LT3502AIDC#TRMPBF

Overview

The LT3502AIDC#TRMPBF is a synchronous step-down switching regulator manufactured by Analog Devices Inc. It operates with an input voltage range of 3V to 40V and provides an adjustable output voltage from 0.8V to 36V. The device delivers up to 500mA of output current at a fixed switching frequency of 1.1MHz. Packaged in an 8-WFDFN (2x2) exposed pad surface-mount package, it supports operation across a junction temperature range of -40°C to 125°C. This component functions as a positive, single-output DC-DC converter designed for efficient power management in space-constrained applications.

Feature Summary

• Integrates high-side and low-side N-channel power switches for synchronous rectification
• Features internal soft-start circuitry to limit inrush current during startup
• Includes cycle-by-cycle current limiting and thermal shutdown protection

Applications

• Portable equipment powered by single-cell lithium-ion batteries
• Industrial control systems requiring isolated or non-isolated power rails
• Embedded systems utilizing microcontrollers and DSPs

Procurement Notes

Verify the specific suffix 'A' against the manufacturer's official documentation to confirm performance grade variations compared to standard LT3502 variants. Ensure the ordering part number matches the required tape and reel packaging configuration. Cross-reference the 8-WFDFN footprint dimensions with your PCB layout guidelines prior to procurement to ensure mechanical compatibility.

Selection Notes

Select this component when designing systems requiring wide input voltage ranges up to 40V with moderate output currents near 500mA. The fixed 1.1MHz switching frequency allows for the use of small external inductors and capacitors, reducing overall solution size. Consider the exposed pad thermal requirements for adequate heat dissipation in enclosed environments.

Part Context

This part belongs to the LT3502 family of micropower synchronous buck converters. It shares architectural similarities with other Linear Technology regulators but is distinguished by its specific input voltage tolerance and integrated switch ratings. The IDC suffix denotes the 8-lead DFN package variant, differentiating it from MSOP or SOIC options within the same product line.

Replacement Considerations

LT3502IDC#TRMPBF