LT3645EUD#PBF

Voltage Regulators - Linear + Switching Overview

The LT3645EUD#PBF is a dual-output power management IC from Analog Devices Inc., housed in a 16-lead QFN (3x3) package. It integrates one synchronous buck converter and one low-dropout linear regulator (LDO). The device operates with an input voltage range of 3.6V to 36V. The buck output provides adjustable voltage from 0.8V to 16V at up to 500mA, while the LDO output supports 0.8V to 8V at 200mA. Switching frequency is fixed at 750kHz. It functions within a temperature range of -40°C to 125°C.

Voltage Regulators - Linear + Switching Feature Summary

• Integrates a high-efficiency synchronous buck converter and a precision LDO into a single compact package.
• Supports wide input voltage ranges suitable for various battery-powered and industrial applications.
• Features independent control pins for each regulator channel to allow flexible sequencing and operation.

Voltage Regulators - Linear + Switching Applications

• Portable electronic devices requiring multiple regulated voltage rails
• Industrial equipment with mixed analog and digital power needs
• Battery-operated systems utilizing lithium-ion or lithium-polymer cells

Voltage Regulators - Linear + Switching Procurement Notes

Verify component authenticity by checking manufacturer markings against official datasheet specifications. Confirm package type matches the 16-QFN (3x3) footprint. Ensure the part number suffix corresponds to lead-free RoHS compliance. Cross-reference ordering information with authorized distributors to avoid counterfeit sources.

Voltage Regulators - Linear + Switching Selection Notes

Select this component when space constraints require combining switching and linear regulation. It is appropriate for designs needing a high-current buck stage alongside a lower-current noise-sensitive LDO stage. Consider the 750kHz frequency for passive component sizing relative to lower-frequency alternatives.

Voltage Regulators - Linear + Switching Part Context

This part belongs to the LT3645 family of dual-output PMICs. It is designed to simplify power architecture by reducing board space compared to discrete solutions. The integration allows for efficient power delivery in dense layouts common in modern portable electronics.

Voltage Regulators - Linear + Switching Replacement Considerations

Consult official substitution guides for compatible parts within the same product family. Verify pin compatibility and electrical parameter alignment before replacing.