TI Presents TPS721/722/793/794 LDO Regulators
Texas Instruments Inc. (TI, Dallas, TX) introduced a new portable power supply solution using low-dropout (LDO) regulators capable of taking inputs directly from two AAA batteries. The new TPS721xx and TPS722xx LDO regulators achieve low dropout on a small
die, extending battery life and saving board space in hand-held systems.
The TPS793xx and TPS794xx LDOs use TI's
proprietary process to save space and achieve extremely low dropout and low noise in several critical areas for mobile wireless systems. The new 1.8V input LDOs will make system design with off-the-shelf batteries easier, more efficient and less expensive for personal digital assistants (PDAs), digital cameras, Internet audio players and a variety of other hand-held applications, according to TI.
"The announcement of these new power supplies shows that TI is taking the lead in introducing LDOs for emerging markets in battery-powered applications," said Siamak Bastami, product manager. "These devices will
help simplify design, lower component counts, save board space and reduce costs in portable systems, thus helping to extend mobility for a wide range of applications."
The TPS721xx and TPS722xx LDOs accept input voltages ranging from 1.8V to 5.5V. The TPS721xx outputs 150mA of current and the TPS722xx outputs 50mA, which provides the capability to power up a high-performance, low-voltage, digital core directly from AAA
batteries. These devices are available in 1.5V, 1.6V and 1.8V fixed-output voltages and are adjustable over a range of 1.2V to 5.5V. Even with extremely low noise (30uVRMS), the devices are stable with just one low equivalent series resistance (ESR), 0.1µF ceramic output capacitor and PMOS topology, which enables extremely low quiescent current.
The TPS793xx and TPS794xx are available in 1.8V, 2.5V, 2.8V, 2.85V, 3.0V, 3.3V and 4.75V fixed-output voltages and are adjustable over a range of 1.2V to 5.5V. Suggested resale pricing per unit in quantities of 100,000 units is $0.42 for the TPS793xx and $0.45 for the TPS794xx.
Samples of the TPS721xx and TPS722xx are available now, with volume production scheduled for the fourth quarter of 2001. Planned pricing per unit in quantities of 100,000 units is $0.38 for the TPS721xx and $0.35 for the TPS722xx.
