LT3645IMSE#PBF

Voltage Regulators - Linear + Switching Overview

The LT3645IMSE#PBF is a dual-output power management IC from Analog Devices Inc., integrating one synchronous buck converter and one low-dropout linear regulator. It operates with an input voltage range of 3.6V to 36V. The switching regulator provides up to 500mA output current with adjustable voltage between 0.8V and 16V, while the LDO delivers up to 200mA with adjustable voltage between 0.8V and 8V. The device utilizes a fixed 750kHz switching frequency and is housed in a 16-lead MSOP package with an exposed thermal pad.

Voltage Regulators - Linear + Switching Feature Summary

• Integrates a high-efficiency synchronous buck converter and a precision LDO within a single compact package
• Features a fixed 750kHz switching frequency to minimize external component size
• Includes internal soft-start circuitry to limit inrush current during startup
• Supports wide input voltage ranges suitable for various industrial supply rails

Voltage Regulators - Linear + Switching Applications

• Portable instrumentation requiring multiple regulated voltage rails
• Industrial control systems with mixed analog and digital loads
• Battery-powered devices needing efficient step-down conversion
• Embedded systems utilizing standard 12V or 24V bus architectures

Voltage Regulators - Linear + Switching Procurement Notes

Verify the specific suffix against official documentation to confirm temperature grade and packaging type. Ensure compatibility with the intended operating environment regarding thermal dissipation requirements for the MSOP package. Cross-reference the manufacturer's latest datasheet for any recent product change notices affecting pinout or electrical characteristics before finalizing procurement specifications.

Voltage Regulators - Linear + Switching Selection Notes

Select this component when space constraints require combining switching and linear regulation capabilities. The fixed 750kHz frequency offers a balance between efficiency and electromagnetic interference filtering needs. Consider the thermal performance of the exposed pad design for high-current applications. Verify that the required output voltages fall within the specified adjustment ranges for both the buck and LDO channels.

Voltage Regulators - Linear + Switching Part Context

This part belongs to the LT3645 family of dual-output PMICs designed for compact power solutions. It complements other Analog Devices regulators by providing integrated noise-sensitive LDO outputs alongside efficient switching stages. The series targets applications demanding high power density without sacrificing regulatory accuracy.

Voltage Regulators - Linear + Switching Replacement Considerations

Consult official substitution guides for verified alternatives. Generic replacements may differ in thermal resistance or control loop stability.