LT3972EDD#PBF

Overview

The LT3972EDD#PBF is a synchronous step-down switching regulator manufactured by Analog Devices Inc. It operates with an input voltage range of 3.6 V to 33 V and delivers up to 3.5 A of output current. The device features a fixed switching frequency of 2.45 MHz, allowing for the use of small external components. It supports output voltages from 790 mV to 30 V. The IC includes a low quiescent current of 75 uA during operation and drops to 30 uA in shutdown mode. It is housed in a DFN-10 package and functions within a temperature range of -40°C to +125°C.

Feature Summary

• Integrates high-side and low-side N-channel power switches for efficient synchronous rectification without requiring external Schottky diodes.
• Features constant-frequency current mode control architecture that provides fast transient response and inherent cycle-by-cycle current limit protection.
• Includes programmable soft-start capability to limit inrush current during startup and reduce stress on input capacitors.

Applications

• Point-of-load regulation for industrial equipment
• Power distribution systems in automotive electronics
• Battery-powered portable devices requiring high efficiency

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and specific lot traceability requirements before integration. Ensure storage conditions meet moisture sensitivity level specifications to prevent package damage during soldering processes.

Selection Notes

Select this regulator when input voltages exceed standard 5 V or 12 V rails but remain below 33 V. The 2.45 MHz frequency enables compact passive component selection compared to lower-frequency alternatives. Evaluate thermal performance based on PCB copper area availability, as the DFN-10 package relies on board heat dissipation for optimal operation under heavy load conditions.

Part Context

This component belongs to the LT3972 family of high-voltage synchronous buck converters. It shares architectural similarities with other parts in the series but is distinguished by its specific pinout configuration and electrical ratings designed for mid-power applications. The EDD suffix indicates the specific tape-and-reel packaging variant available for automated assembly lines.

Replacement Considerations

LT3972IDD#PBF serves as a direct functional substitute within the same product family, offering identical electrical characteristics and pin compatibility for design upgrades or supply chain adjustments.