Semtech Forges Highly Integrated, Efficient and Programmable Quad-Output Regulator IC.Business Editors/High-Tech Writers CAMARILLO, Calif.--(BUSINESS WIRE)--Feb. 19, 2003 Two Linear and Two Switching Controllers, All Programmable, Meet the Market's Need for Providing Multiple Low Output Voltages 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 leading supplier of analog and mixed-signal semiconductors for communications, portable devices, computers and industrial equipment, today announced a high-performance, programmable and efficient quad-output switching regulator well-suited to the power market's trend toward multiple outputs and lower voltages. Other benefits of the SC2453 include small size, cost-savings, wide input voltage range, high-current output and a rich array of features. Semtech's SC2453 device, packaged in a tiny TSSOP-28, combines two low-voltage dropout (1) On magnetic media, a bit that has lost its strength due to a surface defect or recording malfunction. If the bit is in an audio or video file, it might be detected by the error correction circuitry and either corrected or not, but if not, it is often not noticed by the human (LDO LDO Low-Dropout (Used With Regulators) LDO Limited Duty Officer LDO Light Diesel Oil (petroleum) LDO Local Development Officer (Nepal) LDO Land Development Ordinance ) regulators -- one positive and one negative -- and two highly efficient synchronous, voltage-mode, buck switching regulators. The SC2453's input voltage can range from 4.5V to 30V, thus encompassing 5V, 12V, and 24V power supply buses, or any bus within the 4.5V to 30V range. Significantly, the SC2453's output can go as low as 0.5V and supply up to 20A through external MOSFETs. The benefits of high integration extend beyond cutting the overall circuit size and cost by streamlining procurement and end-equipment manufacturing. Among the wide range of power-management applications that would benefit by using the SC2453 are cable, DSL DSL in full Digital Subscriber Line Broadband digital communications connection that operates over standard copper telephone wires. It requires a DSL modem, which splits transmissions into two frequency bands: the lower frequencies for voice (ordinary and ISDN modems and other customer premise equipment; wireless base stations and networks; set-top boxes; switching power supplies Switch´ing power supply n. 1. a device used as part of an electronic device, which transforms electrical current from an AC line circuit to DC for use in electronic devices, and which can use either 110 volt or 220 volt AC line curent. ; and broadband and wireless network devices. In general, the SC2453 lends itself to cost-sensitive, mixed-signal products needing both positive and negative voltages. "When it comes to highly integrated, multiple-output, low-voltage power supply regulators, the SC2453 is destined des·tine tr.v. des·tined, des·tin·ing, des·tines 1. To determine beforehand; preordain: a foolish scheme destined to fail; a film destined to become a classic. 2. to become an industry favorite," says George Georgalis, Semtech's Director of Networking & Industrial Power Management. "For those designers working on distributed power architectures, this device packs an impressive range of features." Other important features and benefits of the SC2453 include a programmable switching frequency of up to 700 kHz. The high frequency reduces the size and number of required capacitors and inductors. Additionally, the two switching regulators, designed to drive N-channel MOSFETs, are synchronized syn·chro·nize v. syn·chro·nized, syn·chro·niz·ing, syn·chro·niz·es v.intr. 1. To occur at the same time; be simultaneous. 2. To operate in unison. v.tr. 1. to avoid beat frequencies, while fixing the switching frequency to one value simplifies filtering and 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. suppression. Also, by switching 180-degrees out-of-phase with each other, the switching regulators reduce input ripple. Power-up sequencing avoids latch-up problems. For added efficiency, the SC2453 eliminates the need for a current sensing 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). . Still other features include overcurrent protection with adjustable current limit, fast transient response In electrical engineering and Mechanical Engineering, a transient response or natural response is the response of a system to a change from equilibrium. Specifically, transient response in Mechanical Engineering is the portion of the response that approaches zero after a , bootstrapping Bootstrapping A procedure used to calculate the zero coupon yield curve from market figures. Notes: Since the T-bills offered by the government are not available for every time period, the bootstrapping method is used to fill in the missing figures in order to derive the for high-side MOSFETs, soft-start operation and a "power good" output signal. Key Features of the SC2453 Quad-Output Regulator IC -- Two linear and two switching regulators -- Highly integrated, efficient and programmable -- 4.5 to 30V input range; output voltage as low as 0.5V -- Programmable switching frequency up to 700 kHz -- No current sensing resistor -- Power-up sequencing -- Fast Transient Response -- Overcurrent protection, soft start and power-good signal -- -40 to +105 degrees C operating range -- TSSOP-28 package Pricing and Availability Production volumes of the SC2453 High-Performance Quad-Output Switching regulator are available now through Semtech's authorized network of sales representatives and distributors. The product, which comes in a 28-pin TSSOP TSSOP Thin Shrink Small Outline Package TSSOP Thin Scale Small Outline Package , sells for $2.48 each in 1,000-unit quantities. Datasheets are available at www.semtech.com. About Semtech Semtech Corporation is a leading supplier of high-quality analog and mixed-signal semiconductor products. The company is dedicated to providing customers with proprietary solutions and breakthrough technology in power management, protection, advanced communications, human interface, test and measurement, and high-speed clock/logic products. Publicly traded since 1967, Semtech is listed on the NASDAQ National Market under the symbol SMTC. For more information, contact Semtech Corp. at 200 Flynn Road, Camarillo, CA 93012-8790; phone (805) 498-2111; email to info@semtech.com; or visit its Web site at www.semtech.com. |
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