A8307SESTR-T

Overview

The A8307SESTR-T is a single-line multi-switch (SWM) linear switch regulator designed for satellite television systems. It provides power to SWM devices via coaxial cable, integrating a boost switch and compensation circuitry to minimize external component count. The device features an I2C-compatible two-wire serial interface for control and diagnostics. Key electrical characteristics include an adjustable output current limit ranging from 0.5 A to 1 A with shutdown delay timing, and four selectable voltage settings to compensate for external voltage drops. It operates within a specified temperature range and includes protection against overcurrent, overtemperature, undervoltage, and power-good faults.

Feature Summary

• Integrates a boost MOSFET, current sensing, and compensation circuitry to reduce external component requirements.
• Features an adjustable output current limit with shutdown delay timer to manage power delivery.
• Includes comprehensive diagnostic registers and protection mechanisms such as overcurrent, overtemperature shutdown, and undervoltage lockout.
• Supports a two-wire bidirectional serial interface compatible with the I2C standard for system control.

Applications

• Satellite television systems
• Single-line multi-switch (SWM) power supply
• LNBR (Low-Noise Block downconverter with Receiver) applications

Procurement Notes

Verify the specific suffix 'SESTR-T' against the manufacturer's official datasheet to confirm package type, tape-and-reel specifications, and RoHS compliance status. Ensure the ordering part number matches the exact revision required for your design, as Allegro may update packaging or material compositions without changing the base model number. Cross-reference with authorized distributors to confirm current availability and lead times.

Selection Notes

Select this component when designing power supplies for satellite receivers requiring integrated boost regulation and SWM compatibility. Consider its thermal performance in the QFN package and the necessity of the I2C interface for system monitoring. Evaluate if the adjustable current limit and voltage settings meet the specific load requirements of the connected SWM hardware.

Part Context

The A8307 belongs to Allegro MicroSystems' specialized power management portfolio targeting satellite communication infrastructure. It addresses the need for compact, efficient power solutions in consumer electronics where space constraints and reliability are critical. This series integrates functions that typically require discrete components, simplifying the PCB layout and reducing overall system cost.

Replacement Considerations

Consult Allegro MicroSystems documentation for officially confirmed substitute part numbers. Verify pin-to-pin compatibility and electrical parameter equivalence before substitution.