Semtech Corporation SCPND15

Overview

TDS2211P from Semtech is a transient diverting suppressor designed for high-energy EOS protection of 22V-rated I/O or power lines, featuring ±30kV IEC 61000-4-2 ESD immunity, 40A (8/20μs) peak pulse current capability, 27.5–28V clamping voltage at 40A, and DFN 1.6×1.6mm 6-lead package - deployed in USB Type-C PD bus protection and industrial load switch input stages.

For engineers reviewing the TDS2211P datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage stability across temperature and current, low dynamic resistance (<20mΩ), junction capacitance (175pF), and validated performance in ±1kV IEC 61000-4-5 unsymmetrical surge testing with 42Ω source impedance.

Technical Context

The TDS2211P uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit when transient voltage exceeds breakdown threshold. Unlike conventional TVS diodes, it achieves near-constant clamping voltage due to decreasing R_DS(on) under increasing surge current.

Its functional architecture separates trigger sensing (V_BR ≈ 25–27.9V) from shunt conduction, enabling stable 27.5–28V clamping from −40°C to +125°C and across 24–40A peak pulse range - critical for USB PD and industrial equipment where thermal derating compromises traditional TVS performance.

Key Specifications

Pinout & Package

Package: DFN 1.6mm × 1.6mm × 0.55mm, 6-lead, Pb-free, RoHS/WEEE compliant, UL 94V-0 molding compound.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMAJ22A and TPD2E001DRYR, the TDS2211P uniquely delivers stable 28V clamping across full temperature and current range while supporting 40A surge - making it the sole option among the three qualified for industrial-grade 22V power rail EOS protection without thermal or current derating.

Availability

TDS2211P is available at Aetrix Electronics and suitable for USB Type-C PD interfaces, industrial load switch inputs, and IoT device power rails requiring stable component supply, long-term lifecycle support, and verified surge compliance.

Supply support for TDS2211P 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 TDS family was developed to replace conventional TVS diodes in high-reliability power rail protection, targeting applications where clamping voltage stability over temperature and current is non-negotiable - such as USB PD, industrial automation, and ruggedized IoT endpoints.

FAQ

What is the maximum continuous operating voltage for TDS2211P?

The TDS2211P has a reverse stand-off voltage (V_RWM) of 22V, meaning it can reliably block up to 22V DC or RMS voltage continuously without significant leakage. This makes it suitable for 20V USB PD V_BUS and 22V industrial power rails. Exceeding 22V risks premature conduction and accelerated degradation. The TDS2211P datasheet specifies 130–600nA leakage at 22V, confirming stable blocking behavior under nominal conditions.

How does TDS2211P achieve constant clamping voltage across varying surge currents?

The TDS2211P uses a surge-rated FET as its conduction element, controlled by an integrated trigger circuit. When a transient exceeds ~25V, the trigger activates the FET, whose R_DS(on) decreases under higher current - counteracting the I×R rise seen in TVS diodes. As a result, the TDS2211P maintains 27.5–28V clamping from 24A to 40A (8/20μs), unlike conventional TVS devices whose clamping rises linearly with current.

Can TDS2211P replace a standard TVS diode in a USB PD design without layout changes?

Yes - the TDS2211P uses the same DFN 1.6×1.6mm 6-lead footprint as many TVS diodes, but requires specific layout attention: all three IN pins (4–6) and all three GND pins (1–3) must be shorted together with low-inductance traces. Unlike two-terminal TVS devices, this 6-pin configuration demands symmetric routing to ensure equal current sharing. The TDS2211P datasheet provides exact land pattern dimensions to maintain surge performance.

Is TDS2211P compliant with IEC 61000-4-5 for industrial surge immunity?

Yes - the TDS2211P is rated for ±1kV (1.2/50μs voltage, 8/20μs current, R_S = 42Ω) on unsymmetrical lines and 40A (8/20μs) peak pulse current, meeting IEC 61000-4-5 Level 4 requirements for industrial environments. Its 1120W peak pulse power rating and stable clamping under these conditions are validated in the official Semtech TDS2211P datasheet Rev 2.5, confirming suitability for factory automation and metering applications.

What is the junction capacitance of TDS2211P, and how does it affect USB PD VBUS protection?

The TDS2211P exhibits 175pF junction capacitance at 22V and 1MHz, which is intentionally higher than signal-line protectors but appropriate for V_BUS protection where bandwidth is not constrained. This value introduces negligible impact on 20V DC power delivery or slow-rising fault detection, while enabling robust energy absorption. For comparison, the TDS2211P datasheet confirms no adverse effect on USB PD communication timing or voltage regulation loop stability.