LTC3445EUF#PBF

Overview

The LTC3445EUF#PBF is a power management IC featuring one synchronous buck converter and two low-dropout linear regulators. It operates from a 2.5V to 5.5V supply with a switching frequency of 1.5MHz. The device provides three outputs: one adjustable or fixed buck output and two LDOs, housed in a 24-lead QFN (4x4mm) package. It supports I2C control for configuration and monitoring, operating within a temperature range of -40°C to +85°C.

Feature Summary

• Integrates a high-efficiency synchronous buck regulator with two independent LDOs for multi-rail power distribution.
• Enables digital control and status monitoring via an I2C-compatible serial interface.
• Utilizes a compact surface-mount QFN package to minimize printed circuit board area requirements.

Applications

• Portable electronic devices requiring multiple regulated voltage rails
• Embedded systems utilizing I2C-configurable power sequencing
• Battery-powered equipment needing efficient step-down conversion

Procurement Notes

Verify the exact suffix against official Analog Devices documentation to confirm pinout and thermal pad specifications. Ensure the procurement channel sources genuine components with valid traceability records. Cross-reference the date code and lot number with manufacturer quality reports to guarantee compliance with RoHS directives and operational reliability standards.

Selection Notes

Select this component when a single-chip solution is required for generating three distinct voltage levels from a low-voltage source. The integrated I2C interface allows for dynamic adjustment and system monitoring, reducing external component count compared to discrete regulator designs. Verify that the load current requirements for each rail fall within the specified limits of the buck and LDO sections.

Part Context

This part belongs to the LTC3445 family of mixed-signal power management ICs designed for space-constrained applications. It combines switching and linear regulation technologies to optimize efficiency and noise performance. The specific EUF suffix denotes the 24-lead QFN package variant suitable for automated surface-mount assembly processes.

Replacement Considerations

Direct replacements must match the 24-QFN footprint and electrical characteristics. Consult Analog Devices application notes for compatible alternatives within the PMIC portfolio that offer similar I2C control features and output configurations.

FAQ

Does the LTC3445EUF#PBF include an internal supervisor?

No, the datasheet specifies that this particular variant does not include an integrated supervisor function.

What is the maximum switching frequency of the buck converter section?

The synchronous buck converter operates at a fixed switching frequency of 1.5MHz.