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Semtech Corporation SC4501MLTRT
- Part No.:
- SC4501MLTRT
- Manufacturer:
- Semtech Corporation
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
SC4501MLTRT.pdf
- Description:
- IC REG BST FLYBACK ADJ 2A 10MLPD
- Quantity:
- Payment:
- Shipping:
Inventory:1,752
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Product details
Overview
SC4501MLTRT 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), 27.5–28V clamping voltage at 40A, and 20mΩ dynamic resistance - enabling robust protection in USB PD and industrial load-switch input circuits.
For engineers reviewing the SC4501MLTRT datasheet, pinout, applications, or equivalent options, key selection criteria include clamping stability across temperature (-40°C to +125°C), low 175pF junction capacitance at 22V, and DFN 1.6×1.6mm 6-lead package compatibility with space-constrained USB Type-C and IoT board layouts.
Technical Context
The SC4501MLTRT uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit when transient voltage exceeds breakdown. Unlike conventional TVS diodes, its clamping voltage remains nearly constant across 1–40A (8/20μs) due to decreasing RDS(on) under surge conditions.
It operates with reverse stand-off voltage of 22V, breakdown voltage of 25–27.9V, and maintains stable 27.5–28V clamping up to 40A under 1.2/50μs–8/20μs combination waveforms (RS = 2Ω). Its 175pF capacitance at 22V and 1MHz supports high-speed bus integrity without signal distortion.
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 downstream ICs (e.g., USB PD controllers) remain below damage threshold during worst-case surges. |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 industrial surge immunity requirements for 22V systems. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - provides system-level ESD robustness without external shielding or layout reinforcement. |
| Junction Capacitance | 175pF at 22V, 1MHz - low enough to avoid signal integrity degradation on USB PD VBUS and load-switch input lines. |
| Dynamic Resistance | 20mΩ - enables flat clamping response and minimizes voltage overshoot during fast-rising transients. |
Pinout & Package
SC4501MLTRT is housed in a Pb-free, RoHS-compliant DFN 1.6mm × 1.6mm × 0.55mm 6-lead package with exposed thermal pad not required (energy dissipated in silicon).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground return path for surge current; all three pins must be connected to maximize current handling and minimize inductance. |
| 4, 5, 6 | IN | Protected line input (e.g., VBUS, load-switch VIN); parallel connection ensures uniform current sharing and optimal 40A rating. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.5V from 24A to 40A - eliminates design margin inflation needed with traditional TVS diodes. |
| Temperature-stable protection | Clamping remains 27.5–28V from -40°C to +125°C - removes thermal derating calculations for industrial ambient environments. |
| Low dynamic resistance | 20mΩ enables sub-1V overshoot during 100A/μs dV/dt events - critical for protecting sensitive gate drivers and PMIC inputs. |
| High-energy EFT immunity | ±4kV per IEC 61000-4-4 (5/50ns, 100kHz/5kHz) - sustains operation during repetitive burst noise in motor drives and PLC I/O modules. |
Applications
| USB Type-C Power Delivery Protection | Industrial Load-Switch Input Protection |
|---|---|
Use Scenario: Protecting 20V–22V VBUS lines in USB-C receptacles supporting up to 100W PD negotiation. IC Role / Device Role / Timing Role: Primary EOS shunt device placed between connector and PD controller or load switch, responding within nanoseconds to overvoltage events. Use Value: Maintains 27.5–28V clamping across full temperature range, preventing false overvoltage shutdowns and ensuring PD communication continuity during surge stress. |
Use Scenario: Safeguarding input terminals of industrial-grade load switches (e.g., HS2950P) exposed to lightning-induced surges in remote meters or robotics. IC Role / Device Role / Timing Role: Front-end transient suppressor that diverts surge energy before it reaches the load switch's internal FET, preserving safe operating area (SOA). Use Value: Limits voltage across load switch drain-source to <28V during 40A surges, avoiding avalanche failure and enabling use of lower-voltage-rated, cost-optimized switches. |
| IoT Edge Node Power Bus Protection | Storage Device 22V Rail Protection |
Use Scenario: Securing 22V auxiliary rails in battery-backed IoT gateways subjected to ESD during field servicing and conducted surges via long sensor cables. IC Role / Device Role / Timing Role: Single-device solution replacing multi-stage TVS+MOV networks, placed directly at power entry point. Use Value: 175pF capacitance avoids filtering interference on always-on monitoring signals; ±30kV ESD rating eliminates need for secondary touch-point protection. |
Use Scenario: Protecting 22V backup or auxiliary supply rails in NVMe SSD enclosures and enterprise storage controllers exposed to hot-plug transients. IC Role / Device Role / Timing Role: High-reliability clamp on non-data-critical power paths where low capacitance and repeatable clamping are mandatory for qualification. Use Value: 1120W peak pulse power rating supports multiple surge events without parameter drift, meeting Telcordia GR-1089-CORE compliance for telecom storage subsystems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDS2211P | Identical electrical specs, pinout, and package; same Semtech product family - direct replacement with identical marking and reel packaging. | No functional difference; validated for identical USB PD, load-switch, and industrial use cases per Semtech application notes. | Select when requiring exact Semtech documentation traceability, dual-sourcing from same fab, or alignment with existing TDS2211P BOMs. |
| uClamp2411ZA | 24V working voltage, ±30kV ESD, but only 12A IPP (8/20μs); higher 30V clamping at rated current; SOD-323 package. | Limited to CC/SBU lines or low-energy 24V rails - insufficient for 40A VBUS protection or industrial surge standards. | Choose only for space-constrained, low-current auxiliary lines where 24V tolerance and ultra-low capacitance (<0.5pF) outweigh peak current needs. |
Compared with TDS2211P, SC4501MLTRT offers identical performance and form factor, enabling seamless drop-in qualification; versus uClamp2411ZA, it delivers >3× peak current capability and tighter clamping control - making it the sole viable option for 22V power rail protection requiring IEC 61000-4-5 compliance.
Availability
SC4501MLTRT is available at Aetrix Electronics and suitable for USB Type-C PD designs, industrial load-switch interfaces, and IoT edge node power buses requiring stable component supply with full lifecycle support and traceable sourcing.
Supply support for SC4501MLTRT 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 protection, sensing, and signal integrity.
SC4501MLTRT belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered specifically to replace conventional TVS diodes in high-energy EOS applications demanding stable clamping across temperature and current extremes.
FAQ
What is the maximum continuous operating voltage for SC4501MLTRT?
The SC4501MLTRT has a reverse stand-off voltage (VRWM) of 22V, meaning it can continuously block up to 22V DC without significant leakage or conduction. This makes SC4501MLTRT suitable for 20V USB PD VBUS and other 22V-rated industrial power rails where sustained voltage integrity is required between transient events.
Does SC4501MLTRT require a thermal pad on the PCB?
No, SC4501MLTRT does not require a thermal pad. Its DFN 1.6×1.6mm package dissipates surge energy internally via the silicon FET structure, not through conduction to the board. Semtech explicitly states "no thermal pad is needed" in the datasheet, and layout guidelines emphasize low-inductance GND vias instead of copper pour under the device.
How does SC4501MLTRT differ from standard TVS diodes in clamping behavior?
Unlike standard TVS diodes whose clamping voltage rises linearly with peak current (VC = VBR + IPP × RDYN), SC4501MLTRT uses a triggered FET to maintain near-constant clamping - 27.5–28V from 24A to 40A. This eliminates the need to overspecify IPP just to meet voltage thresholds, a key advantage of SC4501MLTRT in precision protection designs.
Can SC4501MLTRT be used on high-speed data lines like USB SS or PCIe?
No, SC4501MLTRT is not intended for high-speed data lines. Its 175pF junction capacitance is optimized for power and low-speed I/O protection (e.g., VBUS, CC, SBU), not signal integrity-critical paths. For USB SuperSpeed or PCIe lanes, Semtech recommends low-capacitance devices like RClamp3371ZC (<0.25pF), not SC4501MLTRT.
What is the recommended PCB layout for SC4501MLTRT to achieve full 40A rating?
To achieve the full 40A (8/20μs) rating, all three IN pins (4, 5, 6) must be shorted together with a single low-inductance trace to the protected line, and all three GND pins (1, 2, 3) must connect to a solid ground plane using ≥3 vias. SC4501MLTRT must be placed within 5mm of the connector - longer traces add inductance that degrades clamping performance and risks overshoot.
SC4501MLTRT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost, Flyback, SEPIC
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1.4V
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 1.4V
- Voltage - Output (Max):
- 32V
- Current - Output:
- 2A (Switch)
- Frequency - Switching:
- 1.5MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MLPD (3x3)
SC4501MLTRT FAQ
1.How can I place an order for SC4501MLTRT through Aetrix?
Please submit a Request for Quotation (RFQ) for SC4501MLTRT 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 SC4501MLTRT reliable?
The price and inventory of SC4501MLTRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC4501MLTRT is usually 5 days.
3.What payment methods are accepted for SC4501MLTRT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC4501MLTRT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC4501MLTRT?
SC4501MLTRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC4501MLTRT 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 SC4501MLTRT?
For technical support, including SC4501MLTRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC4501MLTRT requirements.
6.How does Aetrix verify that SC4501MLTRT is sourced from the original manufacturer or authorized distributors?
All SC4501MLTRT 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 SC4501MLTRT meets industry standards.
7.What is the process for return or replacement of SC4501MLTRT?
All SC4501MLTRT units undergo pre-shipment inspection (PSI). If there is an issue with SC4501MLTRT, 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 SC4501MLTRT part is unused and in its original packaging.
Return procedure for SC4501MLTRT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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