Semtech Introduces Capless Charge Pump for Space-Critical Applications.Business Editors & High-Tech Writers NEWBURY PARK, Calif.--(BUSINESS WIRE)--March 16, 2000 Semtech Corp. (Nasdaq:SMTC SMTC Southern Maine Technical College SMTC Science/Mathematics/Technology Center (Central Michigan University) SMTC Saluda Mountain Telephone Company (Knoxville, Tennessee) SMTC Short-To-Medium Term Control ), a leader in Power Management ICs, today announced availability of the SC1461, an 8 micro-amps charge pump A charge pump is an electronic circuit that uses capacitors as energy storage elements to create either a higher or lower voltage power source. Charge pump circuits are capable of high efficiencies, sometimes as high as 90-95% while being electrically simple circuits. featuring Semtech's proprietary Capless(TM) technology. Small surface mount packaging, combined with only two tiny external capacitors, makes this device ideal for applications where board space is at a premium, including cell phones, personal digital assistants (PDAs), notebook computers A laptop computer that weighs in a range from five to seven pounds. The term originated when laptops were routinely more than 10 pounds, and those that became lighter were placed in a special "notebook" category. In practice, notebook computer and laptop computer are synonymous. and peripheral card/PCMCIA supplies. The SC1461 is optimized for operation from either a 2.5V or 3.3V input, with user-selectable gain factors of 1.32Vin and 1.5Vin. This makes it ideal for systems that have a 2.5V rail and need a localized 3.3V power supply, or operate from a 3.3V rail and need a localized 5V power supply. The SC1461 also incorporates an adjust pin so designers can generate other gain factors using a simple resistor resistor, two-terminal electric circuit component that offers opposition to an electric current. Resistors are normally designed and operated so that, with varying levels of current, variations of their resistance values are negligible (see resistance). divider divider See European currency quotation. . Output current is rated at 8mA minimum. Charge pumps eliminate the inductor inductor, electric device consisting of one or more turns of wire and typically having two terminals. An inductor is usually connected into a circuit in order to raise the inductance to a desired value. used in switcher-based boost designs, which results in a reduction of total solution size, complexity and cost. EMI (ElectroMagnetic Interference) An electrical disturbance in a system due to natural phenomena, low-frequency waves from electromechanical devices or high-frequency waves (RFI) from chips and other electronic devices. Allowable limits are governed by the FCC. associated with inductors is also eliminated, an important factor in the design of wireless applications. The SC1461 takes cost and size reduction one step further by eliminating the external bucket or flying capacitor capacitor or condenser, device for the storage of electric charge. Simple capacitors consist of two plates made of an electrically conducting material (e.g., a metal) and separated by a nonconducting material or dielectric (e.g. typically used in charge pump designs. The high (12Mhz) operating frequency allows the bucket capacitor to be integrated on-chip, and allows smaller input and output capacitors to be used, resulting in an extremely compact, simple and cost-effective solution. A typical SC1461 application requires only two tiny surface mount ceramic capacitors, 0.22 micro-farad for the input and 47 micro-farad for the output. Other features of the SC1461 include 4 percent output voltage accuracy, low quiescent quiescent at rest; latent; the G0 stage of the cell cycle. current (50 micro-amps typical) and a low-power shut-down control. For designs requiring only 4 milli-amps of output current, Semtech also offers the SC1460 Capless(TM) charge pump. Pricing and Availability Samples of the SC1461 are available now in SOT-23, 5 lead packaging, with full production units available in April 2000. The SC1461 will be available through Semtech's network of direct-sales representatives and distributors, and is priced at 67 cents in 1,000- unit quantities. About Semtech Semtech is a leading supplier of high-quality analog and mixed-signal ICs for power management, overvoltage and transient protection, high-performance applications, and advanced communications. Publicly traded since 1967, Semtech is listed on the Nasdaq National Market under the symbol SMTC. For more information, contact Semtech Corp. at 652 Mitchell Road, Newbury Park, Calif. 91320; telephone 805/498-2111; e-mail to info@semtech.com; or visit its Web site at www.semtech.com. Note to Editors: Semtech and the Semtech logo are registered trademarks of Semtech Corp. |
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