10/7/2003 - Extending efforts to improve system run-times in application processor-powered and digital signal processing (DSP)-based portable devices, Texas Instruments Incorporated (TI) (NYSE: TXN) announced a family of 400-mA, synchronous DC/DC step-down converters with ultra-low quiescent current and up to 95 percent power efficiency. The new high performance power management converters are ideally suited for portable systems powered by single-cell lithium-ion (Li-Ion) or three-cell alkaline or nickel metal-hydride (NiMH) batteries.
The TPS6222x family of step-down converters supports an input voltage range from 2.5 V to 6 V, an output voltage range of 6 V down to 0.7 V and output current up to 400 mA, which can support personal digital assistants (PDAs), smartphones and wireless LAN applications. The converters operate with a fixed switching frequency of 1.25 MHz (typical). To provide additional power savings, the TPS6222x enters a "power save mode" operation at light load currents. In this mode the switching frequency is reduced and quiescent current is typically only 15 uA, resulting in the highest efficiency over the entire load current range. Additionally, an advanced fast response voltage mode control scheme achieves excellent line and load regulation with small ceramic input and output capacitors.
Pricing and Availability
The TPS6222x step-down DC/DC converters are available today in volume from TI and its authorized distributors. Suggested resale pricing for the devices, which come in a five-pin ThinSOT-23 package, are $1.49 each in quantities of 1,000. Evaluation modules of the TPS6222x are available in less than 24 hours through power.ti.com
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