TI Introduces 400mA Low-Power DC-DC Converter For Portable Designs
Texas Instruments Inc. (TI) introduced a space-saving, 400mA step-down converter for portable designs. The 95% efficient converter is said to extend battery life in mobile phones, portable navigation systems and low-power DSP and microcontroller applications.
TI claims that its TPS62270 synchronous dc-dc converter efficiently regulates output voltages down to 0.9V with +/-1.5% accuracy, enabling the device to power TI’s newest C5000 DSPs, low-power MSP430 microcontrollers and controllers with ultra-precise processor core supply requirements. The switcher’s voltage select (Vsel) pin is said to give designers the ability to switch between two fixed voltage levels to customize and cut power consumption in the processor core through dynamic voltage scaling.
The TPS62270 provides up to 400 mA of output current, and can be powered by a single-cell lithium-ion battery with an input voltage range of 2.0 to 6V. The converter automatically enters a power save mode during light load operating conditions, consuming only 15µA of quiescent current. For low-noise applications, the device can be forced into fixed frequency pulse width modulation (PWM) mode by pulling the MODE pin high. In the shutdown mode, the TPS62270’s current consumption is reduced to less than 1µA.
The new converter expands TI’s TPS622x family introduced in 2007. TPS62240 supports output currents up to 300mA; the TPS62260 supports up to 600mA; and the TPS62290 supports up to 1A. TI offers a full range of evaluation modules and application notes.
The TPS62270 comes in a 6-pin, 2 x 2 x 0.8mm SON package. Suggested retail pricing for the TPS62270 is $1.05 in 1,000-piece quantities.
