Toshiba Semiconductor and Storage TCKE800NL,RF

Overview

TCKE800NL,RF from Toshiba Electronic Devices & Storage Corporation is an 18 V, 5 A eFuse IC with latched fault response, reverse current blocking control, and adjustable overcurrent protection via external resistor. It integrates a 28 mΩ (typ.) internal power MOSFET and supports programmable slew rate control for inrush current management. Designed for high-density power rail protection in HDD power supplies and battery charging circuits.

For engineers reviewing the TCKE800NL,RF datasheet, TCKE800NL,RF pinout, TCKE800NL,RF application, or TCKE800NL,RF equivalent, this page delivers verified functional identity, confirmed WSON10B package mapping, validated terminal roles, real-world timing behavior (tOFF = 0.5 μs), and two rigorously cross-checked alternative parts for latched eFuse applications.

Technical Context

The TCKE800NL,RF implements a single-input/single-output eFuse architecture with integrated gate driver for external N-channel MOSFET reverse-current blocking. Its EN/UVLO pin serves dual functions: enable control and programmable under-voltage lockout threshold via external resistor divider.

It features latched fault response-once triggered by overcurrent, short circuit, or thermal shutdown, output remains disabled until externally reset via EN/UVLO low-to-high transition. No overvoltage clamp is implemented (VOVC = N/A), distinguishing it from TCKE805/TCKE812 variants.

Key Specifications

Pinout & Package

Package: WSON10B (3.0 mm × 3.0 mm, 0.7 mm typical height, 0.5 mm pitch, exposed thermal pad).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TCKE800NL,RF, TPS259472LVR adds overvoltage protection but requires layout adaptation for its larger WQFN-20 package, while RT9711CGJ5 omits reverse-current blocking and UVLO tuning-making TCKE800NL,RF uniquely suited for compact, customizable, bidirectional power domains.

Availability

TCKE800NL,RF is available at Aetrix Electronics and suitable for hard disk drive power supplies, battery charging circuits, industrial PLC I/O modules, and embedded computing power rails requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for TCKE800NL,RF 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 ICs for industrial, storage, and consumer applications, with emphasis on safety, efficiency, and miniaturization.

The TCKE8xx series targets robust, space-constrained power rail protection-delivering configurable eFuse functionality in ultra-small WSON10B packages for HDD, portable power, and industrial control systems.

FAQ

What is the fault response behavior of the TCKE800NL,RF?

The TCKE800NL,RF uses latched fault response: upon overcurrent, short circuit, or thermal shutdown, the output disables and remains off until the EN/UVLO pin is actively toggled from low to high. This ensures deterministic fault containment and prevents uncontrolled auto-retry cycles that could stress downstream components. Unlike auto-retry variants (e.g., TCKE800NA), the TCKE800NL,RF requires explicit host intervention to restore power.

Does the TCKE800NL,RF include overvoltage protection?

No, the TCKE800NL,RF does not implement overvoltage clamp functionality. Per Toshiba's product list and electrical characteristics tables, VOVC is explicitly marked "N/A" for TCKE800-series devices. Overvoltage protection is only available in TCKE805 (6.04 V clamp) and TCKE812 (15.1 V clamp) variants. Designers requiring OVP must select one of those alternatives or add external clamping circuitry.

How is overcurrent limit set on the TCKE800NL,RF?

The TCKE800NL,RF overcurrent limit (ILIM) is set by connecting an external resistor (RILIM) between the ILIM pin and GND. Values from 20 kΩ to 250 kΩ program ILIM from 5.15 A down to 0.5 A, per the RILIM–ILIM lookup table in the datasheet. Open or 0 Ω connections yield a fixed 0.64 A limit. The relationship is monotonic but non-linear; actual ILIM must be verified on hardware due to ±15% tolerance at low currents.

Can the TCKE800NL,RF block reverse current without external components?

No-the TCKE800NL,RF requires an external N-channel MOSFET connected to the EFET pin to enable reverse current blocking. The EFET pin outputs a boosted gate drive (VIN + 4.9 V typ.) to turn on the external FET when the device is enabled. If reverse blocking is unused, the EFET pin must be left floating. The IC itself contains no internal back-to-back FETs or integrated blocking switches.

What package and thermal characteristics apply to the TCKE800NL,RF?

The TCKE800NL,RF is housed in a WSON10B package (3.0 mm × 3.0 mm, 0.5 mm pitch, 0.7 mm height) with an exposed thermal pad. At 5 A continuous load on a 4-layer FR4 board (76.2 mm × 114.3 mm), its power dissipation is ≤2.4 W, and junction temperature rises to 160°C before thermal shutdown activates. Proper soldering of the thermal pad to a large copper pour is essential to maintain reliability under full-load conditions.