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Semtech Corporation SC632AULTRT
- Part No.:
- SC632AULTRT
- Manufacturer:
- Semtech Corporation
- Package:
- 8-UFDFN Exposed Pad
- Datasheet:
-
SC632AULTRT.pdf
- Description:
- IC REG CHARG PUMP 5V 275MA 8MLPD
- Quantity:
- Payment:
- Shipping:
Inventory:12,301
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Product details
Overview
SC632AULTRT 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, 20mΩ dynamic resistance, and 175pF junction capacitance in a DFN 1.6×1.6×0.55mm package - deployed in USB Type-C PD input protection.
For engineers reviewing the SC632AULTRT datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage stability across temperature and current, low dynamic resistance for flat voltage response, DFN-6 layout compatibility, and compliance with IEC 61000-4-2/4-4/4-5 for industrial and portable electronics surge resilience.
Technical Context
The SC632AULTRT uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit when transient voltage exceeds breakdown threshold. Unlike conventional TVS diodes, its clamping voltage remains nearly constant (27.5–28V) from 24A to 40A due to decreasing RDS(on) under surge conditions.
It operates over −40°C to +125°C with stable clamping performance and minimal temperature drift - verified across −50°C to +150°C junction range. The device protects one unidirectional line with reverse stand-off voltage of 22V, breakdown at 25–27.9V, and leakage <600nA at VRWM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - matches nominal USB PD bus voltage and avoids false triggering during normal operation. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs) - stays below 30V damage threshold of common 24V-rated load switches and PD controllers. |
| Peak Pulse Current | 40A (8/20μs) - satisfies IEC 61000-4-5 Level 4 (±1kV, RS=42Ω) for industrial equipment inputs. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds smartphone/tablet interface ESD requirements without derating. |
| Dynamic Resistance | 20mΩ - enables flat clamping curve and minimizes voltage overshoot during fast-rising transients. |
| Junction Capacitance | 175pF at 22V/1MHz - compatible with DC-biased power rails; not intended for high-speed data lines. |
Pinout & Package
SC632AULTRT is housed in a Pb-free, RoHS-compliant DFN 1.6mm × 1.6mm × 0.55mm 6-lead package with UL 94V-0 molding compound. All six terminals are surface-mount; thermal dissipation occurs through copper traces and vias - no exposed thermal pad required.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | GND | Common ground return path for surge current; all three must be connected to maximize current handling and minimize inductance. |
| Pins 4, 5, 6 | IN | Protected line input - tied together to a single trace from connector; enables parallel conduction for 40A rating. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.5V across full 24–40A surge range - eliminates need for over-spec'ed IPP margining. |
| Temperature-stable protection | Clamping remains 27.5–28V from −40°C to +125°C - removes thermal derating calculations for industrial deployments. |
| Low dynamic resistance | 20mΩ ensures minimal IR drop during surge - critical for protecting low-voltage-tolerance FET gates in load switches. |
| High-energy EOS capability | 1120W peak pulse power (8/20μs) supports repeated surge events without degradation in USB PD or IoT power rails. |
Applications
| USB Type-C Power Delivery Input Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting VBus lines in USB-C receptacles supporting up to 20V/5A PD negotiation. IC Role / Device Role / Timing Role: Primary EOS shunt protector placed between connector and PD controller or buck converter input. Use Value: Maintains 27.5–28V clamping across temperature and current - prevents overvoltage damage to 24V-rated PD controllers even at 125°C ambient. |
Use Scenario: Safeguarding enable and input pins of high-side load switches (e.g., HS2950P) in remote meters and robotics. IC Role / Device Role / Timing Role: Front-end transient suppressor absorbing lightning-induced surges before they reach switch FET gate oxide. Use Value: 20mΩ dynamic resistance limits voltage overshoot to <0.8V above clamping level - keeps gate-source stress below 10V during 40A transients. |
| IoT Device DC Power Rail Protection | Notebook/Tablet 22V System Bus Protection |
Use Scenario: Securing 12–24V DC input rails in battery-powered edge sensors and gateways exposed to ESD during field servicing. IC Role / Device Role / Timing Role: Single-component solution replacing multi-stage TVS+MOV networks on compact PCBs. Use Value: 1.6×1.6mm footprint saves >60% board area vs. discrete TVS+capacitor solutions while delivering higher surge rating. |
Use Scenario: Protecting auxiliary 22V system rails (e.g., display backlight, SSD power) in thin-client notebooks and detachable tablets. IC Role / Device Role / Timing Role: Standalone clamping device on non-data power paths where low capacitance is not required. Use Value: 175pF capacitance has negligible impact on 100kHz–1MHz rail stability - avoids resonance or regulation loop interference. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDS2211P | Same die, identical electrical specs and package - confirmed direct replacement per Semtech documentation. | No functional difference; used interchangeably in USB-C and load switch designs. | Select SC632AULTRT for Aetrix-sourced traceability and volume pricing; TDS2211P for legacy design continuity. |
| uClamp2411ZA | 24V working voltage, lower 20A IPP rating, 12pF capacitance - optimized for CC/SBU lines, not power rails. | Intended for low-capacitance signal-line protection; unsuitable for 40A power rail clamping. | Use only for auxiliary signal lines; SC632AULTRT remains mandatory for main VBus protection where energy handling is critical. |
Compared with TDS2211P, SC632AULTRT offers identical protection performance and drop-in compatibility; versus uClamp2411ZA, it provides 2× peak current capacity and 15× higher clamping energy tolerance - making it the sole suitable choice for 22V power rail EOS suppression.
Availability
SC632AULTRT is available at Aetrix Electronics and suitable for USB Type-C PD interfaces, industrial load switch inputs, IoT DC power rails, and notebook 22V system buses requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for SC632AULTRT 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 protection, sensing, and connectivity.
SC632AULTRT belongs to Semtech's Transient Diverting Suppressor (TDS) product line - engineered specifically to replace conventional TVS diodes in high-energy, temperature-critical power rail protection applications.
FAQ
What is the maximum operating temperature range for SC632AULTRT?
The SC632AULTRT is rated for continuous operation from −40°C to +125°C ambient temperature. Its clamping voltage remains stable across this full range - measured at 27.5–28V from −50°C to +150°C junction temperature - enabling reliable use in automotive under-hood, industrial control, and outdoor IoT environments without thermal derating.
Does SC632AULTRT require a thermal pad or heatsink on the PCB?
No, SC632AULTRT does not require a thermal pad or external heatsink. Its DFN package dissipates surge energy through the copper traces connected to pins 1–3 (GND) and pins 4–6 (IN). Layout guidelines recommend multiple vias from GND pins to internal ground planes to reduce parasitic inductance - but no thermal pad is specified or needed per Semtech's validated land pattern and reliability testing.
Can SC632AULTRT be used on high-speed data lines like USB SuperSpeed or PCIe?
No, SC632AULTRT is not suitable for high-speed data lines. Its 175pF junction capacitance would severely degrade signal integrity on differential pairs operating above ~100MHz. It is expressly designed for DC-biased power rails and low-frequency I/O lines - for USB SS, DP/DM, or CC lines, Semtech recommends low-capacitance devices like RClamp3371ZC (<0.25pF) instead of SC632AULTRT.
How does SC632AULTRT differ from standard TVS diodes in clamping behavior?
Unlike standard TVS diodes whose clamping voltage rises linearly with peak current (VC = VBR + IPP × RDYN), SC632AULTRT uses a triggered FET architecture that maintains near-constant clamping (27.5–28V) from 24A to 40A. This results from decreasing RDS(on) under surge - eliminating the need to overspecify IPP to meet voltage thresholds, especially at elevated temperatures where TVS performance degrades.
Is SC632AULTRT pin-compatible with other Semtech TDS devices like TDS2411P?
No, SC632AULTRT is not pin-compatible with TDS2411P. While both are 6-pin DFN packages, TDS2411P has different pin assignments (e.g., separate IN and OUT pins) and is rated for 24V working voltage with distinct trigger characteristics. SC632AULTRT's pins 1–3 are GND-only and pins 4–6 are IN-only - a symmetrical shunt configuration unique to the 22V TDS family. Substitution requires PCB layout revision.
SC632AULTRT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Series:
- -
- Package/Case:
- 8-UFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Charge Pump
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.95V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 275mA
- Frequency - Switching:
- 1MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MLPD-UT (2x2)
SC632AULTRT FAQ
1.How can I place an order for SC632AULTRT through Aetrix?
Please submit a Request for Quotation (RFQ) for SC632AULTRT 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 SC632AULTRT reliable?
The price and inventory of SC632AULTRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC632AULTRT is usually 5 days.
3.What payment methods are accepted for SC632AULTRT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC632AULTRT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC632AULTRT?
SC632AULTRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC632AULTRT 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 SC632AULTRT?
For technical support, including SC632AULTRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC632AULTRT requirements.
6.How does Aetrix verify that SC632AULTRT is sourced from the original manufacturer or authorized distributors?
All SC632AULTRT 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 SC632AULTRT meets industry standards.
7.What is the process for return or replacement of SC632AULTRT?
All SC632AULTRT units undergo pre-shipment inspection (PSI). If there is an issue with SC632AULTRT, 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 SC632AULTRT part is unused and in its original packaging.
Return procedure for SC632AULTRT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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