LTC3670EDDB

Overview

The LTC3670EDDB is a monolithic power management IC featuring a 400mA synchronous buck regulator and two 150mA low dropout linear regulators (LDOs) in a 3mm x 2mm DFN package. It operates with an input voltage range of 2.5V to 5.5V, suitable for single-cell lithium-ion applications. The buck converter provides a 1.2V output at 400mA, while the LDOs deliver 150mA each at 2.8V and 3.3V outputs. The device achieves up to 85% efficiency in buck mode.

Feature Summary

• Integrates a high-efficiency synchronous buck regulator with dual low dropout linear regulators in a compact footprint
• Designed for low-voltage systems requiring multiple regulated rails from a single cell source
• Supports direct powering of low voltage ASICs and SoCs without additional level shifting

Applications

• Single-cell Lithium-Ion battery powered devices
• Lithium-Ion/Polymer application power supplies
• Low voltage ASIC and SoC multi-rail power distribution

Procurement Notes

Verify the specific suffix against official Analog Devices documentation to confirm pinout and thermal characteristics. Ensure the component matches the required operating temperature range and package tolerance. Cross-reference the manufacturer part number with authorized distributors to avoid counterfeit sources. Confirm that the selected variant supports the necessary output current requirements for the target design.

Selection Notes

Select this component when space constraints require a combined buck and LDO solution in a small DFN package. It is appropriate for designs needing a primary switching rail and secondary linear rails from a 2.5V to 5.5V input. Consider the total available current budget across all three outputs during system architecture planning.

Part Context

This part belongs to the LTC3670 family of integrated power solutions. It consolidates switching and linear regulation functions typically found in separate components. The family targets portable electronics where board area and component count are critical design parameters.

Replacement Considerations

Public confirmed substitute part numbers: LTC3672B-1, LTC3672B-2.