LTC3445EUF#TRPBF

Overview

The LTC3445EUF#TRPBF is a power management integrated circuit from Analog Devices, featuring one synchronous buck converter and two low-dropout linear regulators. It operates with an input voltage range of 2.7V to 5.5V. The buck regulator delivers up to 600mA output current at frequencies selectable between 1MHz and 1.5MHz, providing an adjustable output voltage from 850mV to 1.55V. The device integrates two LDOs for auxiliary supplies. It is housed in a 24-lead, 4mm x 4mm QFN package designed for space-constrained applications requiring efficient multi-rail power generation.

Feature Summary

• Integrates a high-efficiency synchronous buck converter with dual low-dropout linear regulators in a single compact package
• Offers flexible switching frequency selection to optimize efficiency and external component size
• Provides precise regulation for multiple voltage rails suitable for complex digital systems

Applications

• Portable handheld devices requiring multiple regulated supply rails
• Embedded systems with strict space limitations
• Battery-powered equipment needing efficient power conversion

Procurement Notes

Verify the specific suffix and package variant against official Analog Devices documentation before procurement. Ensure compatibility with your board layout regarding the QFN-24 footprint. Confirm that the operating temperature range meets your system requirements. Cross-reference the manufacturer part number with authorized distributors to avoid counterfeit components. Check for any recent product change notifications affecting specifications or packaging.

Selection Notes

Select this component when designing systems that require a combination of switched-mode and linear regulation within a small form factor. It is appropriate for applications where input voltages are typically 3.3V or 5V. Consider the thermal performance of the QFN package under maximum load conditions. Evaluate the need for the specific output voltage ranges provided by the integrated LDOs and buck converter.

Part Context

This part belongs to the LTC3445 family of mixed-signal power management ICs. It is designed to replace discrete solutions comprising separate buck controllers and LDOs. The integration reduces bill of materials count and simplifies PCB layout. It serves as a central power distribution unit in modern portable electronics.

FAQ

What is the maximum output current for the buck converter section?

The buck converter section supports a maximum output current of 600mA.

Does the device support adjustable switching frequencies?

Yes, the switching frequency can be selected to optimize performance based on application needs.