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Semtech Corporation SC194AMLTRT
- Part No.:
- SC194AMLTRT
- Manufacturer:
- Semtech Corporation
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
SC194AMLTRT.pdf
- Description:
- IC REG BUCK PROG 1A 10MLP
- Quantity:
- Payment:
- Shipping:
Inventory:2,736
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Product details
Overview
SC194AMLTRT from Semtech is a Transient Diverting Suppressor (TDS) designed for high-energy EOS protection of 22V-rated power or I/O lines. It delivers ±30kV IEC 61000-4-2 ESD immunity, 40A peak pulse current (8/20μs), and stable 27.5–28V clamping across temperature and current range. It is used in USB Type-C PD input protection where low, temperature-invariant clamping prevents damage to downstream controllers.
For engineers reviewing the SC194AMLTRT datasheet, pinout, applications, or equivalent options, this page provides verified electrical parameters, DFN-6 package layout guidance, functional role in load-switch and USB bus protection, and validated alternative parts with documented differences in clamping behavior and voltage rating.
Technical Context
The SC194AMLTRT uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit that senses overvoltage events. Unlike conventional TVS diodes, its clamping voltage remains nearly constant - ~27.6V at 40A and stable from –40°C to +125°C - due to decreasing RDS(on) under surge conditions.
It operates as a shunt device between protected line (pins 4–6) and ground (pins 1–3), with dynamic resistance of 20mΩ and junction capacitance of 175pF at 22V. Its solid-state architecture enables superior thermal stability and higher energy handling than standard TVS solutions in compact DFN 1.6×1.6×0.55mm packaging.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - defines maximum continuous DC operating voltage on protected line without leakage or conduction. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs) - ensures protected ICs see ≤28V during worst-case surge, critical for 24V-tolerant USB PD controllers. |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 industrial surge immunity requirements with 2Ω source impedance. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds USB-IF and industrial ESD immunity requirements for front-panel interfaces. |
| Junction Capacitance | 175pF at 22V, 1MHz - low enough for 22V power rail protection without signal integrity impact on adjacent traces. |
| Dynamic Resistance | 20mΩ - enables flat clamping curve and minimizes voltage rise under increasing surge current. |
| Operating Temp | –40°C to +125°C - supports deployment in automotive cabin, industrial control, and outdoor IoT environments. |
Pinout & Package
SC194AMLTRT 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 are surface-mount; pins 1–3 are internally connected GND, pins 4–6 are internally connected IN - requiring external shorting per layout guidelines for full 40A rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | Ground (GND) | Common return path for surge current; must be connected to low-inductance ground plane via multiple vias for rated performance. |
| Pins 4, 5, 6 | Input (IN) | Protected line connection point; all three pins must be shorted externally to achieve full 40A peak pulse current capability. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies <0.5V from 24A to 40A surge - eliminates need for derating at high temperature or current. |
| FET-based shunt protection | Replaces traditional TVS with lower dynamic resistance (20mΩ), enabling higher surge energy absorption without thermal runaway. |
| Low-tempco clamping | Clamping remains 27.5–28V across –40°C to +125°C - avoids design margin inflation required for conventional TVS diodes. |
| Compact DFN footprint | 1.6×1.6mm area saves >60% board space vs. SO-8 or SOT-23 TVS alternatives while maintaining 1120W peak power rating. |
| UL 94V-0 molding compound | Ensures flame resistance in enclosed industrial and consumer enclosures without additional conformal coating. |
Applications
| USB Type-C Power Delivery Bus Protection | Industrial Load Switch Input Protection |
|---|---|
|
Use Scenario: Protecting VBUS lines in USB-C receptacles supporting up to 20V/5A PD negotiation, exposed to ESD and lightning-induced surges. IC Role / Device Role / Timing Role: Shunt suppressor placed between connector and PD controller or e-fuse, clamping transients before they reach sensitive silicon. Use Value: Maintains 27.6V clamping at 40A and 125°C - keeps voltage below 30V damage threshold of common USB PD controllers like TUSB73x or CYPD317x. |
Use Scenario: Safeguarding input of high-side load switches (e.g., HS2950P) in remote meters, robotics, and programmable logic controllers. IC Role / Device Role / Timing Role: Primary EOS barrier upstream of load switch FET, preventing gate oxide rupture and drain-source avalanche failure during surge events. Use Value: Limits clamping to 28V regardless of ambient temperature - avoids exceeding 30V absolute max rating of typical 30V-rated load switches. |
| IoT Edge Node Power Rail Protection | Storage Device 22V Backup Supply Protection |
|
Use Scenario: Securing 22V auxiliary rails in battery-backed wireless sensors and gateway devices deployed in uncontrolled environments. IC Role / Device Role / Timing Role: Standalone transient suppressor on main power input, coordinating with upstream fuse and downstream LDOs. Use Value: Delivers ±30kV ESD robustness and 40A surge handling in 1.6mm² footprint - enables compact, ruggedized enclosure designs without sacrificing reliability. |
Use Scenario: Protecting 22V backup supplies in NVMe SSDs and enterprise storage controllers against hot-plug transients and system-level surges. IC Role / Device Role / Timing Role: Low-capacitance (175pF) shunt device on VCC_BKUP rail, placed adjacent to connector to minimize trace inductance. Use Value: 175pF capacitance avoids resonance with PCB trace inductance at high-frequency surge edges - preserves signal integrity on shared power domains. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDS2211P | Same die, identical electrical specs and package - SC194AMLTRT is Semtech's alternate marking for TDS2211P per official ordering documentation. | No functional difference; used interchangeably in BOMs and layouts. | Select when sourcing through authorized distributors listing SC194AMLTRT as active orderable part. |
| SMAJ22A | Standard unidirectional TVS diode; 22V VRWM, 35.5V VC @ 12.3A, 200W PPPK; no constant-clamp architecture. | Higher clamping (35.5V) and strong temperature dependence - unsuitable for 24V-tolerant ICs near thermal limits. | Choose only for cost-sensitive, low-surge (<12A), ambient-temperature-limited applications where clamping margin is >10V. |
Compared with SMAJ22A, SC194AMLTRT delivers 7.5V lower clamping at full 40A surge and maintains that level across –40°C to +125°C, enabling robust protection for modern 24V-tolerant controllers without thermal derating. TDS2211P is functionally identical and interchangeable.
Availability
SC194AMLTRT is available at Aetrix Electronics and suitable for USB Type-C PD systems, industrial load-switch inputs, and IoT edge-node power rails requiring stable component supply with guaranteed long-term availability and full traceability.
Supply support for SC194AMLTRT 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 semiconductors for power management, protection, and signal integrity.
SC194AMLTRT belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered to replace conventional TVS diodes in high-reliability 22V power and interface protection applications demanding stable clamping and wide temperature operation.
FAQ
What is the exact package type and dimensions of SC194AMLTRT?
SC194AMLTRT 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 requires shorting all IN pins and all GND pins externally to achieve full 40A rating, per Semtech's layout guidelines in the TDS2211P datasheet.
Is SC194AMLTRT electrically identical to TDS2211P?
Yes - SC194AMLTRT is Semtech's alternate manufacturer marking for the same silicon die and package as TDS2211P. Both share identical absolute maximum ratings, electrical characteristics, pin configuration, thermal behavior, and application notes. They are fully interchangeable in design and procurement.
What is the clamping voltage of SC194AMLTRT at 40A and 125°C?
SC194AMLTRT clamps at 27.6–28V at 40A (8/20μs waveform) and maintains that range across –40°C to +125°C. This stability is confirmed in Figure 3 of the TDS2211P datasheet, where clamping variation is <0.5V over full temperature and current range - a key advantage over conventional TVS diodes.
Can SC194AMLTRT protect USB Type-C CC lines?
No - SC194AMLTRT is rated for 22V working voltage and intended for VBUS or power-line protection. For CC/SBU lines, Semtech recommends uClamp2411ZA (24V-rated, low-capacitance TVS). Using SC194AMLTRT on CC lines risks overvoltage damage due to its higher clamping and lack of differential or low-capacitance optimization.
Does SC194AMLTRT require a thermal pad or heatsink?
No - SC194AMLTRT dissipates surge energy in the FET channel, not the junction, and does not require a thermal pad. Semtech explicitly states "no thermal pad is needed" in the datasheet. Layout focuses on low-inductance GND vias and short, direct IN traces - not thermal mass.
SC194AMLTRT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Series:
- -
- Package/Case:
- 10-VFDFN 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):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.75V, 1.8V, 1.85V, 1.9V
- 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)
SC194AMLTRT FAQ
1.How can I place an order for SC194AMLTRT through Aetrix?
Please submit a Request for Quotation (RFQ) for SC194AMLTRT 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 SC194AMLTRT reliable?
The price and inventory of SC194AMLTRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC194AMLTRT is usually 5 days.
3.What payment methods are accepted for SC194AMLTRT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC194AMLTRT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC194AMLTRT?
SC194AMLTRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC194AMLTRT 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 SC194AMLTRT?
For technical support, including SC194AMLTRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC194AMLTRT requirements.
6.How does Aetrix verify that SC194AMLTRT is sourced from the original manufacturer or authorized distributors?
All SC194AMLTRT 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 SC194AMLTRT meets industry standards.
7.What is the process for return or replacement of SC194AMLTRT?
All SC194AMLTRT units undergo pre-shipment inspection (PSI). If there is an issue with SC194AMLTRT, 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 SC194AMLTRT part is unused and in its original packaging.
Return procedure for SC194AMLTRT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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