My Inquiry
My Account
Semtech Corporation SC120ULTRT
- Part No.:
- SC120ULTRT
- Manufacturer:
- Semtech Corporation
- Package:
- 6-UFDFN Exposed Pad
- Datasheet:
-
SC120ULTRT.pdf
- Description:
- IC REG BOOST ADJ/1.8V 80MA 6MLPD
- Quantity:
- Payment:
- Shipping:
Inventory:2,536
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SC120ULTRT 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 a stable 27.5–28V clamping voltage across temperature and current range - enabling robust USB Type-C PD and industrial load switch input protection.
For engineers reviewing the SC120ULTRT datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage stability under surge, low dynamic resistance (<20 mΩ), junction capacitance (175 pF), and DFN 1.6×1.6mm 6-lead package compatibility with high-density USB and IoT layouts.
Technical Context
The SC120ULTRT 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 conventional TVS diodes, its clamping voltage remains nearly constant - independent of peak pulse current (24A to 40A) and operating temperature (−40°C to +125°C).
This architecture achieves <20 mΩ dynamic resistance and eliminates the linear VC = VBR + IPP × RDYN dependency. The device protects one line with bidirectional capability, rated for 22V reverse stand-off and 27.9V typical breakdown, and dissipates energy in the FET channel rather than the junction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22 V - matches nominal USB PD bus and industrial 24V rail systems without derating. |
| Clamping Voltage | 27.5–28 V at 40A (8/20μs + 1.2/50μs combo wave) - stays below 28V across full surge range and temp, protecting sensitive 30V-tolerant controllers. |
| Peak Pulse Current | 40 A (8/20μs) - meets IEC 61000-4-5 Level 4 industrial surge requirements. |
| ESD Withstand | ±30 kV contact & air (IEC 61000-4-2) - exceeds automotive and industrial ESD immunity mandates. |
| Dynamic Resistance | 20 mΩ - ensures minimal voltage rise under high di/dt transients, critical for fast-rising lightning surges. |
| Junction Capacitance | 175 pF @ 22V, 1MHz - compatible with DC/low-speed power and control lines; not intended for >100MHz signal paths. |
| Operating Temp | −40°C to +125°C - supports extended industrial and automotive under-hood environments. |
Pinout & Package
SC120ULTRT is housed in a RoHS-compliant DFN 1.6 mm × 1.6 mm × 0.55 mm 6-lead package with exposed thermal pad (no solder mask defined). All pins must be connected: Pins 1–3 are dedicated GND terminals; Pins 4–6 form a parallel input node for the protected line.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | Ground (GND) | Low-inductance return path for surge current; all three must be vias-connected to internal ground plane for full 40A rating. |
| Pins 4, 5, 6 | Input (IN) | Parallel-connected anode/cathode node for bidirectional EOS protection; connects directly to protected bus (e.g., VBUS in USB-C). |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.5 V from 24A to 40A surge - eliminates design margin inflation needed with traditional TVS diodes. |
| FET-based shunt topology | Dissipates surge energy in low-Rds(on) channel instead of PN junction - enables stable performance up to +125°C ambient. |
| Ultra-low dynamic resistance | 20 mΩ measured between 1A–40A (8/20μs) - minimizes overshoot during fast-rising transients like EFT bursts. |
| High-energy ESD immunity | ±30 kV contact discharge - allows direct placement at external connectors without additional shielding or spacing. |
| Space-optimized packaging | 1.6×1.6 mm footprint saves >60% board area vs. SO-8 or SOT-23 TVS alternatives - ideal for ultra-thin notebooks and compact IoT modules. |
Applications
| USB Type-C Power Delivery | Industrial Load Switch Input Protection |
|---|---|
|
Use Scenario: Protecting VBUS lines in USB-C ports supporting up to 20V/5A 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 ≤28V across −40°C to +125°C - prevents damage to 30V-rated PD controllers even at full thermal load. |
Use Scenario: Safeguarding input rails of e-fuse or load switches (e.g., HS2950P) in remote meters and robotics. IC Role / Device Role / Timing Role: Front-end transient shunt that limits voltage stress on internal FET gate oxide and drain-source breakdown. Use Value: Enables use of cost-optimized 30V-rated load switches in 24V industrial systems without overvoltage derating. |
| IoT Edge Node Power Rails | Tablet & Notebook DC Power Inputs |
|
Use Scenario: Securing 12–24V DC inputs of battery-powered sensors and gateway devices exposed to field ESD and induced surges. IC Role / Device Role / Timing Role: Single-device solution replacing multi-stage TVS + MOV designs for compact, low-BOM-count protection. Use Value: 40A surge rating and ±30kV ESD withstand eliminate need for secondary protection stages in Class II insulated designs. |
Use Scenario: Protecting main DC input (e.g., barrel jack or USB-C port) of portable computing devices against accidental adapter swaps and lightning-induced surges. IC Role / Device Role / Timing Role: First-line defense before PMIC or buck converter input stage. Use Value: 175 pF capacitance avoids signal integrity issues on DC-biased rails while delivering 1120W peak pulse power handling. |
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 - confirmed drop-in replacement per Semtech documentation. | Same USB-C, load switch, and industrial rail use cases; identical layout and thermal behavior. | Select when sourcing from authorized Semtech channels with full traceability and lifecycle support. |
| SMAJ22A | Standard unidirectional TVS diode; 33.2V min clamping at 12.3A (8/20μs); 100x higher dynamic resistance (~2 Ω); 10× higher clamping variation with temperature. | Limited to lower-energy applications; requires larger layout margin and thermal relief; unsuitable for 125°C operation. | Consider only for cost-sensitive, non-automotive, <20A surge environments where clamping stability is secondary. |
Compared with TDS2211P, SC120ULTRT offers identical performance and fit; compared with SMAJ22A, SC120ULTRT delivers 100× lower dynamic resistance, stable clamping across temperature, and 3.3× higher surge current rating - enabling smaller margins and higher reliability in USB PD and industrial 24V systems.
Availability
SC120ULTRT is available at Aetrix Electronics and suitable for USB Type-C PD interfaces, industrial load switch inputs, and IoT edge node power rails requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.
Supply support for SC120ULTRT 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 ICs for power management, protection, and signal integrity.
The SC120ULTRT belongs to Semtech's Transient Diverting Suppressor (TDS) product line - engineered to replace conventional TVS diodes in high-reliability 22V power and interface protection applications where clamping stability and temperature insensitivity are critical.
FAQ
What is the maximum continuous operating voltage for SC120ULTRT?
The SC120ULTRT has a reverse stand-off voltage (VRWM) of 22 V, meaning it can continuously block up to 22 V DC or RMS without conduction. This rating aligns with USB PD 3.0 VBUS levels and industrial 24V nominal rails with appropriate derating. Exceeding 22 V risks premature leakage or breakdown - always verify system tolerances against the 25 V minimum breakdown voltage (VBR) specified in the datasheet.
Does SC120ULTRT require a thermal pad or heatsink on the PCB?
No, the SC120ULTRT does not require an external thermal pad or heatsink. Its FET-based architecture dissipates surge energy in the channel rather than the junction, and the DFN package is designed for direct copper connection to ground planes via Pins 1–3. Layout guidelines emphasize multiple vias to internal ground layers - not thermal mass - to minimize inductance and maximize 40A surge current handling.
Can SC120ULTRT protect high-speed data lines like USB SuperSpeed or PCIe?
No, SC120ULTRT is not suitable for high-speed data lines. With 175 pF junction capacitance at 22 V, it would severely degrade signal integrity on differential pairs operating above ~10 MHz. It is expressly designed for DC power rails and low-speed control lines. For USB SS, DP/DM, or PCIe lanes, Semtech recommends low-capacitance TVS devices such as RClamp3371ZC (<0.25 pF).
How does SC120ULTRT compare to standard TVS diodes in temperature stability?
Unlike standard TVS diodes whose clamping voltage rises linearly with temperature and peak current, the SC120ULTRT maintains clamping within 27.5–28 V from −40°C to +125°C and across 24A–40A surge currents. This stability stems from its FET shunt topology and precision trigger circuit - eliminating the VBR + IPP × RDYN dependency that causes conventional TVS devices to exceed safe voltage thresholds at elevated temperatures.
Is SC120ULTRT pin-compatible with other Semtech TDS devices?
SC120ULTRT shares the same DFN 1.6×1.6mm 6-lead package and pin configuration (Pins 1–3 = GND, Pins 4–6 = IN) with TDS2211P and TDS2411P. However, voltage ratings differ: TDS2411P is rated for 24 V VRWM. While mechanical layout is identical, electrical substitution requires verification of working voltage, clamping, and surge rating alignment with the target application.
SC120ULTRT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Series:
- -
- Package/Case:
- 6-UFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable (Fixed)
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 0.7V
- Voltage - Input (Max):
- 4.5V
- Voltage - Output (Min/Fixed):
- 1.8V (3.3V)
- Voltage - Output (Max):
- 5V
- Current - Output:
- 80mA
- Frequency - Switching:
- 1.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-MLPD-UT (1.5x2)
SC120ULTRT FAQ
1.How can I place an order for SC120ULTRT through Aetrix?
Please submit a Request for Quotation (RFQ) for SC120ULTRT 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 SC120ULTRT reliable?
The price and inventory of SC120ULTRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC120ULTRT is usually 5 days.
3.What payment methods are accepted for SC120ULTRT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC120ULTRT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC120ULTRT?
SC120ULTRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC120ULTRT 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 SC120ULTRT?
For technical support, including SC120ULTRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC120ULTRT requirements.
6.How does Aetrix verify that SC120ULTRT is sourced from the original manufacturer or authorized distributors?
All SC120ULTRT 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 SC120ULTRT meets industry standards.
7.What is the process for return or replacement of SC120ULTRT?
All SC120ULTRT units undergo pre-shipment inspection (PSI). If there is an issue with SC120ULTRT, 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 SC120ULTRT part is unused and in its original packaging.
Return procedure for SC120ULTRT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SC120ULTRT 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 …
