Low-dropout linear regulators in small packages

A family of dual, 200mA low-dropout linear regulators (LDOs) in a 2 x 2mm SON package is intended for use in portable, battery-powered equipment.

Texas Instruments has introduced a family of dual, 200mA low-dropout linear regulators (LDOs) in a 2 x 2mm 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 10MHz, with a fast 160us start-up time and good line and load transient response, while consuming a very low total 90uA ground current with both LDOs enabled.

TI's new TPS719xx LDOs have 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 1uF ceramic capacitors, and make use of an advanced linear Bi-CMOS process technology to yield a typical dropout voltage of 230mV at 200mA output loads.

The LDOs also use a precision voltage reference and feedback loop to achieve a 3% overall accuracy over all load, line, process and temperature variations.

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

The TPS719xx family of LDOs is available today in volume from TI and its authorised distributors.

Suggested retail pricing in 1,000-piece quantities is US $0.75.

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