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Semtech Corporation SC4910BITSTRT
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- Part No.:
- SC4910BITSTRT
- Manufacturer:
- Semtech Corporation
- Category:
- Power Supply Controllers, Monitors
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SC4910BITSTRT.pdf
- Description:
- IC CTRLR BUCK PWM 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,074
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Product details
Overview
SC4910BITSTRT 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, and 20mΩ dynamic resistance - deployed in USB Type-C PD input protection and industrial load switch front-end circuits.
For engineers reviewing the SC4910BITSTRT datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, DFN-6 package layout guidance, temperature-stable clamping behavior, and direct alternative options for 22V bus protection in high-reliability embedded and power delivery systems.
Technical Context
The SC4910BITSTRT 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 across 24–40A (8/20μs) due to decreasing RDS(on) under surge conditions.
It operates over –40°C to +125°C with stable 27.5–28V clamping at 40A, <600nA reverse leakage at 22V, and 175pF junction capacitance at 22V/1MHz - enabling robust protection without thermal derating penalties typical of junction-based TVS devices.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - defines maximum continuous DC or RMS operating voltage on protected line without leakage or degradation. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs) - ensures downstream 24V-rated ICs (e.g., USB PD controllers, load switches) remain below damage threshold during surge events. |
| 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 immunity standards without external staging. |
| Dynamic Resistance | 20mΩ - enables low-voltage overshoot and minimal power dissipation during high-current transients. |
| Junction Capacitance | 175pF at 22V/1MHz - compatible with DC power rails and low-speed I/O; not suitable for >100MHz signal lines. |
| Operating Temp. | –40°C to +125°C - supports operation in industrial enclosures, automotive under-hood proximity, and wide-temperature IoT deployments. |
Pinout & Package
SC4910BITSTRT is housed in a Pb-free, RoHS-compliant DFN-6 package measuring 1.6mm × 1.6mm × 0.55mm with exposed thermal pad (no internal thermal pad required; energy dissipated in silicon). All six terminals must be connected per functional role to achieve rated 40A surge capability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground return for surge current; all three pins must be tied to low-inductance ground plane via multiple vias. |
| 4, 5, 6 | IN | Protected line input (e.g., VBUS, load switch input); all three pins are internally paralleled and must be shorted externally to connector. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.5V across full 24–40A surge range - eliminates need for over-spec'ing IPP to meet voltage margin. |
| Temperature-stable protection | Clamping remains 27.5–28V from –40°C to +125°C - removes thermal derating calculations required for standard TVS diodes. |
| Low dynamic resistance | 20mΩ enables <1.1W instantaneous power dissipation at 40A - reduces localized heating and improves reliability vs. 1–2Ω TVS devices. |
| High-energy surge rating | 1120W peak pulse power (8/20μs) - supports repeated lightning-surge exposure in industrial gateways and metering equipment. |
| DFN-6 space efficiency | 1.6mm × 1.6mm footprint saves >60% board area vs. SO-8 or SOT-23 TVS solutions rated for equivalent 40A performance. |
Applications
| USB Type-C Power Delivery Protection | Industrial Load Switch Input Protection |
|---|---|
|
Use Scenario: Protecting 20V–22V VBUS lines in USB-C receptacles against ESD, lightning-induced surges, and hot-plug transients. IC Role / Device Role / Timing Role: Primary front-end EOS suppressor placed between connector and USB PD controller or buck converter input. Use Value: Maintains 27.5–28V clamping at 40A and 125°C - prevents latch-up or gate oxide damage in 24V-tolerant PD controllers where standard TVS would exceed 35V. |
Use Scenario: Safeguarding enable/input pins of high-side load switches (e.g., HS2950P) in remote sensors, robotics, and smart meters. IC Role / Device Role / Timing Role: Shunt protector limiting transient overvoltage before it reaches the switch's internal FET gate or drain. Use Value: Prevents permanent failure of load switch due to VDS overstress by clamping within 28V - well below typical 30V absolute max ratings. |
| IoT Edge Device Power Rail Protection | Storage Device DC Input Protection |
|
Use Scenario: Securing 12–22V DC inputs of battery-backed edge gateways exposed to field ESD and induced surges. IC Role / Device Role / Timing Role: Single-device solution replacing multi-stage TVS+MOV networks for compact, high-reliability designs. Use Value: Delivers 40A surge handling and ±30kV ESD in 2.56mm² area - enables conformal coating-compatible layouts without thermal pads or large footprints. |
Use Scenario: Protecting SATA or NVMe SSD power inputs (3.3V/5V/12V rails) against EOS during hot-swap or system-level surge events. IC Role / Device Role / Timing Role: Standalone rail clamp for auxiliary 12V or 19V supplies feeding storage controller power stages. Use Value: 175pF capacitance avoids signal integrity issues on power rails while providing 22V working voltage margin above nominal 19V inputs. |
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 die, same DFN-6 package, identical electrical specs - only differs in tape-and-reel packaging (3,000 pcs/reel vs. SC4910BITSTRT's unspecified quantity). | No functional difference; used interchangeably in production where reel size or traceability requirements align. | Select TDS2211P.C if standard Semtech reel logistics are preferred; SC4910BITSTRT may reflect custom labeling or distribution channel variant. |
| uClamp2411ZA | 24V working voltage, lower 20A IPP rating, ±30kV ESD, but uses standard TVS architecture - clamping rises with current/temperature (32V @ 20A, 125°C). | Suitable for CC/SBU lines in USB-C, not VBUS; lacks constant-clamp stability needed for 22V power rail protection. | Choose uClamp2411ZA only for secondary signal-line protection; not a functional replacement for SC4910BITSTRT in primary power rail roles. |
Compared with TDS2211P.C, SC4910BITSTRT offers identical protection performance and package; compared with uClamp2411ZA, SC4910BITSTRT provides superior 40A surge handling, temperature-invariant clamping, and higher energy absorption - making it the sole viable option for 22V bus-level EOS defense.
Availability
SC4910BITSTRT is available at Aetrix Electronics and suitable for USB Type-C PD interfaces, industrial load switch inputs, and IoT edge device power rails requiring stable component supply, long-term lifecycle support, and guaranteed surge performance across extended temperature ranges.
Supply support for SC4910BITSTRT 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 connectivity.
The SC4910BITSTRT belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered specifically to replace conventional TVS diodes in high-reliability 22V power rail protection where stable clamping and temperature resilience are critical.
FAQ
What is the exact package type and dimensions of SC4910BITSTRT?
SC4910BITSTRT uses a DFN-6 package with 1.6mm × 1.6mm × 0.55mm body dimensions and no exposed thermal pad. Pin 1 is marked with a laser dot; pins 1–3 are GND, pins 4–6 are IN. The land pattern requires full connection of all six terminals to achieve rated 40A surge performance.
Does SC4910BITSTRT meet IEC 61000-4-5 surge immunity standards?
Yes, SC4910BITSTRT is rated for 40A peak pulse current with 8/20μs waveform per IEC 61000-4-5, supporting ±1kV unsymmetrical line testing (RS = 42Ω, CS = 0.5μF). Its 27.5–28V clamping at 40A ensures compliance with industrial Level 4 surge requirements for 22V systems.
How does SC4910BITSTRT differ from standard TVS diodes in clamping behavior?
Unlike standard TVS diodes whose clamping voltage rises linearly with peak current (VC = VBR + IPP × RDYN), SC4910BITSTRT maintains 27.5–28V clamping from 24A to 40A due to its FET-based shunt architecture and decreasing RDS(on). This eliminates thermal derating and simplifies margin analysis.
Can SC4910BITSTRT be used on high-speed data lines like USB SuperSpeed?
No, SC4910BITSTRT is not suitable for high-speed data lines. Its 175pF junction capacitance would severely degrade signal integrity on >100MHz differential pairs. It is intended exclusively for DC power rails or low-speed I/O lines - use RClamp3371ZC (<0.25pF) for USB SS, DP/DM, or CC lines.
What is the maximum operating temperature range for SC4910BITSTRT?
SC4910BITSTRT is specified for continuous operation from –40°C to +125°C. Its clamping voltage remains stable across this full range - measured at 27.5–28V at 40A even at +125°C - unlike conventional TVS diodes whose clamping degrades significantly above 85°C.
SC4910BITSTRT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Applications:
- Secondary-Side Controller, Synchronous Rectifier
- Voltage - Input:
- -
- Voltage - Supply:
- 4.5V ~ 18V
- Current - Supply:
- 10 mA
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
SC4910BITSTRT FAQ
1.How can I place an order for SC4910BITSTRT through Aetrix?
Please submit a Request for Quotation (RFQ) for SC4910BITSTRT 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 SC4910BITSTRT reliable?
The price and inventory of SC4910BITSTRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC4910BITSTRT is usually 5 days.
3.What payment methods are accepted for SC4910BITSTRT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC4910BITSTRT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC4910BITSTRT?
SC4910BITSTRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC4910BITSTRT 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 SC4910BITSTRT?
For technical support, including SC4910BITSTRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC4910BITSTRT requirements.
6.How does Aetrix verify that SC4910BITSTRT is sourced from the original manufacturer or authorized distributors?
All SC4910BITSTRT 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 SC4910BITSTRT meets industry standards.
7.What is the process for return or replacement of SC4910BITSTRT?
All SC4910BITSTRT units undergo pre-shipment inspection (PSI). If there is an issue with SC4910BITSTRT, 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 SC4910BITSTRT part is unused and in its original packaging.
Return procedure for SC4910BITSTRT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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