SPI-8003TW: Dual 1.5 A DC/DC Step-Down Converter

Designed to meet high-current requirements at high efficiency in industrial and consumer applications; embedded core, memory, or logic supplies; TVs, VCRs, and office equipment, the SPI-8003TW DC-to-DC step-down (buck) converter offers a variable 200 to 400 kHz switching frequency essential for small external components. The N-channel high-current FET is included on the die along with the oscillator, control, and logic circuitry.

A wide input voltage range and integrated thermal and overcurrent protection enhance overall system reliability. Reference accuracy and excellent temperature characteristics are provided. A chip-enable input gives the designer complete control over power-up, standby, or power-down.

This device is supplied in a 16 lead surface-mount plastic SOIC with exposed pad to provide a low-resistance path for maximum power dissipation, low junction temperature, and improved reliability.

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  • Input range to 38 V
  • Adjustable 1 to 24 V output range
  • 1% output voltage tolerance
  • Output current to 1.5 A
  • Foldback current limiting
  • 200 to 400 kHz switching frequency
  • 1.0 µA maximum standby current
  • 1.0 V feedback reference voltage
  • Soft start avoids supply voltage dip
  • Remote voltage sensing
  • Exposed pad for superior heat dissipation
  • Thermal protection

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Functional Block Diagram Package

Part Number Specifications and Availability

Part Number Package Type Temperature RoHS
Part Composition /
RoHS Data
Comments Samples Check
Distributor Stock
SPI-8003TW 16-lead SOIC -40°C to 135°C Yes View Data New 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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