return procedure for SC183CULTRT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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