Dual Output Regulator operates at frequencies up to 2 MHz.

Press Release Summary:




Integrating 2% constant on-time buck regulator and 2% linear regulator, A4402 suits microcontroller or DSP-based applications. Unit includes adjustable soft-start timer, watchdog timer to monitor state of microcontroller/DSP, and power-on reset function with adjustable delay as signal to reset microcontroller/DSP. Available in 16-pin TSSOP package, with exposed pad for enhanced thermal dissipation, product features under-voltage lockout, thermal shutdown, and overcurrent protection.



Original Press Release:



Allegro MicroSystems, Inc. Announces New Dual Output Regulator



Integrated Buck 2.0 MHz Switching Frequency Plus Linear Regulator

Worcester, MA - August 25, 2009 - Allegro MicroSystems, Inc. adds a new dual output regulator IC to their existing portfolio of regulators. This new device combines a 2% constant on-time buck regulator and a 2% linear regulator to provide dual output voltages such as those required by microcontroller or DSP-based applications. Allegro's A4402 is targeted at the industrial, consumer and office automation markets.

This new switching regulator includes an adjustable soft-start timer, and is capable of operating at frequencies up to 2 MHz, allowing the system designer the opportunity to select low value inductors and capacitors. Protection features include under-voltage lockout and thermal shutdown. In case of a shorted load, each regulator features overcurrent protection. The A4402 also features a watchdog timer to monitor the state of a microcontroller/DSP, and a power-on reset function with adjustable delay, as a signal to reset the microcontroller/DSP.

Allegro's A4402 is provided in a 16-pin TSSOP package, with exposed pad for enhanced thermal dissipation. It is lead (Pb) free, with 100% matte tin leadframe plating. It is priced at $1.23 in quantities of 1,000 and has a 12-week typical lead-time to market.

About Allegro

Allegro MicroSystems, Inc. is leader in developing, manufacturing and marketing high-performance power and Hall-effect sensor ICs. Allegro's innovative solutions serve high-growth applications within the automotive, communications, computer/office automation, consumer and industrial markets. Allegro is headquartered in Worchester, Massachusetts (USA) with design and applications center located in North and South America, Asia, and Europe. Further information about Allegro can be found at www.allegromicro.com.

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