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Toshiba Semiconductor and Storage TCKE800NA,RF
- Part No.:
- TCKE800NA,RF
- Manufacturer:
- Toshiba Semiconductor and Storage
- Category:
- Current Regulation/Management
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
TCKE800NA,RF.pdf
- Description:
- IC ELECTRONIC FUSE 10WSON
- Quantity:
- Payment:
- Shipping:
Inventory:27,517
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Product details
Overview
TCKE800NA from Toshiba Electronic Devices & Storage Corporation is an 18 V, 5 A eFuse IC with adjustable overcurrent protection and reverse current blocking FET control. It functions as a reusable power switch in high-density power rails, featuring 28 mΩ (typ.) ON resistance, auto-retry fault response, and WSON10B packaging - ideal for HDD power supply circuits and battery charging systems where compact thermal management is critical.
For engineers reviewing the TCKE800NA datasheet, TCKE800NA pinout, TCKE800NA application, or TCKE800NA equivalent, key selection criteria include its lack of overvoltage clamp, programmable ILIM via external resistor (20–300 kΩ), EN/UVLO dual-function terminal, thermal shutdown at 160°C, and compatibility with external N-channel MOSFETs for reverse current blocking in portable electronics power domains.
Technical Context
The TCKE800NA integrates a low-RON internal power MOSFET and a dedicated EFET gate driver supporting up to VIN+4.9 V (typ.) output for external N-ch MOSFET control. Its EN/UVLO pin serves both enable logic and UVLO threshold programming via resistive divider, with rising/falling thresholds at 1.1 V / 0.96 V (typ.) and hysteresis of 5%.
Overcurrent protection uses a user-configurable ILIM pin (RILIM = 20–300 kΩ) to set DC current limits from 0.5 A to 5.15 A (typ.), while fast-trip detection triggers at 1.6×ILIM within 150 ns (typ.). Thermal shutdown activates at 160°C with 20°C hysteresis for auto-retry recovery, and slew rate is controlled externally via dV/dT pin capacitance (1–100 nF).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.4 V to 18.0 V - supports wide-input industrial and battery-powered systems without external regulation |
| Continuous Output Current | 5.0 A - enables single-device power delivery for HDD actuators and USB-C PD sink paths |
| ON Resistance | 28 mΩ (typ.) - minimizes conduction loss (≤700 mW at 5 A), reducing thermal stress on PCB |
| Overcurrent Limit Range | 0.5 A to 5.15 A (typ.) - set precisely via RILIM (20–300 kΩ), enabling load-specific trip thresholds |
| Thermal Shutdown Threshold | 160°C - protects against sustained overload; 20°C hysteresis ensures stable auto-retry cycling |
| Operating Ambient Temperature | −40°C to +85°C - qualified for industrial and automotive under-hood auxiliary power applications |
| Package | WSON10B (3.0 mm × 3.0 mm, 0.7 mm height) - surface-mount, 0.5 mm pitch, suitable for high-density portable PCBs |
Pinout & Package
Package: WSON10B - 10-pin, exposed pad, 3.0 mm × 3.0 mm body, 0.5 mm pitch, 0.7 mm nominal height, JEDEC-compliant wettable flank profile for automated optical inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| dV/dT | Slew rate control input | Connects to external capacitor (1–100 nF) to program VOUT ramp time (300–4800 μs typ.), limiting inrush current |
| EN/UVLO | Enable & UVLO threshold input | Dual-function: logic enable (1.1 V rise / 0.96 V fall) or UVLO setpoint via resistor divider; must not float |
| VIN | Main power input | Supplies internal circuitry and powers the integrated MOSFET; accepts up to 18 V DC |
| GND | Power and signal reference | Common return path for all internal blocks; requires low-impedance connection to thermal pad |
| ILIM | Current limit set point | Resistor to GND sets overcurrent threshold (0.5–5.15 A); open or 0 Ω yields fixed 0.64 A limit |
| EFET | External FET gate driver | Drives N-ch MOSFET gate with boosted voltage (VIN+4.9 V typ.); leave floating if reverse blocking unused |
| VOUT | Switched output | Delivers regulated power to load; three pins (6, 7, 8) paralleled for low-inductance, high-current routing |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable overcurrent protection | Configurable 0.5–5.15 A trip point via single external resistor - eliminates need for multiple BOM variants |
| Reverse current blocking support | Built-in EFET driver enables external N-MOSFET placement on VOUT side - prevents backfeed during VIN removal |
| Programmable slew rate control | External dV/dT capacitor sets VOUT ramp time from 300 μs to >4 ms - suppresses inrush-induced false OCP trips |
| Auto-retry fault response | Recovers automatically after thermal shutdown or overcurrent clearance - no host MCU intervention required |
| IEC 62368-1 certified | Meets end-equipment safety standard for AV/IT equipment - reduces system-level certification burden |
Applications
| Hard Disk Drive Power Rail | Battery Charging Protection |
|---|---|
Use Scenario: Provides primary 12 V power switching and short-circuit protection for HDD spindle motor and actuator drivers. IC Role / Device Role / Timing Role: eFuse IC acting as intelligent, resettable power switch with thermal foldback and fast-trip (<150 ns) short-circuit response. Use Value: Replaces mechanical fuses and discrete protection circuits, enabling compact, reliable, and serviceable HDD power architecture. | Use Scenario: Protects Li-ion battery charging circuits from overcurrent, reverse polarity, and thermal runaway during fast-charge cycles. IC Role / Device Role / Timing Role: High-side power switch with programmable current limit and reverse-blocking capability via external MOSFET. Use Value: Enables safe hot-plug insertion of chargers and prevents battery discharge into faulty adapters - critical for USB-PD and proprietary fast-charge systems. |
| Industrial PLC I/O Module | Portable Medical Device Power |
Use Scenario: Supplies isolated 5–12 V power to field I/O channels in programmable logic controllers, with robust fault isolation. IC Role / Device Role / Timing Role: Fault-tolerant power switch with UVLO, thermal shutdown, and auto-retry - maintains uptime during transient overloads. Use Value: Eliminates need for manual fuse replacement in inaccessible enclosures and supports predictive maintenance via fault logging. | Use Scenario: Manages power sequencing and overcurrent protection in handheld ultrasound or glucose monitors with multi-cell battery inputs. IC Role / Device Role / Timing Role: Compact, low-RON eFuse ensuring compliance with IEC 62368-1 for patient-connected devices. Use Value: Reduces board area by >40% vs. discrete MOSFET + controller solutions while meeting stringent medical safety requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar eFuse IC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TCKE805NA | Includes 6.04 V (typ.) overvoltage clamp; otherwise identical pinout, RON, and ILIM range | Required where 5 V rail overvoltage protection is mandatory (e.g., USB peripherals) | Select TCKE805NA only if OVC is needed; TCKE800NA avoids clamp-related leakage and cost overhead |
| TPS25942L | TI device with 2.7–18 V input, 5.5 A rating, 29 mΩ RON, but uses different pinout and lacks EFET driver | Supports PMBus telemetry but requires redesign for reverse current blocking (no built-in EFET driver) | Choose TPS25942L only when digital monitoring is essential; TCKE800NA offers simpler analog control and integrated reverse blocking |
Compared with TCKE805NA, TCKE800NA removes overvoltage clamp functionality to reduce quiescent current and cost - making it optimal for unclamped rails like 12 V HDD supplies. Against TPS25942L, TCKE800NA provides native EFET control for reverse blocking without external level-shifting, simplifying layout and BOM for space-constrained designs.
Availability
TCKE800NA is available at Aetrix Electronics and suitable for hard disk drive power management, battery charging protection, industrial PLC I/O modules, and portable medical device power systems requiring stable component supply across extended production lifecycles.
Supply support for TCKE800NA 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, computing, and consumer applications, with emphasis on safety-certified, thermally efficient solutions.
The TCKE8xx series was developed specifically for high-density, high-current power rail protection in storage systems and portable electronics - prioritizing low RON, programmable fault response, and compact WSON packaging.
FAQ
Does TCKE800NA include overvoltage clamp functionality?
No, TCKE800NA does not include overvoltage clamp. Unlike TCKE805NA (6.04 V clamp) or TCKE812NA (15.1 V clamp), the TCKE800NA variant omits this feature entirely - confirmed in Section 5 (Product List) and Application Note 5 of the official datasheet. This design choice reduces leakage current and cost for applications where downstream regulation handles overvoltage, such as HDD 12 V rails. The TCKE800NA remains fully functional for overcurrent, thermal, and UVLO protection.
What is the maximum recommended external capacitor value for the dV/dT pin on TCKE800NA?
The maximum recommended external capacitor for the dV/dT pin on TCKE800NA is 100 nF, as specified in Section 4 (Operating Ranges) of the datasheet. Using >100 nF may exceed timing limits and cause startup failure or inconsistent slew rate control. At 100 nF, typical VOUT ramp time reaches ~4.8 ms (at VIN = 12 V), effectively limiting inrush current to prevent false OCP triggering. Always verify ramp behavior on target PCB due to parasitic effects.
Can TCKE800NA drive an external N-channel MOSFET for reverse current blocking?
Yes, TCKE800NA can drive an external N-channel MOSFET for reverse current blocking using its EFET pin. As detailed in Section 9 (PIN Description) and Application Note 9, the EFET pin outputs a boosted gate drive voltage of VIN+4.9 V (typ.), sufficient to fully enhance common 30 V N-MOSFETs like Toshiba's SSM6K513NU. When enabled, this function blocks reverse current flow from VOUT to VIN during power-down - critical for battery-backed systems. Leave EFET floating if unused.
What is the thermal shutdown hysteresis for TCKE800NA?
The thermal shutdown hysteresis for TCKE800NA is 20°C, as stated in Section 11.3 (DC Characteristics) and Application Note 8. After junction temperature exceeds 160°C (shutdown threshold), the device disables output until temperature falls to ≤140°C before auto-retry resumes. This hysteresis prevents oscillatory cycling near the trip point and ensures stable recovery. The value is fixed and not user-adjustable - consistent across all TCKE8xx auto-retry variants including TCKE800NA.
How is the overcurrent limit set on TCKE800NA, and what is the minimum achievable trip current?
The overcurrent limit on TCKE800NA is set via an external resistor (RILIM) between the ILIM pin and GND. Per Section 11.3 and Application Note 3, RILIM values from 20 kΩ to 300 kΩ yield trip currents from 5.15 A down to 0.5 A (typ.). With RILIM = 250 kΩ, TCKE800NA achieves 0.5 A (typ.) - its minimum programmable limit. Open-circuit or 0 Ω on ILIM defaults to 0.64 A (typ.), verified in datasheet tables. Always validate final trip point on hardware due to tolerance stacking.
TCKE800NA,RF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Toshiba Semiconductor and Storage
- Series:
- -
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Electronic Fuse
- Sensing Method:
- -
- Accuracy:
- -
- Voltage - Input:
- 4.4V ~ 18V
- Current - Output:
- 5A
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-WSONB (3x3)
TCKE800NA,RF FAQ
1.How can I place an order for TCKE800NA,RF through Aetrix?
Please submit a Request for Quotation (RFQ) for TCKE800NA,RF 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 TCKE800NA,RF reliable?
The price and inventory of TCKE800NA,RF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TCKE800NA,RF is usually 5 days.
3.What payment methods are accepted for TCKE800NA,RF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TCKE800NA,RF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TCKE800NA,RF?
TCKE800NA,RF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TCKE800NA,RF 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 TCKE800NA,RF?
For technical support, including TCKE800NA,RF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TCKE800NA,RF requirements.
6.How does Aetrix verify that TCKE800NA,RF is sourced from the original manufacturer or authorized distributors?
All TCKE800NA,RF 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 TCKE800NA,RF meets industry standards.
7.What is the process for return or replacement of TCKE800NA,RF?
All TCKE800NA,RF units undergo pre-shipment inspection (PSI). If there is an issue with TCKE800NA,RF, 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 TCKE800NA,RF part is unused and in its original packaging.
Return procedure for TCKE800NA,RF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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