Dual 200-mA LDOs for Portable Designs

13th April 2007

ES Admin

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Texas Instruments has introduced a family of dual, 200-mA low-dropout linear regulators (LDOs) in a 2 mm x 2 mm SON package for portable, battery-powered equipment. The low-noise LDOs provide high power-supply rejection ratio (PSRR) over a wide frequency range of up to 10-MHz, fast 160-µs start-up time and excellent line and load transient response, while consuming a very low total 90-µA ground current with both LDOs enabled.

TI's new TPS719xx LDOs feature an active shutdown circuit to quickly discharge capacitors at the output voltage. Discharging the capacitors to zero during shutdown helps to manage power-up when
sequencing applications. The TPS719xx devices are stable with ultra-small 1-µF ceramic capacitors, and leverage an advanced linear Bi-CMOS process technology to yield a typical dropout voltage of 230-mV
at 200-mA output loads. The LDOs also use a precision voltage reference and feedback loop to achieve a three percent overall accuracy over all load, line, process and temperature variations.

The devices come in a 6-pin, 2 mm x 2 mm, SON package, which is targeted at portable applications, such as mobile handsets, digital still cameras and wireless LAN applications that require good thermal
dissipation, while maintaining a small footprint.

The TPS719xx family of LDOs is available today in volume from TI and its authorized distributors. Suggested retail pricing in 1,000-piece quantities is $0.75.