Allegro expands their current family of step-down regulators by adding a 3A adjustable fixed off-time, current-mode-controlled buck-switching regulator.

This new device can be used in a wide variety of applications; the 8 V to 50 V input range makes it ideal where a wide range of input voltages may occur. 

The regulator only 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 0.8 V to 24 V based on a resistor divider and the 0.8 V  +/- 3 percent reference.

Allegro's A8498 is supplied in an eSOIC-8L package.

This enables a very compact and power efficient design, resulting in a more cost effective overall solution.