LT3493EDCB-3#TRPBF

Overview

The LT3493EDCB-3#TRPBF is a monolithic step-down DC/DC converter manufactured by Analog Devices Inc. It features an internal 1.75A power switch and operates with a fixed switching frequency of 750kHz. The device accepts input voltages ranging from 3.6V to 36V, with a maximum rating of 40V. It provides a fixed output voltage of 3.3V and delivers up to 1.2A of output current. Packaged in a thermally enhanced 2mm x 3mm DFN-6 case, it supports surface mount installation.

Feature Summary

• Integrates a 1.75A power switch for high current capability within a compact footprint
• Utilizes current mode PWM control architecture for stable regulation
• Includes cycle-by-cycle current limit protection against shorted outputs
• Features soft-start functionality to eliminate input current surge during start-up

Applications

• Regulating power from unregulated wall transformers
• Power supply conditioning for 24V industrial supplies
• Battery management systems utilizing automotive batteries
• General purpose step-down conversion in space-constrained designs

Procurement Notes

Verify the specific suffix designation carefully, as variants such as LT3493EDCB#TRM may differ in RoHS compliance status or lead content compared to the #TRPBF version. Confirm package dimensions match the 2mm x 3mm DFN specification required for your PCB layout. Ensure thermal pad connectivity is addressed according to the datasheet recommendations for optimal heat dissipation.

Selection Notes

Select this component when a fixed 3.3V output is required from a wide input range between 3.6V and 36V. The 750kHz frequency allows for smaller passive components compared to lower frequency alternatives. Consider the 1.2A output limit and ensure the application load does not exceed this threshold. The DFN-6 package is suitable for applications prioritizing minimal board space utilization.

Part Context

This part belongs to the LT3493 family of micro monolithic step-down regulators designed by Linear Technology, now part of Analog Devices. The series is characterized by its ability to operate efficiently over a wide input voltage range while maintaining low output ripple. The ED CB suffix indicates the specific temperature grade and package type, distinguishing it from other pin-compatible or functionally similar buck converters in the portfolio.

Replacement Considerations

LT3493EDCB#TRMPBF: Verify if RoHS compliance requirements differ between the PBF and non-PBF suffixes.