LTC1728ES5-3.3#TRPBF

Supervisors Overview

The LTC1728ES5-3.3#TRPBF is a triple supply monitor designed for systems with multiple voltage rails. It features three open-drain outputs for individual power monitoring, including a dedicated output tied to the DC/DC feedback divider via VCCA. The device provides active-low reset signals with a minimum reset timeout of 140ms. It operates within a temperature range of -40°C to 85°C and utilizes a TSOT-23-5 surface-mount package.

Supervisors Feature Summary

• Triple supply monitoring capability with independent open-drain outputs for each rail
• Dedicated VCCA input connection for direct integration with DC/DC feedback dividers
• Active-low reset signal generation with configurable timeout characteristics

Supervisors Applications

• Monitoring multiple power supplies in embedded systems
• Integrating with DC/DC converters using feedback divider connections
• Processor supervision in automotive or industrial environments

Supervisors Procurement Notes

Verify the specific suffix #TRPBF confirms tape-and-reel packaging and lead-free compliance. Confirm the ES5 variant meets automotive qualification requirements if applicable. Ensure the 3.3V threshold setting aligns with the monitored rail specifications. Cross-reference the datasheet revision to validate electrical parameters against current design constraints.

Supervisors Selection Notes

Select this component when simultaneous monitoring of three distinct voltage levels is required. The integrated VCCA feature simplifies designs involving switched-mode power supplies by allowing direct feedback monitoring. Consider the TSOT-23-5 package size for space-constrained layouts. Verify that the open-drain output configuration matches the logic level requirements of the downstream microcontroller or processor.

Supervisors Part Context

This part belongs to the LTC1728 family of triple supply monitors from Analog Devices. It shares functional similarities with the LTC1726 and LTC1727 but offers specific threshold configurations and package options. The ES5 designation indicates an automotive-grade version housed in a TSOT-23-5 package, distinguishing it from standard commercial variants.

Supervisors Replacement Considerations

LTC1728ES5-1.8#TRPBF serves as a direct substitute with different fixed thresholds. Other family members like the LTC1726 offer additional watchdog timer functionality but differ in pinout and package type.