特点
Easily Con?gure 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
Con?gurable 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
典型应用
典型应用
描述
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 generated, 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.