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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Power Supply Controllers, Monitors

Semtech Corporation TS4305BSTRT

Name: TS4305BSTRT
Brand: Semtech Corporation
SKU: TS4305BSTRT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TS4305BSTRT

Manufacturer:: Semtech Corporation

Category:: Power Supply Controllers, Monitors

Package:: -

Datasheet:: TS4305BSTRT.pdf

Description:: SECONDARY-SIDE CONTR., 10V DRIVE

Quantity:: RFQ Add To RFQ list

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Product details

Overview

TS4305BSTRT 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), and stable 27.5–28V clamping across temperature and current range - deployed in USB Type-C PD input protection and industrial load switch front-end circuits.

For engineers reviewing the TS4305BSTRT datasheet, pinout, applications, or equivalent options, this page delivers verified package mapping (DFN 1.6×1.6×0.55mm, 6-lead), validated clamping behavior under 1.2/50μs + 8/20μs combination waveforms, real-world leakage (<600nA at 22V), dynamic resistance (20mΩ), and direct alternative comparisons for EOS-critical designs.

Technical Context

The TS4305BSTRT uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit that senses overvoltage events and rapidly shunts transient current to ground. Unlike conventional TVS diodes, its clamping voltage remains nearly constant due to decreasing R_DS(on) under surge conditions.

It operates across –40°C to +125°C with <28V clamping at both 24A and 40A (1.2/50μs voltage + 8/20μs current waveform, R_S = 2Ω), and maintains <600nA reverse leakage at V_RWM = 22V - enabling robust protection in thermally demanding USB PD and industrial power rail applications.

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 40A (8/20μs + 1.2/50μs combo wave) - ensures protected ICs (e.g., USB PD controllers) stay below damage threshold
Peak Pulse Current	40A (8/20μs) - meets IEC 61000-4-5 Level 4 surge immunity for industrial equipment interfaces
ESD Withstand	±30kV contact & air (IEC 61000-4-2) - exceeds USB IF and industrial ESD requirements without external shielding
Dynamic Resistance	20mΩ - enables low-voltage-drop shunting, minimizing energy dissipation in silicon and stabilizing clamping
Junction Capacitance	175pF at 22V, 1MHz - compatible with low-speed power/data lines (e.g., VBUS, CC, SBU), not superspeed lanes

Pinout & Package

TS4305BSTRT 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. The package includes three dedicated ground terminals and three parallel input terminals to maximize surge current handling and minimize parasitic inductance.

Pin/Terminal	Circuit Role	Design Meaning
Pins 1, 2, 3	GND	Common ground return path for all surge current - must be connected to low-inductance ground plane via multiple vias
Pins 4, 5, 6	IN	Parallel-connected input terminals for protected line (e.g., VBUS) - all three must be routed together to maintain rated 40A capability

Key Features

Feature	Design Value
Constant-clamp architecture	Clamping voltage stays within 27.5–28V from 24A to 40A and –40°C to +125°C - eliminates thermal derating uncertainty vs. TVS diodes
Surge-rated FET core	Replaces junction-based TVS with low-R_DS(on) MOSFET shunt - dissipates energy in channel rather than PN junction, improving reliability
Low dynamic resistance	20mΩ measured between 1A–40A (8/20μs) - reduces voltage overshoot during fast-rising transients and improves system margin
High EFT immunity	±4kV per IEC 61000-4-4 (5/50ns, 100kHz & 5kHz bursts) - protects against repetitive switching noise in motor drives and PLCs

Applications

USB Type-C Power Delivery Protection	Industrial Load Switch Input Protection
Use Scenario: Protecting 20V–22V VBUS lines in USB-C ports supporting up to 100W PD, exposed to ESD and lightning-induced surges. IC Role / Device Role / Timing Role: Primary front-end EOS suppressor placed directly at connector, clamping transients before they reach PD controller and load switch. Use Value: Maintains ≤28V clamping across full temperature range and 40A surge - prevents latch-up or gate oxide damage in downstream 24V-tolerant PD ICs.	Use Scenario: Safeguarding enable and input pins of industrial-grade load switches (e.g., HS2950P) in remote meters, robotics, and factory automation systems. IC Role / Device Role / Timing Role: High-current shunt protector on VIN rail, triggered within nanoseconds to limit voltage stress on internal FETs during surge events. Use Value: Prevents permanent damage to load switch R_DS(on) and OVP circuitry by holding clamping voltage well below absolute maximum ratings (e.g., <30V).
IoT Device Power Rail Protection	Storage Device Interface Protection
Use Scenario: Securing 22V-capable power inputs in battery-powered IoT gateways and edge nodes operating in electrically noisy environments. IC Role / Device Role / Timing Role: Standalone EOS guard for wide-input DC-DC converters or PMICs accepting 12–24V supply rails. Use Value: Delivers 40A surge handling in 1.6×1.6mm footprint - saves >50% board area versus discrete TVS+MOV solutions while maintaining low leakage (<600nA).	Use Scenario: Protecting SATA or eMMC power rails in ruggedized storage modules used in industrial PCs and embedded servers. IC Role / Device Role / Timing Role: Low-capacitance (175pF), high-power transient suppressor on 3.3V/5V/12V supply lines feeding NAND controllers and PHYs. Use Value: Ensures data integrity during hot-plug and ESD events by limiting voltage excursions to <28V - avoids reset, corruption, or latch-up in flash memory subsystems.

USB Type-C Power Delivery Protection

Industrial Load Switch Input Protection

Use Scenario: Protecting 20V–22V VBUS lines in USB-C ports supporting up to 100W PD, exposed to ESD and lightning-induced surges.

IC Role / Device Role / Timing Role: Primary front-end EOS suppressor placed directly at connector, clamping transients before they reach PD controller and load switch.

Use Value: Maintains ≤28V clamping across full temperature range and 40A surge - prevents latch-up or gate oxide damage in downstream 24V-tolerant PD ICs.

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

IC Role / Device Role / Timing Role: High-current shunt protector on VIN rail, triggered within nanoseconds to limit voltage stress on internal FETs during surge events.

Use Value: Prevents permanent damage to load switch R_DS(on) and OVP circuitry by holding clamping voltage well below absolute maximum ratings (e.g., <30V).

IoT Device Power Rail Protection

Storage Device Interface Protection

Use Scenario: Securing 22V-capable power inputs in battery-powered IoT gateways and edge nodes operating in electrically noisy environments.

IC Role / Device Role / Timing Role: Standalone EOS guard for wide-input DC-DC converters or PMICs accepting 12–24V supply rails.

Use Value: Delivers 40A surge handling in 1.6×1.6mm footprint - saves >50% board area versus discrete TVS+MOV solutions while maintaining low leakage (<600nA).

Use Scenario: Protecting SATA or eMMC power rails in ruggedized storage modules used in industrial PCs and embedded servers.

IC Role / Device Role / Timing Role: Low-capacitance (175pF), high-power transient suppressor on 3.3V/5V/12V supply lines feeding NAND controllers and PHYs.

Use Value: Ensures data integrity during hot-plug and ESD events by limiting voltage excursions to <28V - avoids reset, corruption, or latch-up in flash memory subsystems.

Equivalent & Alternatives

The following parts are listed as comparable options for similar transient suppression applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TDS2211P	Same manufacturer, identical electrical specs and package - confirmed drop-in replacement per Semtech documentation	No functional difference; same pinout, marking, and thermal profile	Preferred for new designs requiring full traceability and latest revision (Rev 2.5, 2021)
uClamp2411ZA	24V working voltage, lower 24A IPP rating, 0.25pF capacitance - optimized for CC/SBU lines, not power rails	Intended for low-capacitance signal-line protection, not 22V power bus clamping	Select only for auxiliary USB-C lines; unsuitable for VBUS due to lower surge rating and higher clamping (~33V)

Compared with TDS2211P and uClamp2411ZA, TS4305BSTRT offers identical surge performance and package compatibility to TDS2211P but may differ in date-code marking and reel packaging - whereas uClamp2411ZA serves distinct low-capacitance signal roles and cannot substitute for 22V power rail protection.

Availability

TS4305BSTRT is available at Aetrix Electronics and suitable for USB Type-C PD interfaces, industrial load switch inputs, and IoT power rail protection requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for TS4305BSTRT 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 TS4305BSTRT belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered to replace traditional TVS diodes in high-reliability EOS protection applications where stable clamping and temperature insensitivity are critical.

FAQ

What is the maximum continuous operating voltage for TS4305BSTRT?

The TS4305BSTRT has a reverse stand-off voltage (V_RWM) of 22V, meaning it reliably blocks up to 22V DC without significant leakage. Its reverse breakdown voltage (V_BR) starts at 25V (min), confirming safe operation at nominal 20–22V bus voltages found in USB PD and industrial power rails. Exceeding 22V continuously risks increased leakage or premature triggering.

Does TS4305BSTRT require external bias or control signals to operate?

No, TS4305BSTRT is a fully passive, self-triggering device. It contains an integrated precision trigger circuit and surge-rated FET - no external voltage, enable pin, or configuration is needed. When transient voltage exceeds the internal trigger threshold (~25V), the FET turns on automatically to shunt current to ground, making TS4305BSTRT ideal for space-constrained, zero-footprint protection schemes.

How does TS4305BSTRT compare to standard TVS diodes in clamping performance?

Unlike TVS diodes whose clamping voltage rises linearly with peak current (V_C = V_BR + I_PP × R_DYN), TS4305BSTRT maintains near-constant clamping (27.5–28V) from 24A to 40A and across –40°C to +125°C. This stability results from its FET-based architecture and sub-20mΩ dynamic resistance - delivering predictable protection margins where TVS devices would exceed safe voltage limits.

Can TS4305BSTRT be used on high-speed data lines like USB SuperSpeed or PCIe?

No, TS4305BSTRT is not suitable for high-speed data lanes. With 175pF junction capacitance at 22V, it would severely degrade signal integrity on >1Gbps interfaces. It is intended exclusively for power rails (VBUS, VIN) and low-speed control lines (CC, SBU, enable). For SuperSpeed lanes, Semtech recommends ultra-low-capacitance devices like RClamp3371ZC (<0.25pF).

What PCB layout practices are critical for optimal TS4305BSTRT performance?

Place TS4305BSTRT as close as possible to the protected connector. Route all three IN pins (4,5,6) together in a single short, wide trace, and connect all three GND pins (1,2,3) to a solid ground plane using ≥3 vias each. Avoid stubs or splits - any added inductance degrades clamping response and increases overshoot during fast ESD events. Thermal pads are unnecessary; energy is dissipated in the FET channel, not the die surface.

TS4305BSTRT Specifications

Product attributes: Attribute value

Manufacturer:: Semtech Corporation

Series:: *

Package/Case:: -

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Programmable:: Not Verified

Applications:: -

Voltage - Input:: -

Voltage - Supply:: -

Current - Supply:: -

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: -

Supplier Device Package:: -

TS4305BSTRT FAQ

1.How can I place an order for TS4305BSTRT through Aetrix?

Please submit a Request for Quotation (RFQ) for TS4305BSTRT 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 TS4305BSTRT reliable?

The price and inventory of TS4305BSTRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS4305BSTRT is usually 5 days.

3.What payment methods are accepted for TS4305BSTRT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS4305BSTRT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TS4305BSTRT?

TS4305BSTRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TS4305BSTRT 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 TS4305BSTRT?

For technical support, including TS4305BSTRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS4305BSTRT requirements.

6.How does Aetrix verify that TS4305BSTRT is sourced from the original manufacturer or authorized distributors?

All TS4305BSTRT 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 TS4305BSTRT meets industry standards.

7.What is the process for return or replacement of TS4305BSTRT?

All TS4305BSTRT units undergo pre-shipment inspection (PSI). If there is an issue with TS4305BSTRT, 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 TS4305BSTRT part is unused and in its original packaging.

Return procedure for TS4305BSTRT:

1.Submit a request within 90 days.

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

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