LTC2928IG

Supervisors Overview

The LTC2928IG is a multichannel power supply sequencer and supervisor manufactured by Analog Devices Inc. It features a 38-pin QFN package with an exposed pad, designed for industrial temperature ranges from -40°C to +85°C. The device supports four independent channels for monitoring and sequencing power rails. It provides processor supervision with adjustable or selectable reset threshold voltages and active-low reset outputs. The component integrates precise timing control for power-up and power-down sequences, ensuring reliable system initialization in complex multi-rail environments.

Supervisors Feature Summary

• Multichannel power supply sequencing and supervision
• Adjustable or selectable reset threshold voltages
• Active-low reset output generation
• Industrial temperature range operation

Supervisors Applications

• Processor board power management
• Multi-rail FPGA power sequencing
• Industrial control system supervision
• Communication equipment power monitoring

Supervisors Procurement Notes

Verify the specific suffix (e.g., #PBF for tube, #TRPBF for tape and reel) when ordering to ensure correct packaging. Confirm the temperature grade matches the application requirements, as the 'I' designation indicates industrial range. Cross-reference the datasheet pinout and electrical characteristics against the target design specifications to ensure compatibility with existing power rail architectures and reset logic requirements.

Supervisors Selection Notes

Select this component for designs requiring synchronized sequencing of multiple voltage rails with precise supervision capabilities. The 38-pin QFN package suits space-constrained applications. Ensure the external resistor network for threshold setting aligns with the specific voltage levels of the monitored rails. Consider the thermal performance of the exposed pad for adequate heat dissipation in high-density layouts compared to lower channel count alternatives.

Supervisors Part Context

The LTC2928 belongs to Analog Devices' family of power supply supervisors and sequencers. It complements other devices like the LTC2924, which offers fewer channels but different packaging options. This part is often evaluated using demonstration boards such as the DC1029B to validate timing and sequencing performance before integration into final product designs, ensuring robust power management strategies for critical systems.

Supervisors Replacement Considerations

Direct substitutes include the LTC2928CUHF#PBF for commercial temperature variants and the LTC2928IUHF#PBF for industrial temperature variants in tube packaging. For tape and reel options, consider the LTC2928IUHF#TRPBF. Verify that the alternative suffix meets the specific packaging and temperature requirements of the original design without altering functional parameters.