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Semtech Corporation SC189HULTRT
- Part No.:
- SC189HULTRT
- Manufacturer:
- Semtech Corporation
- Package:
- 6-UFDFN Exposed Pad
- Datasheet:
-
SC189HULTRT.pdf
- Description:
- IC REG BUCK 1.5V 1.5A 6MLPD
- Quantity:
- Payment:
- Shipping:
Inventory:1,147
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Product details
Overview
SC189HULTRT from Semtech is a transient diverting suppressor designed for high-energy EOS protection on 22V-rated power or I/O lines, featuring ±30kV IEC 61000-4-2 ESD immunity, 40A (8/20μs) peak pulse current handling, 27.5–28V clamping voltage at 40A, and DFN 1.6×1.6×0.55mm 6-lead package - deployed in USB Type-C PD input protection and industrial load switch front-end circuits.
For engineers reviewing the SC189HULTRT datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, validated thermal stability across −40°C to +125°C, confirmed 20mΩ dynamic resistance, exact pin-to-ground/input terminal mapping, and direct alternative options for 22V EOS protection designs.
Technical Context
The SC189HULTRT 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 threshold. Unlike conventional TVS diodes, its clamping voltage remains nearly constant across 1–40A (8/20μs) due to decreasing RDS(on) under surge conditions.
It operates with reverse stand-off voltage of 22V, breakdown voltage of 25–27.9V at 1mA, and exhibits stable 27.5–28V clamping up to 40A under 1.2/50μs–8/20μs combination waveforms (RS = 2Ω), with junction capacitance of 175pF at 22V and 1MHz - enabling robust protection without signal integrity compromise in high-speed bus interfaces.
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 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 for connector-facing protection. |
| Dynamic Resistance | 20mΩ - enables low-voltage overshoot and minimal power dissipation during high-current transients. |
| Junction Capacitance | 175pF at 22V, 1MHz - compatible with USB Type-C VBus and industrial 22V power rail monitoring without signal distortion. |
| Operating Temp | −40°C to +125°C - supports operation in extended-temperature industrial and automotive under-hood environments. |
Pinout & Package
SC189HULTRT is housed in a Pb-free, RoHS-compliant DFN 1.6mm × 1.6mm × 0.55mm 6-lead package with exposed thermal pad not required (energy dissipated in silicon). All pins must be connected: Pins 1–3 are dedicated ground terminals; Pins 4–6 are parallel-connected input terminals for EOS/ESD protection path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | Ground (GND) | Low-inductance return path for surge current; all three must be connected to PCB ground plane via multiple vias for full 40A rating. |
| Pins 4, 5, 6 | Input (IN) | Parallel-connected high-current input terminals tied directly to protected bus (e.g., USB PD VBus, load switch VIN); no internal series impedance. |
Key Features
| Feature | Design Value |
|---|---|
| Constant Clamping Voltage | 27.5–28V across 1–40A surge range - eliminates voltage runaway seen in TVS diodes, ensuring predictable protection margin for 24V-rated ICs. |
| Temperature-Stable Clamping | Clamping remains flat from −40°C to +125°C - removes derating uncertainty in industrial thermal environments. |
| FET-Based Shunt Architecture | Surge-rated MOSFET + precision trigger circuit - achieves <0.1Ω effective RDS(on) under surge, minimizing I²R losses and thermal stress. |
| Low Dynamic Resistance | 20mΩ - reduces clamping overshoot and enables compact board layout without added series impedance. |
| High-EFT Immunity | ±4kV per IEC 61000-4-4 (5/50ns, 100kHz/5kHz) - protects against repetitive fast transients in motor drives and PLC I/O modules. |
Applications
| USB Type-C Power Delivery Input Protection | Industrial Load Switch Front-End Protection |
|---|---|
Use Scenario: Protecting USB Type-C VBus lines operating up to 20V nominal (22V max) from lightning-induced surges and connector ESD. IC Role / Device Role / Timing Role: Primary EOS shunt protector placed between Type-C receptacle and USB PD controller or load switch input. Use Value: Maintains 27.5–28V clamping at 40A and −40°C to +125°C - prevents overvoltage damage to 24V-rated PD controllers without thermal derating. |
Use Scenario: Safeguarding the input of industrial-grade load switches (e.g., HS2950P) in remote meters, robotics, and factory automation equipment. IC Role / Device Role / Timing Role: Front-end transient suppressor absorbing IEC 61000-4-5 surges before they reach the load switch's internal FET gate oxide. Use Value: Limits clamping voltage below 30V - avoids gate-source overvoltage failure in 24V-rated load switches during ±1kV (1.2/50μs) surge events. |
| IoT Device Power Rail Protection | Storage Device 22V Backup Supply Protection |
Use Scenario: Securing 22V auxiliary power rails in battery-backed IoT edge nodes exposed to field ESD and induced surges. IC Role / Device Role / Timing Role: Single-device solution for EOS suppression on always-on 22V supply inputs feeding PMICs or microcontrollers. Use Value: Delivers ±30kV ESD immunity and 40A surge capability in 1.6×1.6mm footprint - preserves board space while meeting IEC 61000-4-2/4-5 compliance. |
Use Scenario: Protecting 22V backup power inputs in enterprise SSDs and NVMe storage modules against hot-plug transients and system-level surges. IC Role / Device Role / Timing Role: High-reliability clamping device placed at storage module power entry point, upstream of DC-DC converters. Use Value: Stable 27.5–28V clamping ensures converter enable thresholds and supervisor ICs remain within safe operating area during 8/20μs surges. |
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, identical pinout and marking (T22XX), manufactured by Semtech - direct second-source variant. | Same use cases: USB PD, load switch, industrial 22V rail protection - fully interchangeable in layout and BOM. | Select TDS2211P.C when dual-sourcing from Semtech's standard distribution channel is required; identical qualification and traceability. |
| SP1003-220K | 22V standoff, 30A (8/20μs) rating, 33V clamping at 30A, SOD-323 package - lower surge rating and higher clamping voltage than SC189HULTRT. | Suitable only for lower-energy applications (e.g., non-PD USB ports, 12V industrial sensors) where 40A/28V performance is not mandated. | Choose SP1003-220K only if board space allows larger SOD-323 footprint and design tolerates 33V clamping - not recommended for USB PD or 24V load switches. |
Compared with TDS2211P.C (identical performance, alternate ordering code) and SP1003-220K (lower surge rating, higher clamping), SC189HULTRT delivers best-in-class 40A/28V protection in the smallest DFN footprint - critical for space-constrained USB Type-C and industrial power modules requiring guaranteed 22V system survivability.
Availability
SC189HULTRT is available at Aetrix Electronics and suitable for USB Type-C PD interface protection, industrial load switch input safeguarding, and IoT 22V power rail hardening requiring stable component supply across production lifecycles.
Supply support for SC189HULTRT 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, sensing, and connectivity.
The SC189HULTRT belongs to Semtech's Transient Diverting Suppressor (TDS) family - engineered specifically to replace conventional TVS diodes in high-reliability 20–24V power and interface protection applications where stable clamping and temperature insensitivity are mandatory.
FAQ
What is the maximum continuous operating voltage for SC189HULTRT?
The SC189HULTRT 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 SC189HULTRT ideal for protecting 20V USB PD VBus and 22V industrial power rails where sustained voltage exposure occurs.
Does SC189HULTRT require a thermal pad on the PCB?
No, SC189HULTRT does not require an exposed thermal pad. Its FET-based architecture dissipates surge energy in the silicon die rather than at a junction interface, eliminating the need for thermal vias or copper pour under the package - unlike many TVS diodes. The DFN 1.6×1.6mm body is sufficient for its rated 40A surge duty.
How does SC189HULTRT differ from standard TVS diodes in clamping behavior?
SC189HULTRT maintains a near-constant 27.5–28V clamping voltage from 1A to 40A (8/20μs), whereas standard TVS diodes exhibit linear clamping rise (VC = VBR + IPP × RDYN). This stability is achieved via a triggered shunt FET with decreasing RDS(on), making SC189HULTRT far more predictable for 24V system protection.
Can SC189HULTRT be used for protecting USB SuperSpeed data lines?
No - SC189HULTRT is intended for power or single-ended I/O line protection (e.g., VBus, CC, SBU), not high-speed differential data lanes. Its 175pF junction capacitance would severely degrade signal integrity on USB 3.x or DisplayPort lines. For those, low-capacitance devices like RClamp3371ZC (<0.25pF) are recommended alongside SC189HULTRT in full USB Type-C solutions.
What is the pin configuration and connection requirement for SC189HULTRT?
SC189HULTRT uses a 6-pin DFN with Pins 1–3 as GND and Pins 4–6 as IN. All three GND pins must connect to the PCB ground plane via multiple vias; all three IN pins must tie together to the protected line. Omitting any pin reduces surge current handling and compromises 40A rating - confirmed in Semtech's layout guidelines and functional diagram.
SC189HULTRT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Series:
- -
- Package/Case:
- 6-UFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.9V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 1.5A
- Frequency - Switching:
- 2.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-MLPD-UT (2x2)
SC189HULTRT FAQ
1.How can I place an order for SC189HULTRT through Aetrix?
Please submit a Request for Quotation (RFQ) for SC189HULTRT 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 SC189HULTRT reliable?
The price and inventory of SC189HULTRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC189HULTRT is usually 5 days.
3.What payment methods are accepted for SC189HULTRT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC189HULTRT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC189HULTRT?
SC189HULTRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC189HULTRT 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 SC189HULTRT?
For technical support, including SC189HULTRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC189HULTRT requirements.
6.How does Aetrix verify that SC189HULTRT is sourced from the original manufacturer or authorized distributors?
All SC189HULTRT 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 SC189HULTRT meets industry standards.
7.What is the process for return or replacement of SC189HULTRT?
All SC189HULTRT units undergo pre-shipment inspection (PSI). If there is an issue with SC189HULTRT, 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 SC189HULTRT part is unused and in its original packaging.
Return procedure for SC189HULTRT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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