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DC Switching Regulators

ModelDescriptionBrandLeadingConditionPriceAction
DC Switching Regulators
LT1370CR#PBF
DESCRIPTIONThe LT ®1370 is a 500kHz current mode switching regulator specially configured to create a constant- or programmable-current/constant-voltage battery charger. In addition to the usual voltage feedback node, it has a current sense feedback circuit for accurately controlling output current of a flyback or SEPIC (Single-Ended Primary Inductance Converter) topology charger. These topologies allow the current sense circuit to be ground referred and completely separated from the battery itself, simplifying battery switch ing and system grounding problems. In addition, these topologies allow charging even when the input voltage is lower than the battery voltage. The LT1513 can also drive a CCFL Royer converter with high efficiency in floating or grounded mode.FEATURES■ Charger Input Voltage May Be Higher, Equal to or Lower Than Battery Voltage■ Charges Any Number of Cells Up to 20V■ 1% Voltage Accuracy for Rechargeable Lithium Batteries■ 100mV Current Sense Voltage for High Efficiency (LT1513)■ 0mV Current Sense Voltage for Easy Current Programming (LT1513-2)■ Battery Can Be Directly Grounded■ 500kHz Switching Frequency Minimizes Inductor Size■ Charging Current Easily Programmable or Shut DownAPPLICATIONS■ Charging of NiCd, NiMH, Lead-Acid or Lithium Rechargeable Cells■ Precision Current Limited Power Supply■ Constant-Voltage/Constant-Current Supply■ Transducer Excitation■ Universal Input CCFL Driver
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LT1171HVCT#PBF
SEPIC Regulators, Linear TechnologyA range of SEPIC DC-DC Converters from Linear Technology which can be used in applications where the output voltage may be either higher or lower than the input voltage. The SEPIC (Single-Ended Primary-Inductor Converter) topology also allows these converters to produce a negative output from a positive input voltage. Some of these switching regulators include features such as multiple outputs, programmable current limit, low battery detection and burst-mode operation.Wide Input Voltage Range: 3V to 60VLow Quiescent Current: 6mAInternal 5A Switch (2.5A for LT1171, 1.25A for LT1172)Shutdown Mode Draws Only 50μA Supply CurrentVery Few External Parts RequiredSelf-Protected Against OverloadsOperates in Nearly All Switching TopologiesFlyback-Regulated Mode Has Fully Floating OutputsComes in Standard 5-Pin PackagesLT1172 Available in 8-Pin MiniDIP and Surface Mount PackagesCan Be Externally SynchronizedUser Note:This data sheet is only intended to provide specifications, graphs, and a general functional description of the LT1170/LT1171/LT1172. Application circuits are included to show the capability of the LT1170/LT1171/LT1172. A complete design manual (AN19) should be obtained to assist in developing new designs. This manual contains a comprehensive discussion of both the LT1070 and the external components used with it, as well as complete formulas for calculating the values of these components. The manual can also be used for the LT1170/LT1171/LT1172 by factoring in the higher frequency. A CAD design program called SwitcherCAD® is also available.
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KA1238EC(ball)
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KA1238HA1(ball)
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KA1238HA2(ball)
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KA1238XA2(ball)
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KA1238XA3(ball)
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