Power

Step-down regulator ICs combine wide input voltage range with 3 A and 4 A outputs

4th January 2007
ES Admin
The new A8698 and A8697 from Allegro MicroSystems Europe are the latest additions to the company's range of step-down regulator ICs.
The two new devices are constant off-time current mode step-down regulators targeted at general-purpose applications requiring an 8 V to 25 V input voltage rating and 3 A (A8698) or 4 A (A8697) output current. The regulated voltage is set by external resistors to output voltages as low as 0.8 V, and the 'off' time can also be set with an external resistor, allowing flexibility in inductor selection.

These regulator ICs include an integrated power DMOS switch to reduce the total solution footprint. They also feature internal compensation, allowing users to design stable regulators with minimal design effort. A logic level 'enable' pin allows the device to be shut down and put into a low quiescent current mode for power sensitive applications.

The A8698 and A8697 can be used as general-purpose buck regulators in a wide variety of applications. The 25 V input range makes these new devices ideal for consumer electronics and industrial applications where 12 V to 25 V input voltages may occur.

Both devices (A8698 and A8697) are supplied in a low-profile 8-lead SOIC with exposed pad (package LJ).

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