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Tiny load switches fit portable devices

Posted: 22 Jun 2009 ?? ?Print Version ?Bookmark and Share

Keywords:load switch? portable application? current?

TPS229xx load switch

Texas Instruments Inc. has rolled out a new family of integrated load switches with controlled turn-on and quick output discharge to simplify subsystem load management.

The TPS229xx family comes in an ultrasmall 0.8mm x 0.8mm WCSP that is 10x smaller than a conventional discrete solution and supports space-constrained applications, such as portable media players, cellphones and portable navigation systems.

According to TI, its new load switches have the lowest ON resistance to minimize dropout through the switch compared to competing solutions. In addition, the TPS229xx family has a low operating voltage range from 0.9V to 3.6V, which enables a variety of portable applications where low-voltage specifications are becoming more popular.

The new devices also feature 2A maximum continuous switch current, a low quiescent current of 82nA at 1.8V, a low shutdown current of 44nA at 1.8V and an integrated slew-rate control and quick output discharge options.

The TPS229xx family is available now in volume production in a WCSP package. The TPS22901 and TPS22902 have 78m? ON resistance in a four-terminal package (0.8mm x 0.8mm) and are priced at $0.32. The TPS22903 has 66m? ON resistance in a four-terminal package (0.8mm x 0.8mm) and is priced at $0.32. The TPS22906 has 90m? ON resistance in a four-terminal package (0.9mm x 0.9mm) and is priced at $0.32. The TPS22921 and TPS22922 have 14m? ON resistance in a six-terminal package (1.2mm x 0.8mm) and are priced at $0.42. All suggested resale pricing is in quantities of 1,000 units.

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