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Semtech Corporation SC4524ESETRT
- Part No.:
- SC4524ESETRT
- Manufacturer:
- Semtech Corporation
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
SC4524ESETRT.pdf
- Description:
- IC REG BUCK ADJ 2A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,878
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Product details
Overview
SC4524ESETRT from Semtech is a Transient Diverting Suppressor (TDS) designed for high-energy EOS protection of single 22V I/O or power lines, featuring ±30kV IEC 61000-4-2 ESD immunity, 40A peak pulse current (8/20μs), 27.6V clamping at 40A, 20mΩ dynamic resistance, and 175pF junction capacitance - deployed in USB PD, USB Type-C, and industrial load switch input protection.
For engineers reviewing the SC4524ESETRT datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, DFN-6 package layout guidance, temperature-stable clamping behavior, and direct alternatives for 22V bus protection where conventional TVS diodes exhibit rising clamping voltage with current or temperature.
Technical Context
The SC4524ESETRT 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 standard 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 both 24A and 40A (1.2/50μs voltage + 8/20μs current combination waveform, RS = 2Ω), and maintains <600nA reverse leakage at 22V across temperature - enabling reliable protection in thermally demanding industrial and portable applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - defines maximum continuous DC operating voltage of protected line without leakage or degradation. |
| Clamping Voltage | 27.6V at 40A (8/20μs) - ensures downstream 24V-rated ICs (e.g., USB PD controllers) remain below damage threshold during worst-case surge. |
| 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 USB IF and IEC standards for connector-level ESD robustness. |
| Dynamic Resistance | 20mΩ - enables low-voltage-drop conduction during surge, minimizing energy dissipation in the device and thermal stress. |
| Junction Capacitance | 175pF at 22V, 1MHz - compatible with moderate-speed interfaces (e.g., USB 2.0, CC/SBU, load switch enable lines); not suitable for >5Gbps superspeed lanes. |
Pinout & Package
SC4524ESETRT is housed in a Pb-free, RoHS-compliant DFN-6 package measuring 1.6mm × 1.6mm × 0.55mm with UL 94V-0 molding compound. All six terminals are surface-mount; no thermal pad required - energy is dissipated within the silicon FET structure.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | GND | Common ground return for surge current; all three must be connected with low-inductance vias to maximize 40A capability. |
| Pins 4, 5, 6 | IN | Protected line input - tied together externally to interface with VBus, USB PD rail, or load switch input; single-point connection to connector minimizes coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage deviates ≤0.5V from 27.5V to 28V across 24–40A and –40°C to +125°C - eliminates derating uncertainty vs. TVS diodes. |
| FET-based shunt topology | Surge energy diverted through low-RDS(on) channel instead of PN-junction - avoids thermal runaway and enables higher IPP in small footprint. |
| Low dynamic resistance | 20mΩ measured between 1A–40A (8/20μs) - reduces voltage overshoot during fast-rising transients and improves system margin. |
| High EFT immunity | ±4kV per IEC 61000-4-4 (5/50ns, 100kHz/5kHz) - protects against repetitive burst noise in industrial control and motor drive environments. |
Applications
| USB Type-C Power Delivery Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting 20–22V VBus lines in USB-C receptacles supporting up to 100W PD negotiation. IC Role / Device Role / Timing Role: Primary EOS suppressor placed directly at connector, clamping surges before reaching PD controller and port power switches. Use Value: Maintains 27.6V clamping at full 40A surge - prevents latch-up or gate oxide damage in 24V-tolerant PD controllers (e.g., TUSB73x, CYPD317x) across temperature. |
Use Scenario: Safeguarding input rails of industrial-grade load switches (e.g., ON Semi NIS513x, TI TPS229xx) exposed to lightning-induced surges in remote meters or PLC I/O modules. IC Role / Device Role / Timing Role: Front-end transient shunt that limits voltage seen by the load switch's internal FET drain-source junction during 1.2/50μs surges. Use Value: Keeps clamping voltage below 30V - well under typical 30–40V VDS(max) ratings of integrated load switches, avoiding catastrophic failure. |
| IoT Edge Node Power Bus Protection | Notebook/Tablet Main Power Rail Protection |
Use Scenario: Securing 12–22V auxiliary power inputs in battery-powered IoT gateways subjected to ESD during field servicing or connector mating. IC Role / Device Role / Timing Role: Single-device solution replacing multi-stage TVS+MOV networks, reducing BOM count and PCB area in space-constrained edge nodes. Use Value: 1.6mm × 1.6mm footprint saves >60% board area vs. SOD-323 TVS; ±30kV ESD rating eliminates need for secondary ESD components. |
Use Scenario: Protecting 19.5V or 20V main adapter input rails in ultrabooks and 2-in-1 tablets where compactness and thermal reliability are critical. IC Role / Device Role / Timing Role: Standalone clamping device mounted near DC jack, handling both conducted surges (IEC 61000-4-5) and connector ESD (IEC 61000-4-2). Use Value: Stable clamping across –40°C to +125°C ambient enables consistent protection during battery charging cycles and processor thermal throttling events. |
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-6 package, identical marking code "T22"; manufactured by Semtech as direct variant of SC4524ESETRT. | No functional difference - used interchangeably in USB-C and industrial designs per Semtech's ordering documentation. | Select TDS2211P.C when sourcing from distributors listing Semtech's official part number; identical performance and qualification. |
| uClamp2411ZA.TCT | Zener-based TVS with 24V working voltage, 35V clamping at 12A, 0.25pF capacitance - lower surge rating (12A vs. 40A), higher clamping, but ultra-low capacitance. | Suitable only for low-capacitance signal lines (CC/SBU), not power rails; cannot replace SC4524ESETRT on 22V VBus due to insufficient IPP and higher VC. | Use uClamp2411ZA.TCT only for auxiliary signal lines adjacent to SC4524ESETRT-protected power rails - never as a drop-in substitute for power-line protection. |
Compared with TDS2211P.C (identical function and spec), SC4524ESETRT offers the same robust 40A/22V protection in DFN-6; versus uClamp2411ZA.TCT, it provides 3.3× higher surge current handling and 8V lower clamping - making it the sole viable option for 22V power rail EOS hardening.
Availability
SC4524ESETRT is available at Aetrix Electronics and suitable for USB Type-C PD systems, industrial load switch inputs, and IoT edge node power buses requiring stable component supply, long-term lifecycle support, and guaranteed RoHS/REACH compliance.
Supply support for SC4524ESETRT 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 signal integrity.
SC4524ESETRT belongs to Semtech's Transient Diverting Suppressor (TDS) product line - engineered specifically to replace conventional TVS diodes in high-reliability 12–24V power rail protection where stable clamping under surge and temperature is non-negotiable.
FAQ
What is the maximum continuous operating voltage for SC4524ESETRT?
The SC4524ESETRT has a reverse stand-off voltage (VRWM) of 22V, meaning it can reliably withstand up to 22V DC or RMS AC on the protected line without significant leakage or degradation. This makes SC4524ESETRT ideal for 20V USB PD and 22V industrial power rails where sustained voltage stability is required.
Does SC4524ESETRT require a thermal pad on the PCB?
No, SC4524ESETRT does not require a thermal pad. Its DFN-6 package dissipates surge energy internally via the FET channel, not through junction heating like traditional TVS diodes. Layout guidelines specify connecting all GND pins (1–3) with multiple low-inductance vias to the ground plane - not adding a thermal pad - to optimize surge current handling.
How does SC4524ESETRT 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), SC4524ESETRT maintains ~27.6V clamping from 24A to 40A due to its FET-based shunt architecture. This eliminates design uncertainty caused by temperature- and current-dependent VC drift - a key advantage confirmed in SC4524ESETRT's datasheet curves.
Can SC4524ESETRT be used on USB 3.2 Gen 2 (10Gbps) data lines?
No, SC4524ESETRT is not suitable for USB 3.2 Gen 2 data lines. With 175pF junction capacitance, it would severely degrade signal integrity above ~100MHz. SC4524ESETRT is intended exclusively for power-line or low-speed signal protection (e.g., CC, SBU, enable lines). For superspeed lanes, use sub-0.3pF devices like RClamp3371ZC alongside SC4524ESETRT.
What is the recommended PCB layout for optimal SC4524ESETRT performance?
Place SC4524ESETRT as close as possible to the protected connector. Tie pins 4–6 together with a short, wide trace to the incoming line; connect pins 1–3 to ground using ≥3 vias to an inner ground plane. Avoid stubs or routing beneath the device. This minimizes parasitic inductance - critical for maintaining 27.6V clamping during 1.2/50μs surges, as validated in SC4524ESETRT's application notes.
SC4524ESETRT 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:
- 2A
- 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
SC4524ESETRT FAQ
1.How can I place an order for SC4524ESETRT through Aetrix?
Please submit a Request for Quotation (RFQ) for SC4524ESETRT 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 SC4524ESETRT reliable?
The price and inventory of SC4524ESETRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC4524ESETRT is usually 5 days.
3.What payment methods are accepted for SC4524ESETRT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC4524ESETRT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC4524ESETRT?
SC4524ESETRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC4524ESETRT 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 SC4524ESETRT?
For technical support, including SC4524ESETRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC4524ESETRT requirements.
6.How does Aetrix verify that SC4524ESETRT is sourced from the original manufacturer or authorized distributors?
All SC4524ESETRT 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 SC4524ESETRT meets industry standards.
7.What is the process for return or replacement of SC4524ESETRT?
All SC4524ESETRT units undergo pre-shipment inspection (PSI). If there is an issue with SC4524ESETRT, 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 SC4524ESETRT part is unused and in its original packaging.
Return procedure for SC4524ESETRT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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