Semtech Corporation LC01-6.T

Overview

LC01-6.T from Semtech is a transient diverting suppressor designed for high-energy EOS/ESD protection of 22V-rated I/O or power 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 Type-C power delivery buses, load switch inputs, and industrial I/O interfaces where stable clamping under temperature and current stress is critical.

For engineers reviewing the LC01-6.T datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, DFN-6 package layout guidance, real-world USB PD and load switch protection use cases, and two validated alternative surge protectors with documented functional trade-offs.

Technical Context

The LC01-6.T 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 up to 125°C, 175pF junction capacitance at 22V/1MHz, and <600nA reverse leakage at VRWM. Its six-terminal DFN package assigns Pins 1–3 exclusively to GND and Pins 4–6 exclusively to IN, requiring all three pins per side to be connected for full 40A rating.

Key Specifications

Pinout & Package

LC01-6.T is housed in a Pb-free, RoHS-compliant DFN package measuring 1.6mm × 1.6mm × 0.55mm with exposed thermal pad not required. All six terminals are surface-mount; no thermal pad connection needed as energy is dissipated in the FET channel.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMAJ22A and TPD2E007DRYR, LC01-6.T uniquely delivers 40A surge capability with sub-28V clamping across temperature - making it the sole option for robust 22V power rail protection in USB PD, industrial, and battery-critical IoT systems.

Availability

LC01-6.T is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial I/O modules, and IoT device power rail protection requiring stable component supply, long-term lifecycle support, and guaranteed surge performance consistency.

Supply support for LC01-6.T 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 protection, sensing, and connectivity.

LC01-6.T belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered specifically to replace conventional TVS diodes in high-reliability 20–24V power rail applications demanding flat clamping, wide temperature stability, and high surge endurance.

FAQ

What is the maximum continuous operating voltage for LC01-6.T?

The LC01-6.T has a reverse stand-off voltage (VRWM) of 22V, meaning it reliably blocks up to 22V DC without significant leakage. This makes LC01-6.T suitable for protecting 20V USB PD VBUS lines and 24V industrial power rails where nominal voltage stays within specification. Exceeding 22V risks increased leakage or premature triggering.

Does LC01-6.T require a thermal pad or heatsink on the PCB?

No, LC01-6.T does not require a thermal pad or external heatsink. Its FET-based architecture dissipates surge energy efficiently in the channel, and the DFN package is designed for direct copper connection without thermal enhancement. The datasheet explicitly states "no thermal pad is needed," and layout guidelines emphasize low-inductance GND vias instead of thermal relief.

Can LC01-6.T be used to protect high-speed data lines like USB 3.x or PCIe?

No, LC01-6.T is not intended for high-speed data line protection. With 175pF junction capacitance, it would severely degrade signal integrity on superspeed lanes. LC01-6.T is optimized for power rail and low-frequency I/O protection (e.g., VBUS, CC, SBU, load switch inputs). For data lines, Semtech recommends low-capacitance devices like RClamp3371ZC (<0.25pF).

How does LC01-6.T's clamping behavior differ from a standard TVS diode?

Unlike standard TVS diodes whose clamping voltage rises linearly with peak current (VC = VBR + IPP × RDYN), LC01-6.T maintains ~27.5–28V clamping from 24A to 40A due to its active FET shunt. Its dynamic resistance drops with current, yielding flat clamping across temperature - a key advantage for designs operating at elevated ambient temperatures where TVS performance degrades significantly.

Is LC01-6.T pin-compatible with other Semtech TDS devices like TDS2411P?

No, LC01-6.T is not pin-compatible with TDS2411P or other TDS variants. While all share the same 6-pin DFN footprint, TDS2411P is rated for 24V working voltage and different internal trigger thresholds. Pin assignment (GND on 1–3, IN on 4–6) is identical, but substituting without validation risks overvoltage failure or inadequate clamping - each TDS variant must be selected per system voltage and surge profile.