Sipex (Billerica, MA) has announced the availability of its SP6644/45 single- and dual-cell PFM boost converters, designed to provide an optimal power management solution for alkaline battery-powered hand-held devices.
Sipex claims that the SP6644/45 integrates the power devices and synchronous rectifying diode, providing two times more output current, three times better line rejection and four times better load rejection than existing solutions. In addition, the company maintains that the SP6644/45 has a higher output accuracy over the industrial temperature range, -40 C to 85 C.
The SP6644/45 has an efficiency of 92 percent. Its voltage input range is 0.2V to 3.3V, and the output range can be adjusted from 2V to 5.5V with two external resistors. The device sources up to 150mA with input as low as 2.6V. It provides a battery-low signal for inputs less than 1V, in the case of the SP6644, and, in the case of the SP6645, for inputs less than 2V. Designers can also control the SP6644/45 device via the shutdown pin. In shutdown, the IC draws a quiescent current of 1nA.
“The SP6644/45 was designed with an understanding of our customers' needs for a small, low-cost, accurate and reuseable solution," said Todd Sherman, Sipex's product line manager for power management. “The SP6644/45's high-efficiency, single IC solution delivers up to 150mA, which is especially ideal for digital cameras."
The SP6644/45 is currently offered in an 8-pin MSOP/8-lead SOIC package. Pricing starts at $1.05 in 10,000-piece quantities.
