A8307: Single Wire Multiswitch (SWM) Regulator

The A8307 single wire multiswitch regulator (SWMR) is a monolithic linear and switching voltage regulator, specifically designed to provide power to single wire multiswitches in satellite TV systems via coaxial cable. The A8307 requires few external components, with the boost switch and compensation circuitry integrated inside of the device.

The integrated boost switch has been optimized to minimize both switching and static losses. To further enhance efficiency and thermal performance, the voltage drop across the tracking regulator is minimized.

A comprehensive set of fault registers are provided, which comply with all the common standards, including: overcurrent, thermal shutdown, undervoltage, and power not good. Furthermore, design methodology and structure ensure the highest level of robustness against transients and component failures. The device uses a 2-wire bidirectional serial interface, compatible with the I2C™ standard, that operates up to 400 kHz.

The A8307 is provided in a 4 × 4 mm QFN package with exposed pad for enhanced thermal dissipation. It is lead (Pb) free, with 100% matte tin leadframe plating.

DATASHEETS
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Astrorep Inc. (Allegro and Sanken Semiconductors, Sanken Power Supplies)
141 John Street, Suite 300
Babylon, NY 11702
Phone: (631)422-2500
Fax: (631)422-2504
Web: www.astrorepinc.com
Email: donna.tweedy@astrorepinc.com

If this is not your local representative, find your local sales rep here.

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  • Features and BenefitsFeatures and Benefits
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  • Meets single wire multiswitch power requirements
  • Integrated boost MOSFET, current sensing, and compensation
  • Adjustable output current limit (0.5 to 1 A) with shutdown delay timer
  • Boost pulse by pulse current limit scales with output current limit
  • 4-output voltage settings to accommodate possible external voltage drops
  • Tracking boost converter minimizes power dissipation
  • Output slew rate control using external soft start pin
  • Low output reverse current, even including during shutdown
  • High voltage ratings to support “surge-to-failure” requirements
  • 2-wire I2C-compatible interface
  • Diagnostic and protection features: UVLO, OCP, TSD, PNG and CPOK
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Product Image Functional Block Diagram

Part Number Specifications and Availability

Part Number Package Type Temperature RoHS
Compliant
Part Composition /
RoHS Data
Comments Samples Check
Distributor Stock
A8307SESTR-T 20-lead QFN -20°C to 85°C Yes View Data Contact your
local sales rep
Check Stock
APEK8307SES-01-MH DEMO BOARD -20°C to 85°C No -- Contact your
local sales rep
Check Stock

Allegro’s products are not to be used in any devices or systems, including but not limited to life support devices or systems, in which a failure of Allegro’s product can reasonably be expected to cause bodily harm.

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