LTC2928CUHF#PBF

LTC®2928 is a four channel cascadable power supply sequencer and high accuracy supervisor. Sequencing 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. Active-low RST may be forced high to complement margin testing. Typical applications are 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
• VCC input supply range from 2.9 to 6V (TA=25°C, VCC=3.3V)
• VCC input supply current is 2.5mA maximum (HVCC=GND, TA=25°C, VCC=3.3V)
• 38-lead (5mm × 7mm) plastic QFN package
• Temperature rating range from 0°C to 70°C

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party