Voltage Regulators help maximize battery life.
Press Release Summary:
Supplied in TO-220 SIP packaging, step-down Series 78SR is pin- and size-compatible with LM78xx devices. Three models offer outputs of +5 V/0.5 A, +12 V/0.4 A, and +3.3 V/0.5 A. Switching frequency of 260 kHz produces efficiencies as high as 95% for 12 V part and 85% for 3.3 and 5 V regulators. Offering full load operation from 9, 12, 24, 28, or 36 V supplies, at ambient temperatures as high as 70°C, units require no heats sinks, forced air cooling, or temperature derating.
Original Press Release:
APEC 2005 Subminiature Step-Down Voltage Regulators Offer Drop In Replacement For Significantly Reduced Power Consumption Without Circuit Re-Design
High-efficiency, low-profile 3.3V, 5V and 12V regulators in
TO-220 SIP packages are pin- and size-compatible with popular LM78xx devices
March 7, 2005, Austin, Texas - The power electronics division of C&D Technologies (NYSE: CHP), has announced three new high-efficiency step-down voltage regulators that are pin- and size-compatible with older and less efficient LM78xx devices. Supplied in industry standard TO-220 SIP packaging, the new 78SR regulators can be used as 'drop-in' replacements that allow engineers to reduce the power consumption of applications without costly or time-consuming circuit re-design. As a result, the devices can be used to increase battery life in portable instrumentation and standby power applications.
The 78SR switching regulators are ideal for new and existing LM7805/LM7812 designs and other applications where maximum load current is 0.5A or less and full load operation at elevated supply voltages is needed. Output options are +5V/0.5A (7805SR), +12V/0.4A (7812SR) and +3.3V/0.5A (7803SR). A 260kHz switching frequency produces efficiencies as high as 95% for the 12V part and 85% for the 3.3V and 5V regulators. Full load operation from 9V, 12V, 24V, 28V or 36V supplies - at ambient temperatures as high as 70°C - requires no heat sinks, no forced air cooling, and no temperature derating.
In addition to higher operating efficiencies, the new step-down voltage regulators offer other improvements over their linear counterparts. These include a lower quiescent current of 3mA (versus 5mA), a higher operating input voltage of 36V (versus 32V), and a significantly tighter output accuracy of ±1.5% (versus 5%). Excellent line and load regulation of ±0.3% and ±0.2% respectively allow operation from poorly regulated DC supplies. In addition, unlike their linear counterparts, 78SR regulators do not require external input or output capacitors to provide stable, low-noise outputs.
The 78SR regulators are available in two package styles: a standard vertical-mount SIP that occupies less than 0.1 square inch (645 square mm) and a horizontal-mount version that allows for an installed height of less than 0.35 inches (8.9mm).
Unit pricing for the C&D Technologies 78SR series is $4.95 in OEM quantities.
C&D Technologies, Inc. is a technology company that produces and markets systems for the conversion and storage of electrical power, including telecom/industrial batteries, rectifiers and electronics. This specialized focus has established the company as a leading and valued supplier of products in two major categories - reserve power systems and electronic power supplies. Corporate headquarters are in Blue Bell, Pennsylvania, USA and the company is traded on the NYSE under the symbol 'CHP'.
The Power Electronics Division of C&D Technologies, Inc. has its headquarters in Tucson, Arizona, USA, with manufacturing in the USA, Mexico, UK and China plus sales locations in the USA, UK, France, Germany, China and Japan. The division designs, manufactures and distributes DC/DC converters, AC/DC power supplies and magnetics, and offers these products in custom, standard and modified-standard variations. These products, which are built to exacting requirements in ISO9000:2000-approved facilities, are typically used worldwide by Original Equipment Manufacturers (OEMs) within telecommunications, computing, industrial and other high-tech applications.
In 2004 the product portfolio as well as the global design and manufacturing capabilities of the Power Electronics Division were significantly enhanced as a result of three acquisitions. In May 2004, C&D acquired UK-based Celab Limited, a designer and manufacturer of power conversion products for military, cable television and high-end telecommunications applications. In June 2004, the company acquired Datel, Inc., a US-based producer of medium-power DC/DC converters, data acquisition products and digital panel meters. In September, C&D completed the acquisition of CPS, the former Power Systems Division of Celestica, Inc., a Canadian manufacturer of DC/DC and AC/DC power supplies.
