LT1506IR-3.3SYNC#PBF

Overview

The LT1506IR-3.3SYNC#PBF is a synchronous step-down switching regulator manufactured by Analog Devices Inc., housed in an 8-pin D2PAK package with a thermal tab. It provides a fixed 3.3V output capable of delivering up to 4.5A of load current. The device operates from an input voltage range of 4V to 15V and utilizes a fixed internal switching frequency of 500kHz. This monolithic buck converter integrates a 4.5A power switch, oscillator, control logic, and error amplifier, offering a compact solution for efficient DC-DC conversion in space-constrained applications.

Feature Summary

• Synchronous rectification architecture for enhanced efficiency
• Integrated high-current power switch eliminating external components
• Fixed 500kHz switching frequency for optimized passive size
• Optimized operation for lower input voltage ranges

Applications

• Point-of-load regulation for digital circuits
• Battery-powered equipment power management
• General-purpose DC-DC conversion modules

Procurement Notes

Verify the specific suffix 'SYNC' against official Analog Devices documentation to confirm the presence of synchronized clocking features or phase alignment capabilities. Ensure the 'PBF' designation corresponds to lead-free compliance requirements mandated by your assembly process. Cross-reference the manufacturer's latest datasheet revision to validate pinout compatibility and thermal performance specifications before finalizing procurement orders.

Selection Notes

Select this component when a fixed 3.3V output at 4.5A is required within a 4V to 15V input window. The integrated synchronous design reduces external component count compared to non-synchronous alternatives. Consider the 500kHz frequency trade-off between inductor size and electromagnetic interference. Verify that the D2PAK package thermal dissipation meets the system's ambient temperature constraints without excessive heatsinking.

Part Context

This part belongs to the LT1506 family of monolithic buck regulators, which are functionally similar to the LT1374 but optimized for lower input voltages. While the LT1374 supports inputs up to 25V, the LT1506 series is designed for the 4V to 15V range. The SYNC variant typically indicates synchronization capabilities or specific timing characteristics relative to the standard version, distinguishing it within the broader LT1506 product line.

Replacement Considerations

LT1506CR-3.3#TR: Alternative package and tape-and-reel format.

FAQ

How does the LT1506 differ from the LT1374?

The LT1506 is optimized for lower input voltages (4V to 15V) compared to the LT1374 (5.5V to 25V), while maintaining functional similarity.

What is the maximum output current capability?

The device can deliver a continuous output current of up to 4.5A.