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Semtech Corporation SC194BMLTRT
- Part No.:
- SC194BMLTRT
- Manufacturer:
- Semtech Corporation
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
SC194BMLTRT.pdf
- Description:
- IC REG BUCK PROG 1A 10MLP
- Quantity:
- Payment:
- Shipping:
Inventory:2,997
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Product details
Overview
SC194BMLTRT from Semtech is a transient diverting suppressor designed for high-energy EOS protection of 22V-rated power or I/O lines, featuring ±30kV IEC 61000-4-2 ESD immunity, 40A (8/20μs) peak pulse current handling, 27.5–28V clamping voltage at 40A, and 20mΩ dynamic resistance. It protects USB Type-C power delivery buses, load switch inputs, and industrial I/O interfaces where stable clamping under temperature and current stress is critical.
For engineers reviewing the SC194BMLTRT datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specifications, DFN-6 package layout guidance, real-world clamping behavior across temperature and current, and validated alternatives for 22V EOS protection in space-constrained designs.
Technical Context
The SC194BMLTRT 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-from 24A to 40A and across –40°C to +125°C due to decreasing RDS(on) under surge conditions.
It operates with a 22V reverse stand-off voltage (VRWM), 25–27.9V breakdown (VBR), and exhibits only 175pF junction capacitance at 22V/1MHz-enabling use on high-speed power rails without signal integrity degradation. Its 6-pin DFN package integrates three parallel input terminals (pins 4–6) and three ground terminals (pins 1–3) to minimize parasitic inductance and maximize surge current sharing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V reverse stand-off (VRWM) - defines maximum continuous DC bus voltage before leakage rises significantly. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs + 1.2/50μs combo waveform) - ensures protected ICs (e.g., USB PD controllers) remain below damage thresholds. |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 surge immunity for industrial equipment and USB PD systems. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds automotive and industrial ESD requirements without derating. |
| Dynamic Resistance | 20mΩ (measured 1–40A, 8/20μs) - enables flat clamping curve and low voltage overshoot during fast transients. |
| Junction Capacitance | 175pF at 22V/1MHz - low enough to avoid signal distortion on 20V power rails while maintaining robust surge capability. |
Pinout & Package
SC194BMLTRT 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-three GND pins for low-inductance return path and three IN pins for parallel surge current distribution-to achieve rated 40A performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | Ground | Low-inductance return path; all three must be connected to solid ground plane via multiple vias for full 40A rating. |
| Pins 4, 5, 6 | Input / Protected Line | Parallel-connected surge input terminals; direct connection to VBus or power rail requiring 22V EOS protection. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage stays within 27.5–28V from 24A to 40A and –40°C to +125°C-eliminates thermal derating calculations required for TVS diodes. |
| Surge-rated FET protection | Replaces pn-junction TVS with active shunt FET, reducing clamping voltage by ~10V vs. comparable 22V TVS at 125°C (e.g., 38V → 27V). |
| Low dynamic resistance | 20mΩ enables minimal voltage overshoot during sub-microsecond transients-critical for protecting sensitive load switches and PD controllers. |
| High EFT immunity | ±4kV per IEC 61000-4-4 (5/50ns, 100kHz/5kHz bursts) - sustains operation in electrically noisy industrial environments without latch-up. |
Applications
| USB Type-C Power Delivery Protection | Industrial Load Switch Input Protection |
|---|---|
|
Use Scenario: Protecting 20V–22V VBus lines in USB-C ports supporting Power Delivery up to 100W. IC Role / Device Role / Timing Role: Primary EOS shunt device placed at connector entry point to clamp lightning-induced surges and ESD before reaching PD controller and multiplexer. Use Value: Maintains 27.5–28V clamping across temperature-prevents false overvoltage shutdowns and eliminates need for oversized TVS derating at high ambient temperatures. |
Use Scenario: Safeguarding enable and input pins of industrial-grade load switches (e.g., HS2950P) in remote meters and robotics. IC Role / Device Role / Timing Role: Front-end transient diverter that limits voltage seen by internal FET gate oxide during 1kV/42Ω surges per IEC 61000-4-5. Use Value: Prevents permanent gate oxide damage by holding clamping voltage below 30V-extending field lifetime of load switches operating in ungrounded or outdoor installations. |
| IoT Edge Node Power Rail Protection | Storage Device 22V Backup Power Protection |
|
Use Scenario: Securing 22V auxiliary power inputs in battery-backed IoT gateways exposed to ESD during field servicing. IC Role / Device Role / Timing Role: Single-component solution replacing multi-stage TVS+MOV networks-reducing BOM count and PCB area by >60%. Use Value: 175pF capacitance avoids filtering interference on 22V backup rails while delivering ±30kV ESD robustness-enabling compact, certified designs. |
Use Scenario: Protecting 22V supercapacitor or LiFePO4 backup power inputs in enterprise SSDs and NAS enclosures. IC Role / Device Role / Timing Role: High-energy transient suppressor placed between backup source and PMIC input to prevent latch-up during hot-plug events. Use Value: 1120W peak pulse power rating handles repeated 40A surges without parametric shift-ensuring long-term reliability in 24/7 storage applications. |
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" - confirmed pin-to-pin and functionally equivalent per Semtech documentation. | No functional difference; TDS2211P.C is the standard orderable variant with 3,000-unit tape-and-reel packaging. | Select TDS2211P.C when sourcing directly from Semtech or authorized distributors with standard reel logistics. |
| uClamp2411ZA.TCT | 24V working voltage, lower 22A peak pulse rating, 0.25pF capacitance - optimized for CC/SBU lines, not power rails. | Designed for low-capacitance data-line protection (e.g., USB-C CC pins); unsuitable for 22V power rail clamping due to lower IPP and higher VC. | Use uClamp2411ZA.TCT only for auxiliary signal lines-not as a substitute for SC194BMLTRT on VBus or load switch inputs. |
Compared with TDS2211P.C, SC194BMLTRT shares identical electrical performance and mechanical form factor but may differ in traceability or reel labeling; compared with uClamp2411ZA.TCT, SC194BMLTRT delivers 82% higher peak current capability and 10V lower clamping-making it the sole suitable option for 22V power rail EOS protection.
Availability
SC194BMLTRT is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch inputs, and IoT edge node power rails requiring stable component supply with guaranteed long-term manufacturability and full compliance documentation.
Supply support for SC194BMLTRT 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 high-performance analog and mixed-signal ICs for precision sensing, protection, and signal integrity.
The SC194BMLTRT belongs to Semtech's Transient Diverting Suppressor (TDS) product line-engineered to replace conventional TVS diodes in high-reliability 20–30V power rail protection applications where stable clamping across temperature and current is non-negotiable.
FAQ
What is the maximum continuous operating voltage for SC194BMLTRT?
The SC194BMLTRT has a reverse stand-off voltage (VRWM) of 22V, meaning it reliably blocks up to 22V DC or RMS AC continuously without significant leakage. At 22V, reverse leakage is specified at 130–600nA-well within safe limits for most 22V power rail monitoring and protection circuits. Exceeding 22V risks premature conduction and accelerated wear.
Does SC194BMLTRT require a thermal pad or heatsink on the PCB?
No, SC194BMLTRT does not require an external thermal pad or heatsink. Its DFN-6 package dissipates surge energy primarily through the copper ground plane via pins 1–3, and the datasheet explicitly states "no thermal pad is needed" because transient energy is absorbed during short-duration events-not steady-state power dissipation. Proper PCB layout with multiple ground vias is sufficient.
Can SC194BMLTRT be used to protect high-speed data lines like USB SuperSpeed or PCIe?
No, SC194BMLTRT is not suitable for high-speed data lines. Its 175pF junction capacitance would severely degrade signal integrity on differential pairs operating above ~100MHz. It is specifically designed for 22V power rails and low-frequency I/O lines. For USB SS or DP/DM lines, Semtech recommends ultra-low-capacitance devices like RClamp3371ZC (<0.25pF).
How does SC194BMLTRT's clamping performance compare to standard TVS diodes at elevated temperature?
At +125°C, SC194BMLTRT maintains a clamping voltage of ~27V at 40A-unchanged from its 25°C value. In contrast, a typical 22V TVS diode's clamping voltage rises to ~38V at the same condition due to positive temperature coefficient of dynamic resistance. This 11V margin makes SC194BMLTRT uniquely reliable for thermally demanding industrial and automotive under-hood applications.
Is SC194BMLTRT compatible with lead-free reflow soldering processes?
Yes, SC194BMLTRT is fully compatible with standard lead-free reflow profiles (J-STD-020). Its DFN package uses lead-free terminal finish and is rated for peak reflow temperatures up to 260°C. The molding compound meets UL 94V-0 flammability rating, and the device is RoHS/WEEE compliant-ensuring compatibility with modern automated assembly lines.
SC194BMLTRT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Programmable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.5V, 3V, 3.3V, 3.6V
- Voltage - Output (Max):
- -
- Current - Output:
- 1A
- Frequency - Switching:
- 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MLP (3x3)
SC194BMLTRT FAQ
1.How can I place an order for SC194BMLTRT through Aetrix?
Please submit a Request for Quotation (RFQ) for SC194BMLTRT 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 SC194BMLTRT reliable?
The price and inventory of SC194BMLTRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC194BMLTRT is usually 5 days.
3.What payment methods are accepted for SC194BMLTRT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC194BMLTRT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC194BMLTRT?
SC194BMLTRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC194BMLTRT 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 SC194BMLTRT?
For technical support, including SC194BMLTRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC194BMLTRT requirements.
6.How does Aetrix verify that SC194BMLTRT is sourced from the original manufacturer or authorized distributors?
All SC194BMLTRT 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 SC194BMLTRT meets industry standards.
7.What is the process for return or replacement of SC194BMLTRT?
All SC194BMLTRT units undergo pre-shipment inspection (PSI). If there is an issue with SC194BMLTRT, 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 SC194BMLTRT part is unused and in its original packaging.
Return procedure for SC194BMLTRT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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