Gate drivers support back-to-back MOSFETs
Toshiba Electronic Devices & Storage has added five products to its lineup of MOSFET gate drivers for mobile devices such as wearables.
The TCK42xG Series devices are equipped with an overvoltage lockout function and control the gate voltage of an external MOSFET according to the input voltage.
When combined with an external back-to-back MOSFET, they are also suitable for configuring a load switch circuit or a power multiplexer circuit with a reverse current blocking function.
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The new products are the TCK420G for 24V power lines; the TCK422G and TCK423G for 12V power lines; the TCK424G for 9V power lines; and the TCK425G for 5V power lines. Along with the TCK421G for 20V power lines, they are available now.
The TCK42xG series now allows users to select a gate-source voltage from two types, 10V and 5.6V, offering coverage of more MOSFETs. In addition, the lineup of the different detection voltages for the input overvoltage lockout function allows the products to be used for power lines from 5V to 24V.
A built-in charge pump circuit supports a wide range of input voltages, from 2.7V to 28V and provides stable voltage between the gate and source of an external back-to-back MOSFET with intermittent operation. This allows large currents to be switched.
The devices are housed in a 1.2 x 1.0mm WCSP6G package, one of the smallest in the industry, for high density mounting in small devices such as wearables and smartphones.
Toshiba has also developed Power multiplexer circuit Reference Design, a reference design example for a power multiplexer that uses the TCK42xG.
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