ARG81300SESWTR

Overview

The ARG81300SESWTR is a single-channel low-noise buck regulator (LNBR) designed for satellite TV receiver systems. It integrates a monolithic boost converter and an LDO to power and interface with Low Noise Block downconverters via coaxial cable. The device operates at a switching frequency of 704 kHz, supporting compact passive filter designs. It features a 3x3 mm QFN package with a thermal exposed pad.

Feature Summary

• Integrates boost MOSFET, current sensing, and compensation circuitry
• Compatible with low-profile ceramic capacitors for stable operation
• SLEEP pin enables ultra-low power consumption modes
• Adjustable output current limit with shutdown timer

Applications

• Satellite television receiver systems
• Low Noise Block downconverter power supply
• Coaxial cable powered interface circuits

Procurement Notes

Verify the specific suffix 'ESWTR' against official Allegro MicroSystems documentation to confirm the MLCC-compatible variant status. Ensure compatibility with RoHS standards and moisture sensitivity levels as defined in the datasheet. Confirm that the 3x3 mm QFN package dimensions align with PCB footprint requirements before finalizing procurement orders.

Selection Notes

Select this component when designing satellite receivers requiring integrated boost and regulation for LNBs. The 704 kHz frequency allows for smaller external components compared to lower-frequency alternatives. Consider the adjustable current limit range for protecting downstream LNB circuits from overcurrent conditions during startup or fault states.

Part Context

This part belongs to the ARG81300 series of specialized PMICs. It serves as an MLCC-compatible version of the A8304, optimized for modern surface-mount assembly processes. The integration reduces the bill of materials by combining boost and linear regulation functions into a single small-footprint package.

Replacement Considerations

The ARG81300SESWTR is explicitly documented as the MLCC version of the A8304. Verify pinout and functional equivalence if substituting with other Allegro LNB regulators. Cross-reference package dimensions to ensure mechanical fit within existing satellite receiver enclosures.