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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - Linear + Switching

Semtech Corporation SC3303MLTRT

Name: SC3303MLTRT
Brand: Semtech Corporation
SKU: SC3303MLTRT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SC3303MLTRT

Manufacturer:: Semtech Corporation

Category:: Voltage Regulators - Linear + Switching

Package:: 10-VFDFN Exposed Pad

Datasheet:: SC3303MLTRT.pdf

Description:: IC REG DL BUCK/LNR SYNC 10MLPD

Quantity:: RFQ Add To RFQ list

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Inventory:2,050

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Product details

Overview

SC3303MLTRT 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 6-lead package. It is deployed in USB Type-C PD bus protection where stable clamping under temperature and current stress is critical.

For engineers reviewing the SC3303MLTRT datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage stability across 40A and −40°C to +125°C, low dynamic resistance for minimal voltage rise during surge, and DFN-6 layout compatibility with high-current grounding via pins 1–3 and input routing across pins 4–6.

Technical Context

The SC3303MLTRT 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-27.5–28V across 24A to 40A-due to decreasing R_DS(on) under increasing current.

It operates over −40°C to +125°C with <130–600nA reverse leakage at 22V, 1120W peak pulse power rating, and maintains stable 25–27.9V breakdown voltage (I_t = 1mA). Its functional architecture isolates protection behavior from ambient temperature drift, enabling reliable performance in industrial and mobile power delivery systems.

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) remain below damage threshold
Peak Pulse Current	40A (8/20μs) - meets IEC 61000-4-5 Level 4 surge immunity for industrial equipment and USB PD inputs
ESD Withstand	±30kV contact & air (IEC 61000-4-2) - exceeds Class 4 ESD requirements for handheld and connector-facing interfaces
Dynamic Resistance	20mΩ - enables flat clamping curve; minimizes V_C increase as I_PP rises from 1A to 40A
Junction Capacitance	175pF at 22V, 1MHz - compatible with DC power rails and low-speed control lines; not suitable for >100MHz signal paths

Pinout & Package

SC3303MLTRT 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 dissipation occurs within the silicon FET structure. All six terminals are electrically active: pins 1–3 form a low-inductance ground return path, while pins 4–6 serve as parallel-connected input terminals for surge current handling.

Pin/Terminal	Circuit Role	Design Meaning
Pins 1, 2, 3	GND	Common ground connection; all three must be soldered to PCB ground plane with multiple vias to minimize surge loop inductance
Pins 4, 5, 6	IN	Parallel-connected input terminals for protected line; all three must be routed together to ensure balanced current sharing during 40A transients

Key Features

Feature	Design Value
Constant-clamp architecture	Clamping voltage varies ≤0.5V across full 24–40A range-enables predictable protection margin for 24V-system ICs
Temperature-stable clamping	Clamps at 27–28V from −40°C to +125°C-eliminates derating calculations required for standard TVS diodes
Low dynamic resistance	20mΩ measured between 1A and 40A-reduces voltage overshoot during fast-rising surges (e.g., EFT bursts)
High-energy surge rating	1120W peak pulse power (8/20μs)-supports repeated lightning-surge events per IEC 61000-4-5 without degradation

Applications

USB Type-C Power Delivery Bus Protection	Industrial Load Switch Input Protection
Use Scenario: Protecting 20–22V V_BUS lines in USB-C receptacles against ESD, lightning-induced surges, and hot-plug transients. IC Role / Device Role / Timing Role: Primary EOS shunt protector placed directly at connector, diverting >40A transients to ground before reaching PD controller or load switch. Use Value: Maintains 27.5–28V clamping across temperature and current-prevents false triggering or latch-up in 24V-tolerant PD controllers like TUSB73x or STUSB4500.	Use Scenario: Safeguarding enable and input pins of industrial-grade load switches (e.g., ON Semi NIS5820, TI TPS25940) against EOS in remote meters and robotics. IC Role / Device Role / Timing Role: Front-end transient suppressor placed upstream of load switch VIN/EN, limiting voltage seen by internal FET gate oxide. Use Value: Prevents permanent damage to load switch R_DS(on) and overvoltage lockout circuits by holding clamp <28V even at 125°C ambient.
IoT Edge Node Power Rail Protection	Notebook/Tablet DC Input Protection
Use Scenario: Securing 12–22V DC input rails in battery-powered IoT gateways exposed to ESD during field servicing or connector mating. IC Role / Device Role / Timing Role: Single-device solution for rail-level surge suppression-replaces multi-component TVS+capacitor networks. Use Value: 175pF capacitance avoids signal integrity issues on DC rails; 6-pin DFN footprint saves >50% board area versus SO-8 TVS alternatives.	Use Scenario: Protecting 20V adapter-input circuits in ultrabooks and tablets compliant with USB PD 3.0 specifications. IC Role / Device Role / Timing Role: Standalone clamping device on main power path, coordinated with low-capacitance TVS (e.g., RClamp3371ZC) on data lanes. Use Value: Enables compact, thermally robust design-no thermal pad needed; stable clamping eliminates need for derated TVS selection.

USB Type-C Power Delivery Bus Protection

Industrial Load Switch Input Protection

Use Scenario: Protecting 20–22V V_BUS lines in USB-C receptacles against ESD, lightning-induced surges, and hot-plug transients.

IC Role / Device Role / Timing Role: Primary EOS shunt protector placed directly at connector, diverting >40A transients to ground before reaching PD controller or load switch.

Use Value: Maintains 27.5–28V clamping across temperature and current-prevents false triggering or latch-up in 24V-tolerant PD controllers like TUSB73x or STUSB4500.

Use Scenario: Safeguarding enable and input pins of industrial-grade load switches (e.g., ON Semi NIS5820, TI TPS25940) against EOS in remote meters and robotics.

IC Role / Device Role / Timing Role: Front-end transient suppressor placed upstream of load switch VIN/EN, limiting voltage seen by internal FET gate oxide.

Use Value: Prevents permanent damage to load switch R_DS(on) and overvoltage lockout circuits by holding clamp <28V even at 125°C ambient.

IoT Edge Node Power Rail Protection

Notebook/Tablet DC Input Protection

Use Scenario: Securing 12–22V DC input rails in battery-powered IoT gateways exposed to ESD during field servicing or connector mating.

IC Role / Device Role / Timing Role: Single-device solution for rail-level surge suppression-replaces multi-component TVS+capacitor networks.

Use Value: 175pF capacitance avoids signal integrity issues on DC rails; 6-pin DFN footprint saves >50% board area versus SO-8 TVS alternatives.

Use Scenario: Protecting 20V adapter-input circuits in ultrabooks and tablets compliant with USB PD 3.0 specifications.

IC Role / Device Role / Timing Role: Standalone clamping device on main power path, coordinated with low-capacitance TVS (e.g., RClamp3371ZC) on data lanes.

Use Value: Enables compact, thermally robust design-no thermal pad needed; stable clamping eliminates need for derated TVS selection.

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" and tape/reel packaging (3,000 pcs/reel)	No functional difference; TDS2211P.C is the official Semtech orderable part number for this device	Select TDS2211P.C when sourcing directly from Semtech or authorized distributors requiring exact manufacturer part traceability
SP1003-02HTG	40A 8/20μs rating, but 33V working voltage and 45V clamping at 40A; higher capacitance (350pF); SOD-323 package	Higher clamping voltage limits use with 24V ICs; larger capacitance restricts use on faster control lines	Choose SP1003-02HTG only if system tolerates ≥45V clamp and board space allows SOD-323; not drop-in for SC3303MLTRT

Compared with TDS2211P.C (identical spec twin) and SP1003-02HTG (higher-V_WM, higher-V_C alternative), SC3303MLTRT offers optimal 22V-system protection with minimal board area, stable low-voltage clamping, and guaranteed thermal performance across automotive-grade temperature range-making it the preferred choice for USB PD and industrial 24V-rail designs.

Availability

SC3303MLTRT is available at Aetrix Electronics and suitable for USB Type-C power delivery interfaces, industrial load switch inputs, and IoT edge node DC power rails requiring stable component supply with full traceability and lifecycle support.

Supply support for SC3303MLTRT 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 connectivity.

The Transient Diverting Suppressor (TDS) product line was developed to replace conventional TVS diodes in high-reliability 20–30V power rail applications where clamping voltage stability across temperature and current is mission-critical.

FAQ

What is the maximum continuous operating voltage for SC3303MLTRT?

The SC3303MLTRT has a reverse stand-off voltage (V_RWM) of 22V, meaning it can continuously block up to 22V DC without significant leakage or conduction. This makes SC3303MLTRT suitable for protecting 20V USB PD bus lines and other 22V-rated power rails where sustained voltage exposure occurs.

Does SC3303MLTRT require a thermal pad on the PCB?

No, SC3303MLTRT does not require a thermal pad. Unlike traditional TVS diodes that dissipate energy in the PN junction, SC3303MLTRT uses a surge-rated FET whose energy is dissipated in the channel-eliminating the need for an exposed thermal pad. The DFN package relies on low-inductance grounding through pins 1–3 instead.

How does SC3303MLTRT differ from standard TVS diodes in clamping behavior?

Standard TVS diodes exhibit rising clamping voltage with increasing peak pulse current due to fixed dynamic resistance (V_C = V_BR + I_PP × R_DYN). SC3303MLTRT maintains ~27.5–28V clamping from 24A to 40A because its FET's R_DS(on) decreases under surge, resulting in near-constant V_C-a key advantage confirmed in SC3303MLTRT's datasheet Figure 3.

Can SC3303MLTRT be used on high-speed data lines like USB SS or PCIe?

No, SC3303MLTRT is not suitable for high-speed data lines. With 175pF junction capacitance at 22V, it would severely degrade signal integrity on >100MHz interfaces. SC3303MLTRT is intended for DC power rails and low-speed control lines; for USB SuperSpeed or DP/DM, use sub-0.3pF devices like RClamp3371ZC instead.

What is the recommended PCB layout for optimal surge performance of SC3303MLTRT?

Place SC3303MLTRT as close as possible to the protected connector. Route pins 4–6 together in a single short, wide trace to the protected line, and connect pins 1–3 directly to a solid ground plane using ≥3 vias. Avoid stubs or splits-this layout minimizes parasitic inductance and ensures SC3303MLTRT handles full 40A surge current without voltage overshoot.

SC3303MLTRT Specifications

Product attributes: Attribute value

Manufacturer:: Semtech Corporation

Series:: EcoSpeed®

Package/Case:: 10-VFDFN Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Active

Topology:: Step-Down (Buck) Synchronous (2), Linear (LDO) (2)

Number of Outputs:: 2

Frequency - Switching:: 200kHz ~ 1MHz

Voltage/Current - Output 1:: 0.75V ~ 7.5V, 3A

Voltage/Current - Output 2:: 5V, 100mA

Voltage/Current - Output 3:: -

w/LED Driver:: No

w/Supervisor:: No

w/Sequencer:: No

Voltage - Supply:: 5.5V ~ 28V

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 10-MLPD (3x3)

SC3303MLTRT FAQ

1.How can I place an order for SC3303MLTRT through Aetrix?

Please submit a Request for Quotation (RFQ) for SC3303MLTRT 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 SC3303MLTRT reliable?

The price and inventory of SC3303MLTRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC3303MLTRT is usually 5 days.

3.What payment methods are accepted for SC3303MLTRT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC3303MLTRT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SC3303MLTRT?

SC3303MLTRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SC3303MLTRT 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 SC3303MLTRT?

For technical support, including SC3303MLTRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC3303MLTRT requirements.

6.How does Aetrix verify that SC3303MLTRT is sourced from the original manufacturer or authorized distributors?

All SC3303MLTRT 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 SC3303MLTRT meets industry standards.

7.What is the process for return or replacement of SC3303MLTRT?

All SC3303MLTRT units undergo pre-shipment inspection (PSI). If there is an issue with SC3303MLTRT, 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 SC3303MLTRT part is unused and in its original packaging.

Return procedure for SC3303MLTRT:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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