LT1939EDD#PBF

Overview

The LT1939EDD#PBF is a monolithic step-down regulator and linear regulator/controller manufactured by Analog Devices Inc. It integrates a 2A buck converter with an adjustable output voltage range from 800 mV to 24.25 V, alongside a separate linear regulator or controller output. The device operates with an input voltage between 3 V and 25 V and features a switchable switching frequency from 250 kHz to 2.2 MHz. It utilizes a DFN-12 surface-mount package and supports operation across a temperature range of -40°C to +125°C.

Feature Summary

• Integrates a high-current 2A synchronous buck converter with an independent secondary linear regulator or control channel within a single monolithic package.
• Features a wide adjustable switching frequency range allowing optimization for efficiency or external component size.
• Supports a broad input voltage range suitable for various power supply architectures.

Applications

• Powering dual-rail systems requiring both switched and linear regulation
• Embedded systems with mixed analog and digital load requirements
• Industrial control units needing compact power management solutions

Procurement Notes

Verify the specific suffix and revision level against the official Analog Devices datasheet to ensure compatibility with your design requirements. Confirm availability status through authorized distributors as supply conditions may vary. Ensure proper handling procedures are followed for the DFN-12 package during assembly.

Selection Notes

Select this component when a design requires a combined buck converter and linear regulator in a small footprint. Consider the thermal performance of the DFN-12 package relative to the expected load current. Evaluate the need for the secondary channel's specific function, whether acting as a low-noise LDO or a dedicated controller, to justify the integration over discrete solutions.

Part Context

This part belongs to the LT1939 series of power management ICs designed for applications demanding high integration and space efficiency. It represents a solution for designers needing multiple regulated outputs from a single input source without occupying excessive board area.

Replacement Considerations

LT1939EDD#TRPBF