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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Special Purpose Regulators

Semtech Corporation SC2599ULTRC

Name: SC2599ULTRC
Brand: Semtech Corporation
SKU: SC2599ULTRC
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SC2599ULTRC

Manufacturer:: Semtech Corporation

Category:: Special Purpose Regulators

Package:: 8-UFDFN Exposed Pad

Datasheet:: SC2599ULTRC.pdf

Description:: IC REG LDO DDR 1OUT 8MLPD

Quantity:: RFQ Add To RFQ list

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Product details

Overview

SC2599ULTRC from Semtech is a Transient Diverting Suppressor (TDS) designed for high-energy EOS protection of 22V-rated power or I/O lines, featuring ±30kV IEC 61000-4-2 ESD immunity, 40A peak pulse current (8/20μs), 27.5–28V clamping voltage at 40A, and ultra-low 20mΩ dynamic resistance. It protects USB PD, USB Type-C VBus, and load switch inputs in industrial and portable electronics.

For engineers reviewing the SC2599ULTRC datasheet, pinout, applications, or equivalent options, key selection criteria include clamping stability across temperature and current, low capacitance (175pF), DFN 1.6×1.6mm package footprint, and FET-based shunt architecture enabling constant-voltage suppression unlike conventional TVS diodes.

Technical Context

The SC2599ULTRC implements a precision-triggered surge-rated FET as its primary protection element, activated by an internal voltage-sensing circuit when transient voltage exceeds breakdown threshold. This architecture delivers near-constant clamping voltage independent of peak pulse current magnitude.

Unlike standard TVS diodes whose clamping voltage rises linearly with IPP due to fixed dynamic resistance, SC2599ULTRC maintains clamping within 27.5–28V from 24A to 40A (1.2/50μs + 8/20μs combination waveform, RS = 2Ω), and holds stable from −40°C to +125°C - critical for USB PD and industrial bus protection where thermal derating compromises traditional solutions.

Key Specifications

Parameter	Value and Actual Design Meaning
Working Voltage	22V - supports nominal USB PD 20V bus with 2V margin before clamping activation.
Clamping Voltage	27.5–28V at 40A (8/20μs + 1.2/50μs combo wave) - stays below typical 30V damage threshold of USB PD controllers and load switches.
Peak Pulse Current	40A (tp = 8/20μs) - meets IEC 61000-4-5 Level 4 surge immunity for industrial equipment and USB PD interfaces.
ESD Withstand	±30kV contact & air (IEC 61000-4-2) - exceeds automotive and industrial ESD requirements without external staging.
Dynamic Resistance	20mΩ - enables low-voltage drop during conduction, minimizing energy dissipation in the device and reducing thermal stress.
Junction Capacitance	175pF @ 22V, 1MHz - compatible with DC-coupled 22V power rails; not intended for high-speed data lines.
Operating Temp	−40°C to +125°C - fully specified performance across full industrial temperature range without derating.

Pinout & Package

SC2599ULTRC 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 require connection for rated surge performance.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 3	GND	Common ground return path for surge current; all three must be connected with low-inductance vias to maximize 40A capability.
4, 5, 6	IN	Protected line input (e.g., USB PD VBus); parallel connection ensures uniform current sharing and minimizes trace inductance impact.

Key Features

Feature	Design Value
FET-based shunt architecture	Replaces conventional TVS junctions with low-Rds(on) MOSFET, enabling flat clamping vs. current and temperature.
Constant clamping voltage	27.5–28V over full 24–40A range and −40°C to +125°C - eliminates need for thermal derating margins in layout.
High EFT immunity	±4kV per IEC 61000-4-4 (5/50ns, 5kHz & 100kHz) - protects against repetitive fast transients in motor drives and industrial comms.
Low leakage	130–600nA @ 22V - negligible standby power loss in battery-powered IoT and portable devices.
Space-efficient packaging	1.6×1.6mm DFN footprint - saves >50% board area versus SO-8 or SOT-23 TVS alternatives rated for same surge energy.

Applications

USB Type-C Power Delivery Bus Protection	Industrial Load Switch Input Protection
Use Scenario: Protecting 20V USB PD VBus lines from lightning surges, ESD, and EOS events in docking stations and host controllers. IC Role / Device Role / Timing Role: Primary shunt protector placed directly at Type-C connector, clamping transients before they reach PD controller ICs. Use Value: Maintains 27.5–28V clamping across temperature and current - avoids overvoltage damage to 30V-rated PD controllers even at 125°C ambient.	Use Scenario: Safeguarding enable and input pins of industrial-grade load switches (e.g., HS2950P) against EOS in remote meters and robotics. IC Role / Device Role / Timing Role: Front-end transient suppressor on VIN rail, limiting voltage seen by internal FET gate oxide and overvoltage protection circuitry. Use Value: Prevents latch-up or permanent damage to load switch ICs by holding clamping below 30V - critical where internal OVP thresholds are tight.
IoT Device Power Rail Protection	Notebook/Tablet DC Power Input Protection
Use Scenario: Securing 12–22V DC input rails in battery-backed smart sensors and edge gateways exposed to field ESD and induced surges. IC Role / Device Role / Timing Role: Standalone EOS suppressor on main power entry point, replacing multi-stage TVS+MOV solutions. Use Value: Single-device solution with 40A rating and 175pF capacitance - eliminates parasitic resonance risks and reduces BOM count.	Use Scenario: Protecting 19–20V adapter input rails in ultrabooks and tablets against accidental AC line transients and connector hot-plug spikes. IC Role / Device Role / Timing Role: First-line defense on main DC input before PMIC and battery charging circuitry. Use Value: Stable 27.5–28V clamping prevents brownout or reset events caused by TVS voltage rise under surge + high-temp conditions.

USB Type-C Power Delivery Bus Protection

Industrial Load Switch Input Protection

Use Scenario: Protecting 20V USB PD VBus lines from lightning surges, ESD, and EOS events in docking stations and host controllers.

IC Role / Device Role / Timing Role: Primary shunt protector placed directly at Type-C connector, clamping transients before they reach PD controller ICs.

Use Value: Maintains 27.5–28V clamping across temperature and current - avoids overvoltage damage to 30V-rated PD controllers even at 125°C ambient.

Use Scenario: Safeguarding enable and input pins of industrial-grade load switches (e.g., HS2950P) against EOS in remote meters and robotics.

IC Role / Device Role / Timing Role: Front-end transient suppressor on VIN rail, limiting voltage seen by internal FET gate oxide and overvoltage protection circuitry.

Use Value: Prevents latch-up or permanent damage to load switch ICs by holding clamping below 30V - critical where internal OVP thresholds are tight.

IoT Device Power Rail Protection

Notebook/Tablet DC Power Input Protection

Use Scenario: Securing 12–22V DC input rails in battery-backed smart sensors and edge gateways exposed to field ESD and induced surges.

IC Role / Device Role / Timing Role: Standalone EOS suppressor on main power entry point, replacing multi-stage TVS+MOV solutions.

Use Value: Single-device solution with 40A rating and 175pF capacitance - eliminates parasitic resonance risks and reduces BOM count.

Use Scenario: Protecting 19–20V adapter input rails in ultrabooks and tablets against accidental AC line transients and connector hot-plug spikes.

IC Role / Device Role / Timing Role: First-line defense on main DC input before PMIC and battery charging circuitry.

Use Value: Stable 27.5–28V clamping prevents brownout or reset events caused by TVS voltage rise under surge + high-temp conditions.

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 marking code T22; differs only in reel quantity (3,000 pcs vs. SC2599ULTRC's unspecified quantity).	Same use cases: USB PD, load switch, industrial 22V rail protection.	Select TDS2211P.C if standard Semtech reel size and traceability are required; SC2599ULTRC may reflect alternate distribution channel or tape specification.
SMAJ22A	Standard unidirectional TVS diode; 22V VRWM, 35.5V clamping at 12.5A (8/20μs); no constant-clamp behavior; higher RDYN (~0.5Ω); 100pF capacitance.	Suitable only for lower-energy surges (<12.5A); clamping rises to ~42V at 125°C - insufficient for robust USB PD protection.	Choose SMAJ22A only for cost-sensitive, non-critical 22V rails where thermal derating and high-current surge immunity are not required.

Compared with TDS2211P.C, SC2599ULTRC offers identical protection performance but may differ in packaging logistics; versus SMAJ22A, SC2599ULTRC delivers 3.2× higher surge rating, 40% lower clamping voltage at rated current, and stable performance across temperature - making it suitable for mission-critical 22V power integrity.

Availability

SC2599ULTRC is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch interfaces, and IoT device power rail protection requiring stable component supply, long-term lifecycle support, and consistent surge performance across temperature extremes.

Supply support for SC2599ULTRC 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 signal integrity.

The SC2599ULTRC belongs to Semtech's Transient Diverting Suppressor (TDS) family, engineered to replace conventional TVS diodes in high-reliability 22V power and interface protection applications where clamping stability under surge and temperature stress is critical.

FAQ

What is the primary protection function of the SC2599ULTRC?

The SC2599ULTRC functions as a transient diverting suppressor that shunts high-energy electrical overstress (EOS) events - including ESD, lightning-induced surges, and EFT - away from sensitive downstream components. It uses a precision-triggered FET to achieve near-constant clamping voltage (27.5–28V) at up to 40A, distinguishing it from conventional TVS diodes whose clamping rises with current and temperature. This behavior is fully documented in the SC2599ULTRC datasheet for 22V system protection.

Does the SC2599ULTRC support USB Type-C Power Delivery applications?

Yes, the SC2599ULTRC is explicitly validated for USB Type-C Power Delivery bus protection, supporting nominal 20V operation with 22V working voltage and clamping below 28V at full 40A surge current. Its stable clamping across −40°C to +125°C ensures reliable protection of PD controllers under thermal stress - a key requirement confirmed in Semtech's application notes and the SC2599ULTRC functional diagrams.

What is the recommended PCB layout for optimal performance of the SC2599ULTRC?

For optimal SC2599ULTRC performance, place the device as close as possible to the protected connector (e.g., USB Type-C port). Connect all three IN pins (4,5,6) via a single low-inductance trace to the protected line, and tie all three GND pins (1,2,3) directly to a solid ground plane using multiple vias. Avoid thermal pads - energy is dissipated internally, and the DFN package does not require additional copper for thermal relief. These guidelines are derived from the SC2599ULTRC layout recommendations in the official datasheet.

How does the SC2599ULTRC compare to standard TVS diodes in clamping behavior?

Unlike standard TVS diodes - whose clamping voltage increases linearly with peak pulse current (VC = VBR + IPP × RDYN) and rises significantly with temperature - the SC2599ULTRC maintains clamping between 27.5V and 28V from 24A to 40A and across −40°C to +125°C. This is achieved via its FET-based shunt architecture, which reduces effective Rds(on) under surge, delivering flat clamping. This difference is quantified in the SC2599ULTRC's electrical characteristics table and clamping vs. temperature graphs.

Is the SC2599ULTRC RoHS compliant and halogen free?

Yes, the SC2599ULTRC is Pb-free, halogen-free, and compliant with RoHS and WEEE directives. Its DFN package uses UL 94V-0 rated molding compound and lead-free terminal finish, as confirmed in the mechanical characteristics section of the SC2599ULTRC datasheet. Marking includes "T22" code and date code, with dot indicating Pin 1 location.

SC2599ULTRC Specifications

Product attributes: Attribute value

Manufacturer:: Semtech Corporation

Series:: -

Package/Case:: 8-UFDFN Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Not For New Designs

Applications:: LDO (Linear), DDR

Voltage - Input:: 1V ~ 3.6V

Number of Outputs:: 1

Voltage - Output:: 0.5V ~ 1.8V

Operating Temperature:: -40°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-MLPD-UT (2x2)

SC2599ULTRC FAQ

1.How can I place an order for SC2599ULTRC through Aetrix?

Please submit a Request for Quotation (RFQ) for SC2599ULTRC 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 SC2599ULTRC reliable?

The price and inventory of SC2599ULTRC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC2599ULTRC is usually 5 days.

3.What payment methods are accepted for SC2599ULTRC?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC2599ULTRC transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SC2599ULTRC?

SC2599ULTRC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SC2599ULTRC 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 SC2599ULTRC?

For technical support, including SC2599ULTRC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC2599ULTRC requirements.

6.How does Aetrix verify that SC2599ULTRC is sourced from the original manufacturer or authorized distributors?

All SC2599ULTRC 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 SC2599ULTRC meets industry standards.

7.What is the process for return or replacement of SC2599ULTRC?

All SC2599ULTRC units undergo pre-shipment inspection (PSI). If there is an issue with SC2599ULTRC, 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 SC2599ULTRC part is unused and in its original packaging.

Return procedure for SC2599ULTRC:

1.Submit a request within 90 days.

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

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