LT3693IDD#TRPBF

Overview

The LT3693IDD#TRPBF is a monolithic synchronous step-down DC/DC converter manufactured by Analog Devices Inc. It operates with an input voltage range of 3.6V to 36V and delivers up to 3.5A of output current. The device features an adjustable output voltage starting from 0.79V, with a maximum limit of 30V. It utilizes a fixed 230kHz switching frequency that can be synchronized or adjusted up to 2.45MHz. The IC is housed in a 10-lead MSOP package with an exposed thermal pad, designed for surface mount installation. It supports operation across a junction temperature range of -40°C to +125°C.

Feature Summary

• Integrated synchronous rectification topology eliminates the need for external Schottky diodes.
• Built-in power good indicator provides a digital signal when the output reaches regulation.
• Supports cycle-by-cycle current limiting and thermal shutdown for robust protection.

Applications

• Point-of-load regulation for industrial control systems
• Power distribution networks in telecommunications equipment
• Battery-powered devices requiring efficient step-down conversion

Procurement Notes

Verify the specific suffix IDD against the official datasheet to confirm the operating temperature grade and package variant. Confirm RoHS compliance status through the manufacturer's documentation. Ensure the ordering part number matches the exact tape and reel configuration required for your assembly process. Cross-reference the manufacturer part number with authorized distributors to validate authenticity and supply chain integrity.

Selection Notes

Select this component when an input voltage up to 36V is required with high efficiency at moderate currents. The 10-MSOP package suits designs with limited board space but adequate thermal management capabilities. Consider the fixed internal switching frequency if EMI filtering constraints allow, or utilize the sync pin if system-wide clock synchronization is necessary. Evaluate thermal performance based on the expected ambient temperature and load conditions.

Part Context

This part belongs to the LT3693 family of high-voltage synchronous buck converters. It shares architectural similarities with other members like the LT3693IMSE but differs in package type and temperature rating. The series is designed for applications requiring wide input voltage ranges and compact footprints. It complements Analog Devices' portfolio of power management solutions for industrial and communication markets.

Replacement Considerations

LT3680EMSE#TRPBF

FAQ

What is the minimum output voltage achievable with this regulator?

The minimum adjustable output voltage is 0.79V.

Does the LT3693IDD include internal freewheeling diodes?

Yes, it uses a synchronous rectifier topology with integrated N-channel MOSFETs instead of external diodes.