LT1506IR-SYNC#PBF

Overview

The LT1506IR-SYNC#PBF is a synchronous step-down switching regulator manufactured by Analog Devices Inc. It operates with an input voltage range of 4V to 15V and provides a fixed output voltage of 3.3V at up to 4.5A. The device integrates a 4.5A power switch and functions as a monolithic buck mode regulator with a fixed 500kHz switching frequency. It is housed in an 8-lead D2PAK package.

Feature Summary

• Integrates a 4.5A synchronous power switch for high current capability
• Optimized for lower input voltage applications compared to the LT1374
• Includes on-chip oscillator, control, and logic circuitry

Applications

• 5V to 3.3V step-down conversion circuits
• Low input voltage DC-DC regulation systems

Procurement Notes

Verify the exact suffix #PBF indicates lead-free packaging when sourcing. Confirm the IR suffix corresponds to the industrial temperature range specifications required for your design environment. Ensure the D2PAK footprint matches your PCB layout constraints before finalizing procurement.

Selection Notes

Select this component when input voltages fall between 4V and 15V, distinguishing it from the LT1374 which requires higher inputs. Choose the SYNC variant for synchronous rectification efficiency. Verify that the 500kHz frequency aligns with your EMI and inductor size requirements.

Part Context

This part belongs to the LT1506 family of switching regulators. It is functionally identical to the LT1374 but specifically optimized for lower input voltage ranges. The device combines a buck converter topology with integrated control logic to simplify power supply design.

Replacement Considerations

LT1374 is the functional equivalent but supports a wider input range of 5.5V to 25V.