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Load Switch IC TCK301G, TCK302G, TCK303G Application & Circuit

Main switch of a rapid-charging circuit

Main switch of a rapid-charging circuit Click to enlarge
(Click the image to see the enlarged image)

Vout and Iout waveforms

Vout and Iout waveforms Click to enlarge
(Click the image to see the enlarged image)


  • Operation and application of the slew rate control circuitry designed for inrush current limiting
  • Main switches of USB PD-enabled rapid-charging circuits for electronic devices with USB Type-C™ ports
  • Main switches of 5- to 12-V power supply input circuits that support various modes of rapid charging and wireless power transfer
  • Switches for the power management of systems requiring power-saving modes


  • Small package: 0.5 mm pitch WCSP9 ( 1.5 mm x 1.5 mm, t: 0.5 mm (Typ.)) , PD = 1.65 W
  • High input voltage: VIN (Max) = 28 V
  • High output current: IOUT (DC) = 3.0 A
  • Low ON resistance : RON = 73 mΩ (Typ.) at VIN = 4.5 V, IOUT = - 1.0 A
  • Inrush current reducing circuit ( slew rate control )
  • Over voltage lockout circuit : 6.6 V at 301G, 10.5 V at 302G, and 15.5 V at 303G (Typ.)
  • Under voltage lockout circuit: 2.9 V (Typ.)

Reference design files

Design, Document

“Design・Document” contains the documents listed below.

Circuit diagram


Reference guide

Design, File

“Design・File” contains the contents listed below.

Circuit schematic (OrCAD®)

Toshiba items

Toshiba items
Part Number Device Category Portion Usage Description
TCK30xG* Load Switch IC 1 VIN=2.3~28V/Inrush current reduction /Slew rate control/WCSP9
DF2S23P2CTC* TVS Diode 1 VESD ±30kV(max)/IPP=14A(max)/VBR=24.1V(typ)/CST2C

* : New product


Application Note

Application note
Name Outline Date of issue
Describes how to use 36V dual inputs- single output power Multiplexer IC, TCK32 series, that is ideal for mobile devices such as smartphones and tablet PCs. 9/2016


Name Outline Date of issue
Describes the lineups of Small Package(MOSFET/BJT/Diode/Linear IC/Logic/RF Device) 7/2019
Describes the lineups of TVS diode (ESD Protection diode)



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·Before creating and producing designs and using, customers must also refer to and comply with the latest versions of all relevant TOSHIBA information and the instructions for the application that Product will be used with or for.