LT1956IGN#PBF

Overview

The LT1956IGN#PBF is a monolithic buck switching regulator manufactured by Analog Devices Inc. It operates with an input voltage range of 5.5 V to 60 V and provides a fixed 5 V output. The device integrates a high-efficiency 1.5 A power switch, oscillator, control logic, and current mode architecture for fast transient response. It supports a switching frequency of 500 kHz and includes shutdown functionality. The component is housed in a 16-lead SSOP package and functions within a temperature range of -40°C to +125°C.

Feature Summary

• Integrates a high-efficiency 1.5 A power switch with all necessary oscillator and control circuitry on a single die
• Utilizes current mode architecture to ensure rapid transient response and stable loop performance
• Features a wide input voltage capability supporting operation from 5.5 V up to 60 V
• Includes dedicated shutdown pin for precise power management and system control

Applications

• Industrial distributed power systems requiring high-voltage step-down conversion
• Automotive electronics power distribution networks
• General-purpose DC-to-DC conversion in equipment operating at elevated voltages
• Power management solutions for battery-operated devices with wide input ranges

Procurement Notes

Verify the specific suffix #PBF indicates lead-free tape and reel or tube packaging as per manufacturer standards. Confirm RoHS compliance status directly with Analog Devices documentation. Check current availability as supply may be restricted or subject to limited production runs. Ensure the SSOP-16 footprint matches your PCB design requirements before finalizing procurement orders.

Selection Notes

Select this component when a fixed 5 V output is required from inputs up to 60 V. The integrated 1.5 A switch suits moderate load applications without external MOSFETs. Consider the 500 kHz frequency for balancing component size and efficiency. Verify thermal dissipation capabilities in the SSOP-16 package for your specific ambient conditions and load currents.

Part Context

This part belongs to the LT1956 series of high-voltage buck regulators. It shares architectural similarities with other members like the LT1956EFE-5 but differs in package type and specific manufacturing lot details. The series is designed for robust performance in demanding industrial and automotive environments where high input voltages are prevalent.

Replacement Considerations

Public confirmed substitute part numbers include LT1956EGN-5#TRPBF and LT1956EGN-5#TR. These variants maintain identical electrical specifications and functionality while differing primarily in packaging format. Cross-reference datasheets to ensure pinout compatibility and thermal characteristics match your existing design constraints.