Toshiba Semiconductor and Storage TCKE912NL,RF

Overview

TCKE912NL from Toshiba Electronic Devices & Storage Corporation is a 23 V input, 4 A latched eFuse IC with adjustable overcurrent protection (0.5–4.0 A), 13.7 V typical overvoltage clamp, and thermal shutdown-designed for high-reliability power rail protection in USB VBUS, storage power supplies, and battery charging circuits.

For engineers reviewing the TCKE912NL datasheet, TCKE912NL pinout, TCKE912NL application, or TCKE912NL equivalent, this page delivers verified specifications, WSON8 package details, fault response behavior (latched mode), slew rate control via external capacitor, and UVLO adjustment via resistor network-enabling accurate system-level protection design and BOM validation.

Technical Context

The TCKE912NL implements a single-channel, high-side MOSFET-based eFuse with integrated current sensing, fast-trip short-circuit detection (2.0 µs response), and precision overvoltage clamping at 13.7 V (±0.5 V). Its EN/UVLO pin serves dual functions: enable control and programmable under-voltage lockout threshold via external resistor divider.

It features latched fault response across all protection domains-overcurrent, short circuit, overvoltage, and thermal shutdown-requiring explicit EN/UVLO reset to resume operation. Slew rate is externally controlled via dV/dT pin capacitance (≥3300 pF), enabling inrush current management without compromising startup timing.

Key Specifications

Pinout & Package

Package: WSON8 (2.0 mm × 2.0 mm, 0.5 mm pitch, max height 0.8 mm), thermally enhanced with exposed pad tied to GND for stability and heat dissipation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TCKE912NL, TPS25947LMLR offers higher current but lacks latched operation and UVLO programmability, while MP5418GQZ matches latching and voltage range but sacrifices OVC accuracy and slew control-making TCKE912NL optimal for 12 V systems demanding precise, field-serviceable protection.

Availability

TCKE912NL is available at Aetrix Electronics and suitable for USB-C power delivery, NVMe SSD power sequencing, and battery charging applications requiring stable component supply, long-term lifecycle support, and automotive-grade reliability validation.

Supply support for TCKE912NL 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

Toshiba Electronic Devices & Storage Corporation designs high-reliability analog and power semiconductors for industrial, automotive, and computing markets, with ISO/TS 16949-certified manufacturing and global distribution.

The TCKE9 Series targets compact, high-density power protection in portable and embedded systems-delivering integrated eFuse functionality with programmable thresholds, latched safety response, and IEC 62368-1 compliance in sub-4 mm² WSON8 packages.

FAQ

What is the overvoltage clamp voltage of the TCKE912NL?

The TCKE912NL features a fixed overvoltage clamp threshold of 13.7 V (typical), with a guaranteed range of 13.2 V to 14.3 V across temperature. This value is specific to the TCKE912NL variant and is optimized for protecting 12 V nominal systems from transients without requiring external clamping components. The clamp activates within 6.0 µs at 4 A load current, ensuring rapid suppression of overvoltage events on the VOUT rail.

How does the latched fault response work in the TCKE912NL?

In the TCKE912NL, all fault conditions-including overcurrent, short circuit, overvoltage, and thermal shutdown-trigger a latched response: the device disables VOUT and holds FLAG low until the EN/UVLO pin is actively toggled from high to low and back to high. This prevents automatic restart during persistent faults, supporting fail-safe system behavior required in industrial and battery-powered applications. Unlike auto-retry variants, no internal timer resets the latch.

Can the overcurrent limit of the TCKE912NL be adjusted, and what is the supported range?

Yes, the TCKE912NL's overcurrent limit is fully adjustable from 0.5 A to 4.0 A using an external resistor (R_ILIM) between the ILIM pin and GND. Valid resistor values span 487 Ω to 5000 Ω, with 487 Ω yielding ~4.09 A (typical) and 5000 Ω yielding ~0.49 A (typical). The relationship follows R_ILIM = 1985/(I_LIM − 0.04), and the device disables output if ILIM is left floating or shorted to GND.

What package type and thermal requirements apply to the TCKE912NL?

The TCKE912NL uses the WSON8 package (2.0 mm × 2.0 mm, 0.5 mm pitch, max height 0.8 mm), featuring an exposed thermal pad that must be soldered to a PCB GND plane for both electrical stability and heat dissipation. At 4 A continuous load, its 34 mΩ R_ON generates ≤550 mW power loss; proper copper area under the pad ensures junction temperature remains within the −40 °C to +125 °C operating range without derating.

Does the TCKE912NL support adjustable slew rate control, and how is it implemented?

Yes, the TCKE912NL supports adjustable slew rate control via the dV/dT pin: connecting a capacitor (≥3300 pF) from dV/dT to GND sets the VOUT rise time, limiting inrush current during power-up. For example, 3300 pF yields ~11 V/ms slew rate at 20 V input, extending turn-on time to ~1.4 ms-sufficient to prevent false triggering of downstream overcurrent protection. Open-circuit dV/dT results in uncontrolled fast turn-on (~24 V/ms).