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Semtech Corporation SC284PULTRC
- Part No.:
- SC284PULTRC
- Manufacturer:
- Semtech Corporation
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
SC284PULTRC.pdf
- Description:
- IC REG BUCK PROG 2A DL 20MLPQ
- Quantity:
- Payment:
- Shipping:
Inventory:1,930
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Product details
Overview
SC284PULTRC from Semtech is a Transient Diverting Suppressor (TDS) designed for high-energy EOS protection of single 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 - enabling robust USB PD and industrial load switch input protection.
For engineers reviewing the SC284PULTRC datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage stability under surge, low dynamic resistance (<20 mΩ), junction capacitance (175 pF), and DFN 1.6×1.6mm 6-lead package compatibility with high-density USB Type-C and IoT board layouts.
Technical Context
The SC284PULTRC 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 at both 24A and 40A (1.2/50μs + 8/20μs combination waveform) - due to decreasing RDS(on) under surge.
It operates from −40°C to +125°C with reverse stand-off voltage of 22V, breakdown voltage of 25–27.9V, and ultra-low leakage (<600 nA at 22V). Its 175 pF junction capacitance and 20 mΩ dynamic resistance support high-speed bus protection without signal integrity degradation in USB PD and industrial power rail applications.
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 lightning 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) - exceeds automotive and industrial ESD test levels for connector-facing protection. |
| Junction Capacitance | 175 pF @ 22V, 1MHz - low enough to avoid signal distortion on 20V power rails and moderate-speed control lines. |
| Dynamic Resistance | 20 mΩ - enables flat clamping response and minimizes voltage overshoot during fast-rising transients. |
Pinout & Package
SC284PULTRC is housed in a RoHS-compliant DFN 1.6 mm × 1.6 mm × 0.55 mm 6-lead package with exposed thermal pad (no solder mask defined). All pins must be connected - three GND pins (1–3) and three IN pins (4–6) - to achieve rated 40A surge capability and minimize parasitic inductance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground return path for surge current; all three must be connected to PCB ground plane via multiple vias for lowest inductance. |
| 4, 5, 6 | IN | Protected line input - connects directly to VBus or power/data line; parallel connection increases current sharing and thermal margin. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies <0.5V from 24A to 40A - eliminates design margin inflation needed with conventional TVS diodes. |
| FET-based shunt protection | Surge energy dissipated in low-RDS(on) channel instead of PN junction - improves reliability and thermal stability over temperature. |
| Low dynamic resistance | 20 mΩ enables sub-1V overshoot during 100 A/μs dI/dt events - critical for protecting sensitive load switches and PMICs. |
| Wide temperature operation | Stable clamping from −40°C to +125°C - supports industrial equipment and automotive-adjacent USB PD applications. |
Applications
| USB Type-C Power Delivery | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting 20V VBus lines in USB-C receptacles against ESD, lightning-induced surges, and hot-plug transients. IC Role / Device Role / Timing Role: Primary EOS suppressor placed between connector and USB PD controller or load switch input. Use Value: Maintains 27.5–28V clamping across −40°C to +125°C, preventing overvoltage damage to PD controllers even at full ambient temperature. |
Use Scenario: Safeguarding enable and input pins of industrial-grade load switches (e.g., HS2950P) against 1kV/42Ω surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Front-end transient shunt that clamps before internal FET gate oxide breakdown occurs. Use Value: Limits stress on load switch's integrated MOSFET by holding clamping voltage well below its absolute maximum VDS rating. |
| IoT Edge Node Power Rails | Storage Device 22V Backup Supplies |
Use Scenario: Securing 22V auxiliary power inputs in battery-backed smart sensors and remote meters exposed to field ESD and induced surges. IC Role / Device Role / Timing Role: Single-device solution replacing multi-stage TVS+MOV designs for space-constrained edge nodes. Use Value: 1.6×1.6mm footprint saves >60% board area vs. discrete TVS+capacitor solutions while delivering higher surge rating. |
Use Scenario: Protecting 22V hold-up capacitor inputs in NVMe SSDs and enterprise storage controllers during power cycling and ESD events. IC Role / Device Role / Timing Role: Low-capacitance (175 pF) transient suppressor placed directly at connector entry point. Use Value: Prevents data corruption and controller latch-up by limiting transient overvoltage to ≤28V without degrading 100+ MHz signal integrity on adjacent traces. |
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 1.6×1.6mm package, and identical marking code T22 - confirmed drop-in replacement per Semtech ordering documentation. | No functional difference; used interchangeably in USB PD reference designs and industrial schematics. | Select TDS2211P.C when requiring standard tape-and-reel packaging (3,000 pcs/reel) and official Semtech traceability. |
| uClamp2411ZA | Lower working voltage (24V), lower clamping (≈26V), but only rated for 12A IPP and ±30kV ESD - not suitable for 40A surge environments. | Targeted at CC/SBU lines in USB-C, not main VBus; lacks thermal robustness for sustained 22V power rail duty. | Use uClamp2411ZA only for auxiliary signal lines; SC284PULTRC remains required for primary 22V bus protection. |
Compared with TDS2211P.C, SC284PULTRC offers identical performance and form factor but may differ in reel quantity or date-code traceability; compared with uClamp2411ZA, SC284PULTRC provides 3.3× higher surge current rating and validated 40A capability essential for VBus-level protection.
Availability
SC284PULTRC is available at Aetrix Electronics and suitable for USB Type-C Power Delivery, industrial load switch input protection, and IoT edge node power rails requiring stable component supply, consistent lead-time visibility, and long-term lifecycle assurance.
Supply support for SC284PULTRC 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.
SC284PULTRC belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered to replace conventional TVS diodes in high-energy EOS applications where stable clamping, temperature resilience, and compact size are critical.
FAQ
What is the maximum continuous operating voltage for SC284PULTRC?
The SC284PULTRC 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 SC284PULTRC ideal for protecting 20V USB PD VBus lines and other 22V-rated industrial power rails where sustained voltage exposure occurs.
Does SC284PULTRC require a thermal pad on the PCB?
No, SC284PULTRC does not require a thermal pad. Its DFN package dissipates surge energy through the copper-connected GND pins (1–3) and IN pins (4–6); Semtech explicitly states no thermal pad is needed. Instead, low-inductance grounding via multiple vias to an inner ground plane is critical for achieving its rated 40A surge performance.
How does SC284PULTRC differ from standard TVS diodes in clamping behavior?
Unlike standard TVS diodes whose clamping voltage rises linearly with peak pulse current (VC = VBR + IPP × RDYN), SC284PULTRC maintains near-constant clamping (~27.5–28V) from 24A to 40A due to its FET-based shunt architecture and decreasing RDS(on). This eliminates overdesign margin typically needed with TVS devices.
Can SC284PULTRC be used on high-speed data lines like USB SuperSpeed?
No, SC284PULTRC is not intended for high-speed data lines. With 175 pF junction capacitance, it is optimized for 22V power rails and moderate-speed control signals. For USB SuperSpeed (TX/RX), Semtech recommends low-capacitance devices like RClamp3371ZC (<0.25 pF); SC284PULTRC should be reserved for VBus or load switch input protection only.
Is SC284PULTRC compatible with lead-free reflow processes?
Yes, SC284PULTRC is fully compatible with standard lead-free reflow profiles. Its DFN package features lead-free finish and UL 94V-0 molding compound, and Semtech specifies compliance with JEDEC J-STD-020 moisture sensitivity level (MSL) 1 - allowing unlimited floor life and standard Pb-free soldering without pre-bake.
SC284PULTRC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Series:
- -
- Package/Case:
- 20-VFQFN 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:
- 2
- Voltage - Input (Min):
- 2.75V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- 3.3V
- Current - Output:
- 2A
- Frequency - Switching:
- 2.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-MLPQ-UT (3x3)
SC284PULTRC FAQ
1.How can I place an order for SC284PULTRC through Aetrix?
Please submit a Request for Quotation (RFQ) for SC284PULTRC 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 SC284PULTRC reliable?
The price and inventory of SC284PULTRC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC284PULTRC is usually 5 days.
3.What payment methods are accepted for SC284PULTRC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC284PULTRC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC284PULTRC?
SC284PULTRC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC284PULTRC 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 SC284PULTRC?
For technical support, including SC284PULTRC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC284PULTRC requirements.
6.How does Aetrix verify that SC284PULTRC is sourced from the original manufacturer or authorized distributors?
All SC284PULTRC 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 SC284PULTRC meets industry standards.
7.What is the process for return or replacement of SC284PULTRC?
All SC284PULTRC units undergo pre-shipment inspection (PSI). If there is an issue with SC284PULTRC, 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 SC284PULTRC part is unused and in its original packaging.
Return procedure for SC284PULTRC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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