Step-Down Regulator targets consumer electronics.

Press Release Summary:

With 50 V input range, High-Voltage Buck Regulator, Model A8499 is suited for applications where 12, 20, 26, and 28 V input voltages may occur. Internal blanking circuit is used to filter out transients due to reverse recovery of external clamp diode. Typical blanking time is 200 nS, and output voltage is adjustable from 1.2-24 V based on resistor divider and 1.2 V, 3% reference. Supplied in eSOIC-8L package, regulator operates in continuous and discontinuous modes.

Original Press Release:

Allegro Microsystems, Inc. Introduces Versatile High-Voltage Step-Down Regulator

A8499 serves as a general-purpose buck regulator for several applications

Worcester, MA, Aug. 24, 2005 - Allegro MicroSystems, Inc. announces the release of the A8499 High-Voltage Step-Down Regulator. This general-purpose buck regulator can be used in a wide variety of applications; the 50 V input range makes it ideal for consumer electronics and industrial applications where 12 V/20 V/28 V/26 V input voltages may occur.

The A8499 can handle a wide input of operating voltage ranges. The regulator requires an external clamping diode, inductor and filter capacitor, and the off time is determined by an external resistor. It will operate in both continuous and discontinuous modes. An internal blanking circuit will be used to filter out transients due to the reverse recovery of the external clamp diode. Typical blanking time is 200 nS, and the output voltage is adjustable from 1.2 V to 24 V based on a resistor divider and the 1.2 V 3 percent reference.

The A8499 is ideal for various end products including applications with 8 to 50 V
input voltage range needing a buck regulator for 1.5 A output current, consumer equipment power, uninterruptible power supplies, 12 V lighter-powered applications (portable DVD, etc.), automotive 9 to 16 V input applications with higher voltage protection, point of sale (POS) applications, and industrial applications with 24 V or 36 V bus. Supplied in an eSOIC-8L package, the A8499 has an eight- to 12-week leadtime to market and is priced at $0.71 for quantities of 10,000.

Allegro MicroSystems, Inc. is a supplier of advanced mixed-signal power semiconductors and Hall-effect sensors targeted toward the automotive, communications, computer/office automation, consumer and industrial markets. It maintains a leadership position in the integrated magnetic sensor and integrated motor driver product segments. With more than 2,000 employees, Allegro is headquartered in Worcester, MA. Further information about Allegro, including free samples of our products, can be found at

More from Software

All Topics