New Industry Products

TI Introduces Small Integrated Load Switch To Reduce Design Time In Portable Applications

June 21, 2009 by Jeff Shepard

Texas Instruments Inc. (TI) introduced 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 ultra-small 0.8 x 0.8mm wafer chip scale package (WCSP) that is said to be ten times smaller than a conventional discrete solution and supports space-constrained applications, such as portable media players, cell phones and portable navigation systems.

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

Key features include: up to 2A maximum continuous switch current ultra-low ON resistance; low quiescent current of 82nA at 1.8V; low shutdown current of 44nA at 1.8V; ultra-small WCSP package (as small as 0.64 mm2); 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 78mΩ ON resistance in a four-terminal package (0.8 x 0.8mm) and are priced at $0.32. The TPS22903 has 66mΩ ON resistance in a four-terminal package (0.8 x 0.8mm) and is priced at $0.32. The TPS22906 has 90mΩ ON resistance in a four-terminal package (0.9 x 0.9mm) and is priced at $0.32. The TPS22921 and TPS22922 have 14mΩ ON resistance in a six-terminal package (1.2 x 0.8mm) and are priced at $0.42. All suggested resale pricing is in quantities of 1,000 units.