Toshiba Launches Small-Package eFuse IC Supporting 1.7V Low-Voltage Operation
Released on: Tuesday, 13 Oct 2026 11:44AM
Toshiba: TCKE5 Series of small-package eFuse ICs supporting 1.7V low-voltage operation.
KAWASAKI, Japan, Oct 13 (Bernama-BUSINESS WIRE) -- Toshiba Electronic Devices & Storage Corporation (“Toshiba”) has launched a lineup of four electronic fuses (eFuse ICs), the TCKE5 Series, that integrate multiple functions for the protection of power supply lines. Shipments start today. The new products operate over an input voltage range of 1.7V to 5.5V and are housed in the small SOT-353F (UFV) package. The lineup consists of four products, “TCKE501UA,” “TCKE501UL,” “TCKE502UA,” and “TCKE502UL.”
This press release features multimedia. View the full release here:
https://www.businesswire.com/news/home/20261012204269/en/
The miniaturization, enhanced functionality, and lower power consumption of electronic equipment have increased the use of applications that require low-voltage power supplies, including 1.8V power lines. To improve system reliability, protection functions against overcurrent and short-circuit conditions are also required for low-voltage power lines.
TCKE5 Series products feature an operating input voltage range of 1.7V to 5.5V and are the first products in Toshiba's eFuse IC lineup to support 1.8V power lines. This makes them suitable for low-voltage applications, including SD memory cards.
The series is available in the small, low-profile SOT-353F (UFV) package, which helps reduce PCB mounting area and contributes to space-saving and high-density designs for products such as wearable and IoT devices.
In addition to the short-circuit protection provided by physical fuses, such as glass tube fuses and chip current fuses, the TCKE5 Series incorporates overcurrent protection that shuts off output when overcurrent is detected. The overcurrent detection threshold (IOCP) can be set using an external resistor (RILIM), enabling protection levels to be configured to meet system requirements. Overcurrent protection also includes a mask time[1] that helps prevent unnecessary shutdowns caused by transient peak currents. These features help protect downstream circuits and contribute to improved system safety and reliability.
The product lineup includes both an auto-retry type, where the eFuse IC automatically recovers circuit operation, and a latch type, where recovery is triggered by an external signal, and customers can select the appropriate product for their system configuration. The series also offers products with different slew-rate settings, and customers can choose a device that meets their power sequencing requirements.
Toshiba will further expand its eFuse IC lineup with products that support a wide range of equipment.
Note:
[1] When a current exceeding the overcurrent detection threshold IOCP flows, the output is shut off after the mask time tOCP.
Applications
TCKE5 Series products feature an operating input voltage range of 1.7V to 5.5V and are the first products in Toshiba's eFuse IC lineup to support 1.8V power lines. This makes them suitable for low-voltage applications, including SD memory cards.
The series is available in the small, low-profile SOT-353F (UFV) package, which helps reduce PCB mounting area and contributes to space-saving and high-density designs for products such as wearable and IoT devices.
In addition to the short-circuit protection provided by physical fuses, such as glass tube fuses and chip current fuses, the TCKE5 Series incorporates overcurrent protection that shuts off output when overcurrent is detected. The overcurrent detection threshold (IOCP) can be set using an external resistor (RILIM), enabling protection levels to be configured to meet system requirements. Overcurrent protection also includes a mask time[1] that helps prevent unnecessary shutdowns caused by transient peak currents. These features help protect downstream circuits and contribute to improved system safety and reliability.
The product lineup includes both an auto-retry type, where the eFuse IC automatically recovers circuit operation, and a latch type, where recovery is triggered by an external signal, and customers can select the appropriate product for their system configuration. The series also offers products with different slew-rate settings, and customers can choose a device that meets their power sequencing requirements.
Toshiba will further expand its eFuse IC lineup with products that support a wide range of equipment.
Note:
[1] When a current exceeding the overcurrent detection threshold IOCP flows, the output is shut off after the mask time tOCP.
Applications
- Protection of power supply circuits in USB devices, HDMI® devices, laptop PCs and gaming consoles.
Features
- Input voltage operating range: 1.7V to 5.5V, supporting 1.8V, 3.3V, and 5V power lines
- Overcurrent protection mask time: tOCP = 2.4ms (typ.)
- Thin and compact SOT-353F package: 2.0×2.1×0.7mm (typ.)
Main Specifications
| (Unless otherwise specified, VIN=3.3V, RILIM=13.3kΩ, RLOAD=100Ω, CIN=COUT=1μF, Ta=25°C) | |||||||||
| Part number | TCKE501UA | TCKE501UL | TCKE502UA | TCKE502UL | |||||
| Fault response | Auto-retry | Latched | Auto-retry | Latched | |||||
| Absolute maximum rating | Input voltage VIN (V) | -0.3 to 6.0 | |||||||
| Operating range | Input voltage VIN (V) | 1.7 to 5.5[2] | |||||||
| Operating junction temperature Tj_opr (°C) | -40 to 125 | ||||||||
| Output current IOUT (A) | DC | 0 to 1.0 | |||||||
| Pulse | 0 to 2.0[3] | ||||||||
| Electrical characteristics | On-resistance[4] RON (mΩ) | VIN= 1.7 to 5.5V, IOUT=1.0A | Typ. | 75 | |||||
| Max | 100 | ||||||||
| Overcurrent protection threshold[4] IOCP (A) | RILIM＝ 6.8kΩ, Ta=-40 to 125°C | Min | 0.88 | ||||||
| Max | 1.12 | ||||||||
| Overcurrent Protection mask time[5] tOCP (ms) | IOUT= 0 to 1.5A | Typ. | 2.4 | ||||||
| Fast trip comparator level[5] ISHORT (A) | Typ. | 2.8 | |||||||
| Short circuit response time[5] tSHORT(µs) | IOUT>ISHORT→IOUT＝０A | Typ. | 1.3 | ||||||
| Switching characteristics[5] | Turn on rise time tR(µs) | VIN=1.8V | Typ. | 400 | 750 | ||||
| VIN=3.3V | Typ. | 600 | 1150 | ||||||
| VIN= 5.0V | Typ. | 800 | 1450 | ||||||
| Package | Name | SOT-353F (UFV) | |||||||
| Size (mm) | Typ. | 2.0×2.1×0.7 | |||||||
| Sample check & availability | Buy Online | Buy Online | Buy Online | Buy Online | |||||
Notes:
[2] Section 16 of the datasheets details precautions to be taken when using the product.
[3] 500μs pulse, duty ratio 2%.
[4] Pulsed testing techniques used during this test maintain a junction temperature approximately equal to ambient temperature.
[5] This parameter is for reference only.
Follow the links below for more on the new products.
TCKE501UA
TCKE501UL
TCKE502UA
TCKE502UL
Follow the link below for more on Toshiba eFuse ICs.
eFuse IC
To check availability of the new products at online distributors, visit:
TCKE501UA
Buy Online
TCKE501UL
Buy Online
TCKE502UA
Buy Online
TCKE502UL
Buy Online
* The terms HDMI, HDMI High-Definition Multimedia Interface, HDMI Trade dress and the HDMI Logos are trademarks or registered trademarks of HDMI Licensing Administrator, Inc.
* Other company names, product names, and service names may be trademarks of their respective companies.
* Information in this document, including product prices and specifications, content of services and contact information, is current on the date of the announcement but is subject to change without prior notice.
About Toshiba Electronic Devices & Storage Corporation
Toshiba Electronic Devices & Storage Corporation, a leading supplier of advanced semiconductor and storage solutions, draws on over half a century of experience and innovation to offer customers and business partners outstanding discrete semiconductors, system LSIs and HDD products.
Its 17,400 employees around the world share a determination to maximize product value, and to promote close collaboration with customers in the co-creation of value and new markets. The company looks forward to building and to contributing to a better future for people everywhere.
Find out more at https://toshiba.semicon-storage.com/ap-en/top.html
View source version on businesswire.com:
https://www.businesswire.com/news/home/20261012204269/en/
Contact
Customer Inquiries:
Analog Device Sales & Marketing Dept.
Tel: +81-44-548-2219
Contact Us
Media Inquiries:
C. Nagasawa
Communications & Market Intelligence Dept.
Toshiba Electronic Devices & Storage Corporation
semicon-NR-mailbox@ml.toshiba.co.jp
Source : Toshiba Electronic Devices & Storage Corporation
--BERNAMA
[2] Section 16 of the datasheets details precautions to be taken when using the product.
[3] 500μs pulse, duty ratio 2%.
[4] Pulsed testing techniques used during this test maintain a junction temperature approximately equal to ambient temperature.
[5] This parameter is for reference only.
Follow the links below for more on the new products.
TCKE501UA
TCKE501UL
TCKE502UA
TCKE502UL
Follow the link below for more on Toshiba eFuse ICs.
eFuse IC
To check availability of the new products at online distributors, visit:
TCKE501UA
Buy Online
TCKE501UL
Buy Online
TCKE502UA
Buy Online
TCKE502UL
Buy Online
* The terms HDMI, HDMI High-Definition Multimedia Interface, HDMI Trade dress and the HDMI Logos are trademarks or registered trademarks of HDMI Licensing Administrator, Inc.
* Other company names, product names, and service names may be trademarks of their respective companies.
* Information in this document, including product prices and specifications, content of services and contact information, is current on the date of the announcement but is subject to change without prior notice.
About Toshiba Electronic Devices & Storage Corporation
Toshiba Electronic Devices & Storage Corporation, a leading supplier of advanced semiconductor and storage solutions, draws on over half a century of experience and innovation to offer customers and business partners outstanding discrete semiconductors, system LSIs and HDD products.
Its 17,400 employees around the world share a determination to maximize product value, and to promote close collaboration with customers in the co-creation of value and new markets. The company looks forward to building and to contributing to a better future for people everywhere.
Find out more at https://toshiba.semicon-storage.com/ap-en/top.html
View source version on businesswire.com:
https://www.businesswire.com/news/home/20261012204269/en/
Contact
Customer Inquiries:
Analog Device Sales & Marketing Dept.
Tel: +81-44-548-2219
Contact Us
Media Inquiries:
C. Nagasawa
Communications & Market Intelligence Dept.
Toshiba Electronic Devices & Storage Corporation
semicon-NR-mailbox@ml.toshiba.co.jp
Source : Toshiba Electronic Devices & Storage Corporation
--BERNAMA