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

Semtech Corporation TS4305BMSTRT

Name: TS4305BMSTRT
Brand: Semtech Corporation
SKU: TS4305BMSTRT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TS4305BMSTRT

Manufacturer:: Semtech Corporation

Category:: Power Supply Controllers, Monitors

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: TS4305BMSTRT.pdf

Description:: IC SYNC FET CONTROL 8SOIC

Quantity:: RFQ Add To RFQ list

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Inventory:1,046

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Product details

Overview

TS4305BMSTRT 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 tightly regulated 27.6–28V clamping voltage across full temperature (−40°C to +125°C) and current range - enabling robust USB PD and industrial load switch input protection.

For engineers reviewing the TS4305BMSTRT datasheet, pinout, applications, or equivalent options, this page provides verified electrical parameters, DFN-6 package layout guidance, real-world clamping stability data, and validated alternatives for 22V bus protection in USB Type-C, IoT, and industrial equipment designs.

Technical Context

The TS4305BMSTRT 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 - ~27.6–28V at both 24A and 40A - due to decreasing R_DS(on) under surge conditions.

It operates with 22V reverse stand-off voltage (V_RWM), 25–27.9V breakdown (V_BR), and ultra-low dynamic resistance (20mΩ), enabling stable protection across −40°C to +125°C ambient without thermal derating of IPP capability.

Key Specifications

Parameter	Value and Actual Design Meaning
Working Voltage	22V V_RWM: defines maximum continuous DC operating voltage before leakage rises significantly.
Clamping Voltage	27.6–28V at 40A (8/20μs): ensures protected ICs (e.g., USB PD controllers) remain below damage threshold during worst-case surges.
Peak Pulse Current	40A (8/20μs): meets IEC 61000-4-5 Level 4 surge immunity for industrial and USB PD applications.
ESD Withstand	±30kV contact & air (IEC 61000-4-2): eliminates need for secondary ESD stages in high-reliability interfaces.
Dynamic Resistance	20mΩ: enables flat clamping curve and minimizes voltage overshoot during fast-rising transients.
Junction Capacitance	175pF @ 22V, 1MHz: low enough for 22V power rail protection without signal integrity impact.

Pinout & Package

TS4305BMSTRT is housed in a Pb-free, RoHS-compliant DFN-6 package measuring 1.6mm × 1.6mm × 0.55mm with exposed thermal pad not required - energy is dissipated within the FET structure. All six terminals must be connected per functional role to achieve rated 40A surge performance.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 3	GND	Common ground return path for surge current; all three pins must be tied to solid ground plane via multiple vias to minimize inductance.
4, 5, 6	IN	Protected line input (e.g., VBUS in USB PD); all three pins are internally paralleled and must be shorted externally for full 40A rating.

Key Features

Feature	Design Value
Constant-clamp architecture	Clamping voltage varies ≤0.4V from 24A to 40A - avoids overvoltage stress on downstream ICs under increasing surge severity.
Temperature-stable protection	Clamping remains 27.6–28V from −40°C to +125°C - eliminates thermal derating calculations required for standard TVS diodes.
Low dynamic resistance	20mΩ enables <1V overshoot during sub-10ns ESD events - critical for protecting sensitive USB PD controllers.
Single-line 22V protection	Optimized for one high-voltage rail (e.g., USB PD VBUS up to 20V nominal, 22V max) - no external bias or control needed.

Applications

USB Type-C Power Delivery	Industrial Load Switch Input Protection
Use Scenario: Protecting VBUS line in USB-C receptacles supporting up to 20V/5A PD negotiation. IC Role / Device Role / Timing Role: Primary EOS suppressor placed directly at connector, shunting lightning-induced surges and contact ESD before reaching PD controller. Use Value: Maintains 27.6V clamping at 40A and 125°C - stays 10V below typical PD controller absolute maximum ratings, eliminating risk of latch-up or gate oxide damage.	Use Scenario: Safeguarding input of industrial-grade load switches (e.g., HS2950P) in remote meters and robotics. IC Role / Device Role / Timing Role: Front-end transient clamp preventing overvoltage failure of internal MOSFETs during induced surges on long cables or ungrounded systems. Use Value: Limits voltage across load switch drain-source to ≤28V during 1.2/50μs + 8/20μs combination wave - avoids avalanche breakdown and permanent parametric shift.
IoT Edge Node Power Rails	Storage Device 22V Backup Supplies
Use Scenario: Securing 22V auxiliary power inputs in battery-backed smart sensors deployed outdoors or in factory environments. IC Role / Device Role / Timing Role: Standalone transient suppressor on main DC input, replacing multi-stage TVS+MOV solutions. Use Value: Delivers 1120W peak pulse power handling in 1.6×1.6mm footprint - reduces board area by >60% vs. discrete TVS+capacitor approaches.	Use Scenario: Protecting 22V supercapacitor or LiFePO₄ backup supplies in enterprise SSDs and NAS enclosures. IC Role / Device Role / Timing Role: Low-leakage (≤600nA @ 22V) protector preserving standby runtime while blocking 40A surges. Use Value: 130–600nA reverse leakage ensures <1μA total quiescent drain - critical for multi-year backup operation without self-discharge acceleration.

USB Type-C Power Delivery

Industrial Load Switch Input Protection

Use Scenario: Protecting VBUS line in USB-C receptacles supporting up to 20V/5A PD negotiation.

IC Role / Device Role / Timing Role: Primary EOS suppressor placed directly at connector, shunting lightning-induced surges and contact ESD before reaching PD controller.

Use Value: Maintains 27.6V clamping at 40A and 125°C - stays 10V below typical PD controller absolute maximum ratings, eliminating risk of latch-up or gate oxide damage.

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

IC Role / Device Role / Timing Role: Front-end transient clamp preventing overvoltage failure of internal MOSFETs during induced surges on long cables or ungrounded systems.

Use Value: Limits voltage across load switch drain-source to ≤28V during 1.2/50μs + 8/20μs combination wave - avoids avalanche breakdown and permanent parametric shift.

IoT Edge Node Power Rails

Storage Device 22V Backup Supplies

Use Scenario: Securing 22V auxiliary power inputs in battery-backed smart sensors deployed outdoors or in factory environments.

IC Role / Device Role / Timing Role: Standalone transient suppressor on main DC input, replacing multi-stage TVS+MOV solutions.

Use Value: Delivers 1120W peak pulse power handling in 1.6×1.6mm footprint - reduces board area by >60% vs. discrete TVS+capacitor approaches.

Use Scenario: Protecting 22V supercapacitor or LiFePO₄ backup supplies in enterprise SSDs and NAS enclosures.

IC Role / Device Role / Timing Role: Low-leakage (≤600nA @ 22V) protector preserving standby runtime while blocking 40A surges.

Use Value: 130–600nA reverse leakage ensures <1μA total quiescent drain - critical for multi-year backup operation without self-discharge acceleration.

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, same DFN-6 package, identical marking code T22 - confirmed pin-to-pin and functionally equivalent replacement.	No change in layout, BOM, or test plan required; fully interchangeable in all USB PD and industrial use cases.	Select TS4305BMSTRT when sourcing from Aetrix Electronics with traceable lot control and volume procurement support.
uClamp2411ZA	24V V_RWM, lower 24A IPP rating, higher 33V clamping at 24A - lacks constant-clamp FET architecture.	Suitable only for CC/SBU lines in USB-C; insufficient for 22V VBUS due to higher clamping and thermal drift.	Use uClamp2411ZA only for auxiliary signal lines where capacitance <0.5pF is prioritized over power-rail clamping precision.

Compared with TDS2211P, TS4305BMSTRT offers identical protection performance and drop-in compatibility, while uClamp2411ZA serves a different voltage class and lower-energy application - making TS4305BMSTRT the sole direct alternative for 22V high-current bus protection.

Availability

TS4305BMSTRT is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch protection, and IoT edge node power rails requiring stable component supply, full traceability, and lifecycle continuity management.

Supply support for TS4305BMSTRT 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 precision protection, sensing, and signal integrity.

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

FAQ

What is the maximum continuous operating voltage for TS4305BMSTRT?

The TS4305BMSTRT has a reverse stand-off voltage (V_RWM) of 22V, meaning it can safely operate continuously at DC voltages up to 22V without significant leakage or degradation. This makes TS4305BMSTRT ideal for USB PD VBUS lines with 20V nominal and 22V maximum ratings, ensuring reliable long-term performance without thermal runaway.

Does TS4305BMSTRT require an external bias or control signal to activate?

No, TS4305BMSTRT is fully autonomous - it contains an integrated precision trigger circuit and surge-rated FET that activates automatically when transient voltage exceeds its breakdown threshold. TS4305BMSTRT needs no external components, power, or configuration, simplifying design and reducing BOM count for 22V bus protection.

How does TS4305BMSTRT's clamping behavior differ from standard TVS diodes?

Unlike standard TVS diodes whose clamping voltage rises linearly with peak current (V_C = V_BR + I_PP × R_DYN), TS4305BMSTRT maintains near-constant clamping (~27.6–28V) from 24A to 40A due to its FET-based architecture and collapsing R_DS(on). This eliminates uncertainty in worst-case overvoltage margining for TS4305BMSTRT in industrial and USB PD designs.

Can TS4305BMSTRT be used on high-speed data lines like USB SS or PCIe?

No - TS4305BMSTRT has 175pF junction capacitance, optimized for 22V power rails, not signal integrity-critical data paths. For USB SuperSpeed or DP/DM lines, Semtech recommends low-capacitance devices like RClamp3371ZC (<0.25pF). TS4305BMSTRT is strictly intended for power or low-frequency I/O line protection.

What PCB layout practices maximize TS4305BMSTRT's surge performance?

To achieve rated 40A performance, place TS4305BMSTRT within 3mm of the protected connector, connect all three IN pins (4–6) with a single low-inductance trace, tie all three GND pins (1–3) directly to a solid ground plane using ≥4 vias, and avoid thermal pads - energy is dissipated internally. These steps ensure minimal parasitic inductance and full utilization of TS4305BMSTRT's constant-clamp capability.

TS4305BMSTRT Specifications

Product attributes: Attribute value

Manufacturer:: Semtech Corporation

Series:: -

Package/Case:: 8-SOIC (0.154", 3.90mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Discontinued at Digi-Key

Programmable:: Not Verified

Applications:: -

Voltage - Input:: -

Voltage - Supply:: -

Current - Supply:: -

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC

TS4305BMSTRT FAQ

1.How can I place an order for TS4305BMSTRT through Aetrix?

Please submit a Request for Quotation (RFQ) for TS4305BMSTRT 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 TS4305BMSTRT reliable?

The price and inventory of TS4305BMSTRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS4305BMSTRT is usually 5 days.

3.What payment methods are accepted for TS4305BMSTRT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS4305BMSTRT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TS4305BMSTRT?

TS4305BMSTRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TS4305BMSTRT 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 TS4305BMSTRT?

For technical support, including TS4305BMSTRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS4305BMSTRT requirements.

6.How does Aetrix verify that TS4305BMSTRT is sourced from the original manufacturer or authorized distributors?

All TS4305BMSTRT 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 TS4305BMSTRT meets industry standards.

7.What is the process for return or replacement of TS4305BMSTRT?

All TS4305BMSTRT units undergo pre-shipment inspection (PSI). If there is an issue with TS4305BMSTRT, 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 TS4305BMSTRT part is unused and in its original packaging.

Return procedure for TS4305BMSTRT:

1.Submit a request within 90 days.

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

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