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Toshiba Introduces New Ultra-Low ON Resistance Load Switch ICs

July 15, 2014

Featuring Reverse Current Blocking and Thermal Shutdown Function


IRVINE, Calif., — Toshiba America Electronic Components, Inc. (TAEC)*, a committed leader that collaborates with technology companies to create breakthrough designs, today announced two new ultra-low ON resistance load switch ICs, the TCK111G and TCK112G, for power management in portable/mobile devices, such as smart phones, that require high-density board assembly.

The new load switch ICs offer reverse current blocking and a thermal shutdown function. In addition, they feature ultra-low switch ON resistance, low quiescent current and a wide input voltage operation from 1.1 V to 5.5 V. Switch ON resistance is only 8.3 mΩ at 5.0 V and -1.5 A for load conditions. The TCK111G and TCK112G also feature an inrush current suppressing slew rate control driver and output auto-discharge function (offered as an option on the TCK112G).

Available in a 0.5 mm pitch ultra-small package WCSP6C (1.0 mm x 1.5 mm, t: 0.5 mm (typ.)) the new devices from Toshiba are well-suited to smart phones but are also targeted to tablet PCs, portable audio players, digital cameras, camcorders, games and other small mobile devices.


  • Low ON resistance: RON = 8.3 mΩ (typ.) at VIN = 5.0 V, -1.5 A
    RON = 8.4 mΩ (typ.) at VIN = 3.3 V, -1.5 A
    RON = 8.4 mΩ (typ.) at VIN = 1.8 V, -1.5 A
    RON = 8.5 mΩ (typ.) at VIN = 1.1 V, -1.5 A
  • Wide input voltage operation: VIN = 1.1 to 5.5 V
  • Reverse current blocking
  • Inrush current reducing circuit
  • Thermal shutdown function
  • Built in auto-discharge (TCK112G)
  • Pull down connection between CONTROL and GND
  • Ultra-small package: WCSP6C (1.0 mm x 1.5 mm, t: 0.5 mm (typ.))

Function table

Part number Function
Inrush current limiter Reverse current blocking Thermal shutdown Output auto-discharge Control pin connection
TCK111G Built in Built in Built in N/A Pull down
TCK112G Built in Built in Built in Built in Pull down

Operation Logic table

1.1 V ≤ VIN ≤ 5.5 V (Ta = -40 to 85°C)


  TCK111G TCK112G
Control "High"
Output Q1 ON ON
Discharge Q2 - OFF
Reverse current block Active Active
Control "Low" Output Q1 OFF OFF
Discharge Q2 - ON
Reverse current block Active Active
Control "OPEN" Output Q1 OFF OFF
Discharge Q2 - ON
Reverse current block Active Active

Pricing and Availability

Toshiba's new ultra-low ON resistance load switch ICs are available now. Budgetary pricing is $0.20. Please contact your local Toshiba Sales Office for samples and pricing.

*About TAEC

Through proven commitment, lasting relationships and advanced, reliable electronic components, Toshiba enables its customers to create market-leading designs. Toshiba is the heartbeat within product breakthroughs from OEMs, ODMs, CMs, VARs, distributors and fabless chip companies worldwide. A committed electronic components leader, Toshiba designs and manufactures high-quality flash memory-based storage solutions, solid state drives (SSDs), hard disk drives (HDDs), solid state hybrid drives (SSHDs), discrete devices, custom SoCs/ASICs, imaging products, microcontrollers, wireless components, mobile peripheral devices, advanced materials and medical tubes that make possible today's leading smartphones, tablets, cameras, medical devices, automotive electronics, industrial applications, enterprise solutions and more.

Toshiba America Electronic Components, Inc. is an independent operating company owned by Toshiba America, Inc., a subsidiary of Toshiba Corporation, Japan's largest semiconductor manufacturer and the world's sixth largest semiconductor manufacturer (Gartner, 2013 Worldwide Semiconductor Revenue, December 2013). Founded in Tokyo in 1875, Toshiba is at the heart of a global network of over 590 consolidated companies employing over 200,000 people worldwide. Visit Toshiba's web site at

For additional company and product information, please visit

Information in this press release, including product pricing and specifications, content of services and contact information, is current and believed to be accurate on the date of the announcement, but is subject to change without prior notice. Technical and application information contained here is subject to the most recent applicable Toshiba product specifications.

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