Sipex Corp. (Billerica, MA) announced the availability of its SP6641 PFM boost converter in a five-pin SOT-23 package, the latest product in its growing family of high-efficiency, low-voltage, dc-to-dc boost regulators used in single- and dual-cell alkaline, and lithium-ion portable powered systems where small size is critical.
The SP6641 is specifically designed for use in inexpensive, battery-powered, hand-held products such as digital still cameras, MP3 players, PDAs and pagers. A complete power supply for these products can be made using the SP6641 and only four external components: two capacitors, one inductor and a diode.
The SP6641 integrates a power device that can source up to 500mA (SP6641B) of current, and uses only 10uA of quiescent current. It provides three times better line rejection, four times better load rejection, as well as higher output accuracy over the industrial temperature range (-40 to 85 degrees C). The wide voltage input range is 0.9V to 4.5V, and the output range is factory preset for 3.3V (+/-4 percent). Designers can control the SP6641 via the shutdown pin.
"Customers desire small size, high performance, and low cost, which are all typically contradictory goals," said Todd Sherman, Sipex’s product line manager for power management. "The SP6641, offered in a tiny five-pin SOT-23 package, delivers up to 500mA of output current at high efficiency levels while consuming only 10uA of quiescent current."
The SP6641, packaged in a five-pin SOT-23, is offered at $0.86 in 10,000-piece quantities.
