TI Introduces Smallest, Dual 200-MA LDOS For Portable Designs

Texas Instruments Incorporated (TI) (NYSE: TXN) today 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. See: www.ti.com/sc07076.

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.

Key Features of the TPS719xx Family:
Dual 200-mA LDO regulators
Available in multiple fixed-output voltage combinations from 0.9 V to 3.6 V, using factory EEPROM programming in steps of 50 mV
Low total quiescent current: 90 µA with both LDOs enabled
PSRR: 65 dB at 1 kHz, 45 dB at 1 MHz
Three percent accuracy over line, load and temperature
Active output pulldown
Independent Enable for each LDO
Low dropout: 230 mV at 200 mA
Fast start-up time: 160 µS


Pricing and Availability
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. Evaluation modules of the TPS719xx, design application notes and TI’s new Power Management Selection Guide are available through power.ti.com.