LT1939EDD#TRPBF

Overview

The LT1939EDD#TRPBF is a monolithic step-down regulator and linear regulator/controller manufactured by Analog Devices Inc. It integrates a 2 A buck converter with an adjustable output voltage range of 800 mV to 24.25 V, alongside a secondary linear regulator or controller output. The device operates from an input voltage range of 3 V to 25 V and features a switch frequency adjustable between 250 kHz and 2.2 MHz. It has a typical quiescent current of 2.5 mA and functions within a temperature range of -40°C to +125°C. The component is housed in a DFN-12 surface-mount package.

Feature Summary

• Integrates a high-current 2 A synchronous buck converter with an adjustable output voltage capability.
• Includes a secondary integrated linear regulator or controller channel for auxiliary power management.
• Features a wide input voltage operating range suitable for single-cell lithium-ion battery applications.
• Offers flexible switching frequency adjustment to optimize external component size and efficiency.

Applications

• Battery-powered portable equipment requiring efficient dual-rail power generation
• Industrial control systems utilizing single-cell lithium-ion power sources
• Embedded systems needing combined switching and linear regulation in a compact footprint

Procurement Notes

Verify the specific suffix against official documentation to confirm tape-and-reel packaging configuration. Ensure the part number matches the exact thermal and electrical specifications required for the target application environment. Cross-reference the manufacturer's latest datasheet for any updates regarding pinout compatibility or recommended operating conditions before finalizing procurement orders.

Selection Notes

Select this component when a design requires both a high-current switching rail and a secondary regulated output from a single IC. Consider the DFN-12 package constraints for thermal dissipation at maximum load currents. Evaluate the need for external frequency synchronization if noise immunity is critical in the system architecture.

Part Context

This part belongs to the LT1939 family of mixed-signal power management ICs designed for space-constrained applications. It combines the efficiency of a switching regulator with the low noise characteristics of a linear regulator. The EDD suffix indicates a specific lead-free and RoHS-compliant DFN-12 package variant optimized for surface-mount assembly processes.

Replacement Considerations

LT1939EDD#PBF