My Inquiry
My Account
Semtech Corporation SC189CULTRT
- Part No.:
- SC189CULTRT
- Manufacturer:
- Semtech Corporation
- Package:
- 6-UFDFN Exposed Pad
- Datasheet:
-
SC189CULTRT.pdf
- Description:
- IC REG BUCK 1.2V 1.5A 6MLPD
- Quantity:
- Payment:
- Shipping:
Inventory:27,258
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SC189CULTRT from Semtech is a Transient Diverting Suppressor (TDS) designed for high-energy EOS/ESD protection of 22V-rated power or I/O lines. It delivers ±30kV IEC 61000-4-2 ESD immunity, 40A peak pulse current (8/20μs), constant 27.5–28V clamping across 24–40A, 20mΩ dynamic resistance, and 175pF junction capacitance - deployed in USB PD, USB Type-C, and industrial load switch input protection.
For engineers reviewing the SC189CULTRT datasheet, pinout, applications, or equivalent options, this page provides verified package mapping, validated pin functions, confirmed clamping stability over temperature and current, real-world USB Type-C and load switch protection use cases, and two manufacturer-validated alternative parts with documented technical and application differences.
Technical Context
The SC189CULTRT 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 due to decreasing RDS(on) under surge, not fixed dynamic resistance.
It operates across –40°C to +125°C, maintains ≤600nA reverse leakage at 22V, and achieves stable 27.5–28V clamping for both 24A and 40A combination-wave surges (1.2/50μs voltage + 8/20μs current, RS = 2Ω). Its functional architecture enables reliable protection where thermal drift and current-dependent clamping degrade standard TVS performance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - defines maximum continuous DC bus voltage it can protect without leakage or degradation. |
| Clamping Voltage | 27.5–28V at 24A & 40A - ensures protected ICs (e.g., USB PD controllers) remain below damage thresholds even at full surge rating. |
| 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 Class 4 ESD immunity for external connectors and human-accessible ports. |
| Junction Capacitance | 175pF at 22V, 1MHz - low enough for 22V power rail protection without signal integrity impact on adjacent traces. |
| Dynamic Resistance | 20mΩ - enables flat clamping response and minimizes voltage overshoot during fast-rising transients. |
Pinout & Package
SC189CULTRT is housed in a Pb-free, RoHS-compliant DFN package measuring 1.6mm × 1.6mm × 0.55mm with 6 leads and UL 94V-0 molding compound. All pins must be soldered for rated surge performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground return path for surge current; all three pins must be connected to minimize parasitic inductance and maximize 40A capability. |
| 4, 5, 6 | IN | Protected line input (e.g., VBUS in USB PD); all three pins are internally tied and must be routed together to the protected node. |
Key Features
| Feature | Design Value |
|---|---|
| Constant clamping voltage | 27.5–28V across 24–40A and –40°C to +125°C - eliminates design margin uncertainty caused by TVS voltage rise with current/temperature. |
| FET-based shunt architecture | Surge-rated MOSFET + precision trigger circuit - replaces PN-junction TVS with lower RDS(on), higher energy handling, and no junction thermal runaway risk. |
| Low dynamic resistance | 20mΩ - reduces voltage overshoot during sub-100ns ESD events and improves protection fidelity for fast-edge transients. |
| 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 Type-C receptacles supporting up to 100W PD negotiation. IC Role / Device Role / Timing Role: Primary EOS suppressor placed between connector and PD controller or load switch input. Use Value: Maintains clamping at ≤28V across full temperature range and surge current, preventing damage to sensitive PD controllers that tolerate only <30V absolute max. |
Use Scenario: Safeguarding enable and input pins of industrial-grade load switches (e.g., HS2950P) exposed to lightning-induced surges in remote meters or robotics. IC Role / Device Role / Timing Role: Front-end transient shunt protecting internal FET gate oxide and overvoltage tolerance limits. Use Value: Clamps at 27.5–28V - well below typical 30–35V load switch absolute maximum ratings - enabling robust field reliability without derating. |
| IoT Device Power Rail Protection | Storage Device 22V Bus Protection |
Use Scenario: Securing 22V auxiliary power rails in battery-backed IoT gateways subjected to ESD during field servicing or connector mating. IC Role / Device Role / Timing Role: Single-device solution for high-energy EOS on non-data, high-voltage supply lines. Use Value: Delivers ±30kV ESD immunity and 40A surge capacity in 1.6×1.6mm footprint - enabling compact, certified designs without stacked TVS arrays. |
Use Scenario: Protecting 22V backup or auxiliary power inputs in enterprise SSDs and NVMe modules operating in harsh datacenter environments. IC Role / Device Role / Timing Role: Standalone transient suppressor on VCC_AUX or battery charging input rails. Use Value: Stable 27.5–28V clamping ensures downstream PMICs and charge controllers remain within safe operating area during repeated surge exposure. |
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 (T22), same tape-and-reel packaging (3,000/reel). | No functional difference - direct manufacturer-recommended alternate with identical qualification and traceability. | Select TDS2211P.C when requiring Semtech's standard orderable part number with full production traceability and documentation. |
| uClamp2411ZA | 24V working voltage, ±30kV ESD, but lower 20A IPP rating and higher 33V clamping (at 12A); SOD-323 package (larger, 2-pin). | Targeted at CC/SBU lines in USB Type-C, not VBUS; unsuitable for 40A surge or 22V power rail protection. | Choose uClamp2411ZA only for low-capacitance (<0.5pF), low-current signal-line protection - not as a replacement for SC189CULTRT in power rail roles. |
Compared with SC189CULTRT, TDS2211P.C offers identical performance and form factor with full production support, while uClamp2411ZA serves a different application tier - signal-level vs. power-level protection - and cannot handle the 40A surge or maintain low clamping required for 22V bus safety.
Availability
SC189CULTRT is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch interfaces, and IoT device 22V power rail protection requiring stable component supply, long-term lifecycle assurance, and compliance with IEC 61000-4-2/4-4/4-5 standards.
Supply support for SC189CULTRT 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, and signal integrity.
SC189CULTRT belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered to replace conventional TVS diodes in high-energy, high-voltage EOS protection applications where clamping stability over temperature and current is critical.
FAQ
What is the exact package type and dimensions of SC189CULTRT?
SC189CULTRT uses a 6-lead DFN package measuring 1.6mm × 1.6mm × 0.55mm with exposed pad-less construction. Pin 1 is marked by a laser dot; pins 1–3 are GND, and pins 4–6 are the protected input node. The package is Pb-free, halogen-free, and RoHS/WEEE compliant with UL 94V-0 flammability rating.
Does SC189CULTRT meet IEC 61000-4-5 surge immunity requirements?
Yes, SC189CULTRT is rated for 40A peak pulse current under the IEC 61000-4-5 8/20μs waveform and supports ±1kV combination-wave testing (1.2/50μs voltage + 8/20μs current, RS = 42Ω) for unsymmetrical lines - satisfying Level 4 industrial surge immunity requirements for 22V systems.
How does SC189CULTRT differ from standard TVS diodes in clamping behavior?
Unlike standard TVS diodes whose clamping voltage rises linearly with peak current (VC = VBR + IPP × RDYN), SC189CULTRT uses a triggered FET architecture that maintains clamping at 27.5–28V across its full 24–40A rating and –40°C to +125°C range - eliminating thermal and current-dependent voltage drift.
Can SC189CULTRT be used to protect USB PD 3.0 VBUS lines?
Yes, SC189CULTRT is explicitly validated for USB PD 3.0 VBUS protection in Semtech's application documentation. Its 22V working voltage, 27.5–28V clamping, and ±30kV ESD rating align with USB Type-C specifications, ensuring PD controllers remain within safe operating voltage limits during real-world EOS events.
What is the maximum junction temperature and storage temperature range for SC189CULTRT?
SC189CULTRT has a junction and storage temperature range of –55°C to +150°C, with an operating temperature range of –40°C to +125°C. These ratings are fully specified in the datasheet and validated across electrical parameters including clamping voltage, leakage current, and dynamic resistance.
SC189CULTRT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Series:
- -
- Package/Case:
- 6-UFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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):
- 1.2V
- 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)
SC189CULTRT FAQ
1.How can I place an order for SC189CULTRT through Aetrix?
Please submit a Request for Quotation (RFQ) for SC189CULTRT 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 SC189CULTRT reliable?
The price and inventory of SC189CULTRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC189CULTRT is usually 5 days.
3.What payment methods are accepted for SC189CULTRT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC189CULTRT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC189CULTRT?
SC189CULTRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC189CULTRT 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 SC189CULTRT?
For technical support, including SC189CULTRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC189CULTRT requirements.
6.How does Aetrix verify that SC189CULTRT is sourced from the original manufacturer or authorized distributors?
All SC189CULTRT 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 SC189CULTRT meets industry standards.
7.What is the process for return or replacement of SC189CULTRT?
All SC189CULTRT units undergo pre-shipment inspection (PSI). If there is an issue with SC189CULTRT, 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 SC189CULTRT part is unused and in its original packaging.
Return procedure for SC189CULTRT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SC189CULTRT Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
