TI’s Linear LED Driver Seeks Portable Products

Measuring just 1.2 mm x 1.2 mm in a CSP, the TPS75105 linear, quad-LDO with matching LED constant current source drives up to four LEDs in two banks with each LED at 25 mA maximum. Each bank features independent PWM brightness control for dimming levels from full brightness to off. The device provides regulated output current with 2% LED-to-LED matching. It exhibits a typical dropout voltage of 28 mV, which promises to extend the usable supply range in li-ion applications. The device does not employ internal switching signals, thereby eliminating EMI. Other features include over-current and over-temperature protection and default LED current to eliminate external components. The TPS75105 LED driver, as well as a TPS75103 version that supports 3 mA, are available now in 9-ball, 0.4-mm ball-pitch WCSPs. Price starts at $0.65 each/1,000. TEXAS INSTRUMENTS INC., Dallas, TX. (800) 477-8924.