Semtech Introduces Capless Charge Pump for Space-Critical Applications
NEWBURY PARK, Calif.--(BUSINESS WIRE)--March 17, 2000--Semtech Corp. (Nasdaq:SMTC), a leader in Power Management ICs, today announced availability of the SC1461, an 8 milli-amps charge pump 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 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 divider. Output current is rated at 8mA minimum.
Charge pumps eliminate the inductor used in switcher-based boost designs, which results in a reduction of total solution size, complexity and cost. EMI 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 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 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 $0.67 in 1,000-unit quantities.
About Semtech
Semtech Corp. is a leading supplier of high-quality analog and mixed-signal ICs for power management, over-voltage 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; phone 805/498-2111; e-mail 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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CONTACT:
Semtech Corp., Newbury Park
Lori Posey, 805/480-2052
lposey@semtech.com |
