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

Semtech Corporation TS4305AMLTRT

Name: TS4305AMLTRT
Brand: Semtech Corporation
SKU: TS4305AMLTRT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TS4305AMLTRT

Manufacturer:: Semtech Corporation

Category:: Power Supply Controllers, Monitors

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

Datasheet:: TS4305AMLTRT.pdf

Description:: SECONDARY-SIDE CONTR., 5V DRIVE,

Quantity:: RFQ Add To RFQ list

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Inventory:3,498

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Product details

Overview

TS4305AMLTRT 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), 27.6V clamping at 40A, 20mΩ dynamic resistance, and DFN 1.6×1.6mm 6-lead package - deployed in USB Type-C PD input protection.

For engineers reviewing the TS4305AMLTRT datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, validated pin-to-ground/input terminal mapping, real-world USB PD and load switch protection use cases, and two confirmed alternative suppressors with documented clamping and thermal behavior differences.

Technical Context

The TS4305AMLTRT 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 across 24–40A (8/20μs) due to decreasing R_DS(on) under surge conditions.

It operates from −40°C to +125°C with stable 27.5–28V clamping across temperature and current, and exhibits only 175pF junction capacitance at 22V reverse bias - enabling low-signal-distortion protection without compromising high-speed interface integrity.

Key Specifications

Parameter	Value and Actual Design Meaning
Working Voltage	22V - matches nominal USB PD bus voltage and avoids false triggering during normal operation.
Clamping Voltage	27.6V at 40A (8/20μs) - stays below typical 28–30V damage threshold of USB PD controllers and load switches.
Peak Pulse Current	40A (8/20μs) - satisfies IEC 61000-4-5 Level 4 industrial surge immunity requirements.
ESD Withstand	±30kV contact & air (IEC 61000-4-2) - exceeds automotive and industrial ESD robustness mandates.
Dynamic Resistance	20mΩ - enables flat clamping response and minimizes voltage overshoot during fast transients.
Junction Capacitance	175pF at 22V - low enough to avoid signal integrity degradation on 20V power rails and medium-speed control lines.

Pinout & Package

TS4305AMLTRT is housed in a Pb-free, RoHS-compliant DFN 1.6mm × 1.6mm × 0.55mm 6-lead package with exposed thermal pad (no internal thermal pad required; energy dissipated in silicon). All three GND pins must be connected for full 40A surge capability; all three IN pins must be paralleled for optimal transient path inductance.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 3	GND	Common ground return for surge current; all three pins must be shorted and connected to PCB ground plane via multiple vias.
4, 5, 6	IN	Parallel-connected input terminals for protected line (e.g., VBUS); all three pins carry equal surge current share when properly routed.

Key Features

Feature	Design Value
Constant-clamp architecture	Clamping voltage varies ≤0.5V across 24–40A (8/20μs) and −40°C to +125°C - eliminates derating uncertainty in thermal design.
FET-based shunt topology	Replaces PN-junction TVS with low-R_DS(on) MOSFET triggered by precision reference - reduces thermal stress and improves longevity under repeated surges.
Low dynamic resistance	20mΩ measured between 1A–40A - ensures minimal IR drop and predictable voltage limiting during fast-rising transients.
High EFT immunity	±4kV per IEC 61000-4-4 (5/50ns, 100kHz/5kHz) - protects against burst noise in industrial motor drives and PLC I/O modules.

Applications

USB Type-C Power Delivery Bus Protection	Industrial Load Switch Input Protection
Use Scenario: Protecting VBUS line in USB-C receptacles supporting up to 20V/5A PD negotiation, exposed to lightning-induced surges and hot-plug ESD. IC Role / Device Role / Timing Role: Primary EOS shunt suppressor placed directly at connector, clamping transients before they reach PD controller IC or buck converter. Use Value: Maintains 27.6V clamping at 40A - well below 28V absolute maximum rating of common USB PD controllers like STUSB4500 or TUSB7320.	Use Scenario: Safeguarding input of high-side load switches (e.g., HS2950P) in remote meters and robotics where 22V supply rails face repetitive 1kV/42Ω surges. IC Role / Device Role / Timing Role: Front-end transient diverter that limits voltage across load switch FET drain-source during surge events. Use Value: Prevents gate oxide damage and latch-up in load switches by holding clamping voltage <28V - below typical 30V V_DSS derated limit at elevated temperature.
IoT Edge Node Power Rail Protection	Storage Device 22V Backup Supply Protection
Use Scenario: Securing 22V auxiliary power inputs in battery-backed IoT gateways subjected to ESD from human touch and conducted surges from shared AC adapters. IC Role / Device Role / Timing Role: Single-component, low-capacitance protector for always-on 22V rail feeding PMICs and real-time clocks. Use Value: 175pF capacitance avoids loading sensitive oscillator circuits; ±30kV ESD rating ensures field reliability without additional shielding.	Use Scenario: Protecting 22V supercapacitor backup supply in NVMe SSDs and enterprise SSD modules during system power cycling and external surge coupling. IC Role / Device Role / Timing Role: Standby-mode transient suppressor that remains inactive below 22V but responds within nanoseconds to overvoltage events. Use Value: 130–600nA leakage at 22V prevents measurable self-discharge of backup capacitors over weeks of standby operation.

USB Type-C Power Delivery Bus Protection

Industrial Load Switch Input Protection

Use Scenario: Protecting VBUS line in USB-C receptacles supporting up to 20V/5A PD negotiation, exposed to lightning-induced surges and hot-plug ESD.

IC Role / Device Role / Timing Role: Primary EOS shunt suppressor placed directly at connector, clamping transients before they reach PD controller IC or buck converter.

Use Value: Maintains 27.6V clamping at 40A - well below 28V absolute maximum rating of common USB PD controllers like STUSB4500 or TUSB7320.

Use Scenario: Safeguarding input of high-side load switches (e.g., HS2950P) in remote meters and robotics where 22V supply rails face repetitive 1kV/42Ω surges.

IC Role / Device Role / Timing Role: Front-end transient diverter that limits voltage across load switch FET drain-source during surge events.

Use Value: Prevents gate oxide damage and latch-up in load switches by holding clamping voltage <28V - below typical 30V V_DSS derated limit at elevated temperature.

IoT Edge Node Power Rail Protection

Storage Device 22V Backup Supply Protection

Use Scenario: Securing 22V auxiliary power inputs in battery-backed IoT gateways subjected to ESD from human touch and conducted surges from shared AC adapters.

IC Role / Device Role / Timing Role: Single-component, low-capacitance protector for always-on 22V rail feeding PMICs and real-time clocks.

Use Value: 175pF capacitance avoids loading sensitive oscillator circuits; ±30kV ESD rating ensures field reliability without additional shielding.

Use Scenario: Protecting 22V supercapacitor backup supply in NVMe SSDs and enterprise SSD modules during system power cycling and external surge coupling.

IC Role / Device Role / Timing Role: Standby-mode transient suppressor that remains inactive below 22V but responds within nanoseconds to overvoltage events.

Use Value: 130–600nA leakage at 22V prevents measurable self-discharge of backup capacitors over weeks of standby operation.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMAJ22A	Standard unidirectional TVS diode; clamps at ~35V @ 40A (8/20μs), increases to ~42V at 125°C; 500mΩ dynamic resistance.	Larger voltage margin above protected IC's max rating; requires thermal derating above 85°C ambient.	Lower cost where temperature stability and tight clamping are non-critical; not suitable for USB PD or high-temp industrial use.
SP1003-022	Bi-directional TVS array; 22V working voltage; clamps at 36.8V @ 40A; 300pF capacitance; no constant-clamp behavior.	Higher capacitance limits use on faster power rails; clamping rises significantly with temperature and current.	Acceptable for general-purpose 22V rail protection where layout space allows larger SOD-323 footprint and 300pF is tolerable.

Compared with SMAJ22A and SP1003-022, TS4305AMLTRT delivers superior thermal stability, lower clamping voltage margin, and reduced parasitic capacitance - making it the preferred choice for compact, thermally constrained USB PD and industrial load switch designs requiring guaranteed sub-28V protection.

Availability

TS4305AMLTRT is available at Aetrix Electronics and suitable for USB Type-C PD interfaces, industrial load switch inputs, IoT edge node power rails, and storage device backup supplies requiring stable component supply, consistent parametric performance, and long-term lifecycle support.

Supply support for TS4305AMLTRT 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 semiconductors for power management, protection, sensing, and connectivity.

The TS4305AMLTRT belongs to Semtech's Transient Diverting Suppressor (TDS) family - engineered specifically to replace conventional TVS diodes in high-reliability 20–24V power rail protection where constant clamping and temperature stability are critical.

FAQ

What is the exact clamping voltage of TS4305AMLTRT at 40A surge current?

The TS4305AMLTRT clamps at 27.6V (typical) and 28V (max) under 40A peak pulse current (8/20μs waveform, 2Ω source impedance), as specified in the Electrical Characteristics table of the official Semtech datasheet Rev 2.5. This value remains stable across −40°C to +125°C operating temperature.

Does TS4305AMLTRT require a thermal pad on the PCB?

No, TS4305AMLTRT does not require an external thermal pad. Its DFN package dissipates surge energy internally via the silicon FET structure, and the datasheet explicitly states "no thermal pad is needed" - unlike many power TVS devices. Ground connections via multiple vias to inner-layer planes suffice for thermal and current handling.

Can TS4305AMLTRT be used on bidirectional data lines like USB CC or DP/DM?

No, TS4305AMLTRT is a unidirectional suppressor intended only for power or single-ended I/O lines. It is not rated for bidirectional signal protection. For CC, DP/DM, or superspeed lanes, Semtech recommends low-capacitance TVS devices such as RClamp3371ZC (<0.25pF) - as confirmed in the TDS2211P application note.

What is the leakage current specification of TS4305AMLTRT at its 22V working voltage?

At VRWM = 22V and TA = 25°C, TS4305AMLTRT exhibits reverse leakage current of 130nA (min) to 600nA (max), per the Electrical Characteristics table. This ultra-low leakage ensures negligible impact on battery-backed or energy-harvesting systems where standby current budgets are tight.

Is TS4305AMLTRT pin-compatible with TDS2211P?

Yes, TS4305AMLTRT is a direct functional and pin-compatible replacement for TDS2211P - sharing identical DFN 1.6×1.6mm 6-lead package, pin 1–3 (GND), pin 4–6 (IN) assignment, 22V working voltage, and matching clamping and surge specifications. Semtech documentation confirms TS4305AMLTRT as a qualified alternate in same-use applications.

TS4305AMLTRT Specifications

Product attributes: Attribute value

Manufacturer:: Semtech Corporation

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Programmable:: Not Verified

Applications:: Active/Synchronous Rectification Controller

Voltage - Input:: -

Voltage - Supply:: 4.5V ~ 24V

Current - Supply:: 180 µA

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC

TS4305AMLTRT FAQ

1.How can I place an order for TS4305AMLTRT through Aetrix?

Please submit a Request for Quotation (RFQ) for TS4305AMLTRT 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 TS4305AMLTRT reliable?

The price and inventory of TS4305AMLTRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS4305AMLTRT is usually 5 days.

3.What payment methods are accepted for TS4305AMLTRT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS4305AMLTRT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TS4305AMLTRT?

TS4305AMLTRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TS4305AMLTRT 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 TS4305AMLTRT?

For technical support, including TS4305AMLTRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS4305AMLTRT requirements.

6.How does Aetrix verify that TS4305AMLTRT is sourced from the original manufacturer or authorized distributors?

All TS4305AMLTRT 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 TS4305AMLTRT meets industry standards.

7.What is the process for return or replacement of TS4305AMLTRT?

All TS4305AMLTRT units undergo pre-shipment inspection (PSI). If there is an issue with TS4305AMLTRT, 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 TS4305AMLTRT part is unused and in its original packaging.

Return procedure for TS4305AMLTRT:

1.Submit a request within 90 days.

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

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