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Semtech Corporation SC4525ESETRT
- Part No.:
- SC4525ESETRT
- Manufacturer:
- Semtech Corporation
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
SC4525ESETRT.pdf
- Description:
- IC REG BUCK ADJ 3A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,536
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Product details
Overview
SC4525ESETRT 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 - enabling robust USB Type-C PD bus protection in industrial and portable systems.
For engineers reviewing the SC4525ESETRT datasheet, pinout, applications, or equivalent options, this device offers critical advantages over conventional TVS diodes: near-constant clamping voltage independent of surge amplitude or ambient temperature, ultra-low dynamic resistance (20 mΩ), and DFN-6 package compatibility with space-constrained USB PD and load switch input designs.
Technical Context
The SC4525ESETRT uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit when transient voltage exceeds breakdown threshold. Unlike standard TVS diodes, its clamping voltage remains nearly flat (27.5–28V) from 24A to 40A IPP due to decreasing RDS(on) under surge conditions.
It operates across –40°C to +125°C with <600 nA reverse leakage at 22V, 175 pF junction capacitance at 22V/1MHz, and 1120W peak pulse power handling. Its functional architecture separates trigger sensing from shunt conduction, enabling superior thermal stability and consistent protection margin versus junction-based TVS devices.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22 V - matches nominal USB PD bus voltage and protects components rated up to 22V DC. |
| Clamping Voltage | 27.5–28 V at 40A (8/20μs) - stays within safe margin below typical 30V+ damage thresholds of USB PD controllers and load switches. |
| Peak Pulse Current | 40 A (8/20μs) - meets IEC 61000-4-5 Level 4 surge immunity requirements for industrial equipment and USB PD ports. |
| ESD Withstand | ±30 kV contact & air (IEC 61000-4-2) - exceeds automotive and industrial ESD test levels without degradation. |
| Dynamic Resistance | 20 mΩ - enables low-voltage-drop shunting that minimizes voltage overshoot during fast transients. |
| Junction Capacitance | 175 pF at 22V/1MHz - compatible with DC power rails and low-speed signal lines; not suitable for >100 Mbps data paths. |
Pinout & Package
SC4525ESETRT is housed in a RoHS-compliant, halogen-free DFN-6 package measuring 1.6 mm × 1.6 mm × 0.55 mm with exposed thermal pad (no internal thermal pad required). All six terminals are electrically active: three dedicated ground pins and three parallel input pins for low-inductance surge path routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground return for surge current; all three must be connected to minimize inductance and maximize 40A capability. |
| 4, 5, 6 | IN | Parallel-connected input terminals tied to protected line (e.g., VBUS); equal current sharing ensures uniform stress distribution. |
Key Features
| Feature | Design Value |
|---|---|
| FET-based transient shunting | Replaces PN-junction TVS with active MOSFET clamp, eliminating linear VC = VBR + IPP×RDYN dependency. |
| Temperature-stable clamping | Clamping voltage varies <0.5 V from –40°C to +125°C - eliminates derating for high-temp industrial deployments. |
| Low dynamic resistance | 20 mΩ enables sub-1V overshoot headroom at 40A, preserving margin for downstream 24–30V-rated ICs. |
| High-energy surge rating | 1120 W peak pulse power supports repeated 40A surges without parametric shift or failure. |
Applications
| USB Type-C Power Delivery Bus Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting 20–22V VBUS lines in USB-C PD ports against lightning-induced surges and connector hot-plug ESD. IC Role / Device Role / Timing Role: Primary EOS shunt protector placed directly at connector, clamping transients before they reach PD controller or buck converter. Use Value: Maintains 27.5–28V clamping across full 40A surge and –40°C to +125°C - avoids overvoltage damage to 30V-rated PD controllers even at elevated ambient temperatures. |
Use Scenario: Safeguarding enable and input pins of high-side load switches (e.g., HS2950P) in remote meters, robotics, and IoT edge nodes. IC Role / Device Role / Timing Role: Front-end transient suppressor on VIN rail, limiting voltage seen by internal FET gate oxide and overvoltage protection circuitry. Use Value: Prevents latch-up or permanent gate oxide rupture in load switches by holding clamping voltage well below 30V absolute maximum ratings. |
| IoT Device Power Rail Protection | Notebook/Tablet DC Power Input Protection |
Use Scenario: Securing 12–24V DC input rails in battery-powered IoT gateways exposed to ESD during field servicing or surge coupling from nearby AC lines. IC Role / Device Role / Timing Role: Standalone EOS suppressor on main system input, operating independently of PMIC or battery charger ICs. Use Value: Delivers 40A surge handling in 1.6×1.6mm footprint - reduces board area by >50% versus SOD-323 TVS solutions while improving reliability. |
Use Scenario: Protecting 19–20V adapter input circuits in ultrabooks and tablets against accidental AC line transients and ESD from user-accessible barrel jacks or USB-C ports. IC Role / Device Role / Timing Role: First-line defense on main DC input, coordinated with secondary low-capacitance TVS on data lines. Use Value: Stable clamping ensures consistent protection margin across operating temperature range - critical for fanless thermal designs where junction temp may exceed 100°C. |
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. | Same use cases: USB-C PD, load switch input, industrial 22V rails. | Select TDS2211P when sourcing from authorized Semtech distributors with full traceability and no re-marking concerns. |
| uClamp2411ZA | 24V working voltage, lower 24A IPP rating, higher 33V clamping, and 0.25pF capacitance - optimized for CC/SBU lines, not power rails. | Designed for low-capacitance data line protection; unsuitable for 22V VBUS due to higher clamping and lower surge rating. | Choose uClamp2411ZA only for auxiliary signal lines; avoid for power rail protection where SC4525ESETRT's 40A/28V performance is required. |
Compared with TDS2211P, SC4525ESETRT offers identical protection performance and form factor but may differ in date code marking and tape-and-reel logistics; compared with uClamp2411ZA, SC4525ESETRT provides 67% higher surge current capacity and 5V lower clamping - making it the sole viable option for 22V power rail EOS hardening.
Availability
SC4525ESETRT is available at Aetrix Electronics and suitable for USB Type-C PD implementations, industrial load switch inputs, and IoT device power rail protection requiring stable component supply, long-term lifecycle support, and guaranteed RoHS/halogen-free compliance.
Supply support for SC4525ESETRT 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 analog and mixed-signal ICs for precision sensing, protection, and connectivity.
The SC4525ESETRT belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered to replace conventional TVS diodes in high-reliability 22V power rail protection applications where stable clamping and temperature independence are critical.
FAQ
What is the maximum continuous operating voltage for SC4525ESETRT?
The SC4525ESETRT has a reverse stand-off voltage (VRWM) of 22 V, meaning it can continuously block up to 22 V DC without significant leakage. This makes SC4525ESETRT ideal for protecting 20–22V USB PD buses and industrial 24V nominal systems operating within derated limits. Exceeding 22 V risks premature conduction and accelerated wear.
Does SC4525ESETRT require a thermal pad on the PCB?
No, SC4525ESETRT does not require an external thermal pad. Its DFN-6 package dissipates surge energy primarily through the copper planes connected to pins 1–3 (GND) and 4–6 (IN), and the datasheet explicitly states "no thermal pad is needed." Proper layout - including multiple vias to inner ground layers and short, wide traces - ensures reliable 40A surge handling without thermal derating.
How does SC4525ESETRT 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), SC4525ESETRT maintains a nearly constant 27.5–28V clamping voltage from 24A to 40A due to its FET-based architecture and decreasing RDS(on). This eliminates uncertainty in worst-case overvoltage during high-current surges - a key advantage for protecting sensitive 30V-rated PD controllers.
Can SC4525ESETRT be used on high-speed data lines like USB SuperSpeed?
No, SC4525ESETRT is not suitable for USB SuperSpeed (5 Gbps) or other high-speed differential data lines. Its 175 pF junction capacitance would severely degrade signal integrity. SC4525ESETRT is intended exclusively for DC power rails and low-speed control lines (e.g., load switch enable, CC lines with supplemental low-C TVS). For SuperSpeed lanes, use sub-0.3 pF devices like RClamp3371ZC.
What is the recommended PCB layout for optimal surge performance of SC4525ESETRT?
Place SC4525ESETRT as close as possible to the protected connector. Connect all three IN pins (4,5,6) via a single low-inductance trace to the protected line, and tie all three GND pins (1,2,3) directly to a solid ground plane using ≥3 vias each. Avoid stubs or splits in the GND path - this layout minimizes parasitic inductance and ensures full 40A surge current sharing across all terminals, as validated in Semtech's application notes.
SC4525ESETRT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 28V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- 26.88V
- Current - Output:
- 3A
- Frequency - Switching:
- 200kHz ~ 2MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC, EDP
SC4525ESETRT FAQ
1.How can I place an order for SC4525ESETRT through Aetrix?
Please submit a Request for Quotation (RFQ) for SC4525ESETRT 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 SC4525ESETRT reliable?
The price and inventory of SC4525ESETRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC4525ESETRT is usually 5 days.
3.What payment methods are accepted for SC4525ESETRT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC4525ESETRT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC4525ESETRT?
SC4525ESETRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC4525ESETRT 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 SC4525ESETRT?
For technical support, including SC4525ESETRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC4525ESETRT requirements.
6.How does Aetrix verify that SC4525ESETRT is sourced from the original manufacturer or authorized distributors?
All SC4525ESETRT 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 SC4525ESETRT meets industry standards.
7.What is the process for return or replacement of SC4525ESETRT?
All SC4525ESETRT units undergo pre-shipment inspection (PSI). If there is an issue with SC4525ESETRT, 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 SC4525ESETRT part is unused and in its original packaging.
Return procedure for SC4525ESETRT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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