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LTC2928 Datasheet(PDF) 1 Page - Linear Technology |
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LTC2928 Datasheet(HTML) 1 Page - Linear Technology |
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1 / 32 page  LTC2928 1 2928f Multichannel Power Supply Sequencer and Supervisor The LTC®2928 is a four channel cascadable power supplysequencerandhighaccuracysupervisor.Sequenc- ing thresholds, order and timing are configured with just a few external components, negating the need for PC board layout or software changes during system development. Multiple LTC2928s may be easily connected to sequence an unlimited number of power supplies. Sequence outputs control supply enable pins or N-channel pass gates. Precision input comparators with individual outputs monitor power supply voltages to 1.5% accuracy. Supervisory functions include undervoltage and overvoltage monitoring and reporting as well as μP reset generation. RST may be forced high to complement margin testing. Application faults, whether internally or externally gener- ated, can shutdown all controlled supplies. The type and source of faults are reported for diagnosis. Individual channel controls are available to independently exercise enable outputs and supervisory functions. A high voltage input allows the LTC2928 to be powered from voltages as high as 16.5V. A buffered reference output permits single negative power supply sequencing and monitoring operations. ■ Network/Telecom Infrastructure ■ Sequencing for Multiple I/O and Core Voltages ■ Power Management ■ Easily Configure Power Management without Software ■ Controls Up to Four Supplies per Device ■ Cascades for Additional Supplies ■ Staged Supply Sequencing with Adjustable Time Positions ■ Fault Event Reporting with Diagnostics ■ Selectable System Shutdown on Fault ■ 1.5% Undervoltage Monitor Accuracy ■ Overvoltage and/or Fault Indication ■ Configurable Undervoltage and Overvoltage Thresholds ■ Charge Pumped Enable Pins Drive N-Channel MOSFETs ■ Operates from 2.9V to 16.5V ■ 5mm × 7mm 38-lead QFN and 36-lead SSOP Packages APPLICATIO S FEATURES DESCRIPTIO TYPICAL APPLICATIO , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents including 4843302, 6949965. RT1 RT2 RT3 RT4 V1 12V ON 10k V2 V3 V4 LTC2928 ON 10k 10k 10k 10k FAULT SYSTEM RESET 1.8V 2.5V 1.2V 3.3V 12.1k 23.2k 36.5k 51.1k 95.3k 0.047 F 3300pF 0.1 F 100 1 F 24.3k 9.53k 1.5k 3.4k RST OV FLT DONE VCC 2928 TA06 GND MS1 VSEL RTMR PTMR EN2 HVCC EN1 EN4 EN3 STMR VIN VOUT RUN LTM4600 VIN VOUT RUN LTC3414 VIN VOUT RUN LTC1628 VIN VOUT AUSTIN LYNX AXA010AY93 ALL RESISTORS 1% Si7894ADP 3.3V 2.5V 1.8V 1.2V ON START SEQUENCE UP START SEQUENCE DOWN SEQUENCE UP COMPLETE SEQUENCE DOWN COMPLETE DONE 2928 TA07 1V/DIV Sequencing Up and Down |
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Similar Description - LTC2928 |
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