06th December 2006

TI Delivers Smallest Linear LED Driver for Portable Electronics

Texas Instruments introduced the smallest two-bank, low dropout (LDO) regulator to support LED lighting in portable applications, such as mobile phones, navigation systems, MP3 and media players. The device enables quality color backlighting from a tiny 1.2 x 1.2 mm package, allowing end- users to experience blinking and dimming of color keypads and navigation pad lights.

TI's TPS75105 linear, quad-LDO with matching LED constant current source drives up to four LEDs in two banks with each LED at 25 mA (max). Each bank features independent pulse width modulation (PWM) brightness control that controls the dimming level from "full brightness" to "off."

Key features include regulated output current with two percent LED-to-LED matching plus 28-mV typical dropout voltage extends usable supply range in Li-Ion battery applications.

It performas no internal switching signals, eliminating electromagnetic interface. Its over-current and over-temperature protection. The default LED current eliminates external components.

The TPS75105 LED driver, as well as a TPS75103 version that supports 3-mA, are available today in volume production from TI and its worldwide network of distributors. Both LED drivers come in an ultra-small, 9-ball,

0.4 mm ball- pitch wafer chip-scale package (WCSP). Suggested resale price starts at $0.65 in 1,000-unit quantities.

Evaluation modules, reference designs and application notes are available for download at: http://www.ti.com/portablepower