LT3668IMSE#PBF

Overview

The LT3668IMSE#PBF is a Power Management IC (PMIC) from Analog Devices Inc. featuring three integrated outputs: one synchronous buck converter and two low-dropout linear regulators. It operates with an input voltage range of 1.6V to 40V. The switching frequency for the buck regulator is adjustable between 250kHz and 2.2MHz. Output 1 provides up to 400mA at voltages from 1.2V to 39.4V, while Outputs 2 and 3 each provide up to 200mA at voltages from 1.1V to 10V. The device is housed in a 16-lead MSOP package with an exposed pad.

Feature Summary

• Integrates a high-efficiency synchronous buck converter alongside two precision LDOs within a single compact package.
• Features an adjustable switching frequency range to optimize efficiency and minimize external component size.
• Includes thermal regulation and current limit protection for robust operation under varying load conditions.

Applications

• Portable instrumentation requiring multiple regulated supply rails
• Industrial control systems with mixed analog and digital power needs
• Battery-powered devices utilizing wide input voltage ranges

Procurement Notes

Verify the specific suffix 'IMSE' against official datasheets to confirm temperature grade and package variant. Confirm RoHS compliance status via the manufacturer's declaration. Check for recent Package Change Notices (PCN) regarding epoxy or marking updates. Ensure availability aligns with project timelines as supply may be limited.

Selection Notes

Select this component when a design requires a combined solution of switching and linear regulation to save board space. The wide input voltage range supports various battery chemistries. Verify that the required output currents for the LDOs do not exceed 200mA and that the buck converter handles the primary load. Consider thermal performance in the final enclosure design.

Part Context

This part belongs to the LT3668 family of multi-output PMICs designed for space-constrained applications. It consolidates power management functions typically requiring separate discrete components. The MSOP-EP package facilitates heat dissipation through the exposed pad, supporting reliable operation in dense PCB layouts.

Replacement Considerations

Consult official documentation for direct pin-to-pin replacements. Cross-reference with other Analog Devices PMICs offering similar topology if availability is constrained. Verify functional compatibility before substitution.