Toshiba TCK12xBG 1A Load Switch ICs

Toshiba TCK12xBG 1A Load Switch ICs are designed for general power management with a slew rate control driver. The TCK12xBG ICs feature ultra-low quiescent current, low switch ON resistance, and a wide 1.0V to 5.5V input operation voltage range. Additionally, the devices provide a quiescent current of 0.08nA and an output current up to 1.0A.

The Toshiba TCK12xBG 1A Load Switch ICs are housed in a 0.35mm pitch ultra-small WCSP4G package (0.645mm x 0.645mm, t: 0.465mm max.) with backside coating that protects from external damage. The TCK12xBG ICs are ideal for portable applications that require high-density board assembly and ultra-low power consumption, such as wearables, smartphones, and IoT modules.


  • Wide input operation voltage range of VIN = 1.0V to 5.5V
  • Built-in slew rate control driver
  • High output current of IOUT = 1A
  • Ultra small Quiescent current at IQ = 0.08nA at VIN = 5.5V, VCT = 0V, IOUT =0mA
  • Built in slew rate control driver
  • Low ON resistance
    • RON = 58mΩ (typ.) at VIN = 3.3V, IOUT = -0.5A
  • Low standby current (OFF state) : IQ(OFF)+ISD(OFF)=13nA (typ.)
  • IN (OPR)= 1.0V to 5.5V
  • Built-in auto-discharge (TCK127BG)
  • Active low (TCK128BG), Active high (TCK126BG, TCK127BG)
  • WCSP4G Ultra small package with back side coating (0.645mm x 0.645mm, t: 0.465mm max.)

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