09 June 2011
The new A8582 and A8583 from Allegro MicroSystems Europe are robust automotive-grade buck regulator ICs with high switching
frequency and output current and a wide input voltage range.
Each device integrates a low-resistance high-side N-channel MOSFET, and incorporates current-mode control to provide excellent loop stability and transient response.
The A8582/83 devices use external compensation to accommodate a wide range of power components and optimise transient response without sacrificing stability. Both devices regulate input voltages from 4.7V to 36V down to output voltages as low as 0.8V, and are able to supply load current of at least 2A (A8582) or 3.5A (A8583).
Protection features include input undervoltage lockout protection, cycle-by-cycle overcurrent protection, “hiccup” mode short-circuit protection, overvoltage protection and thermal shutdown. In addition, the A8583 provides unique missing-diode protection, open-circuit, adjacent pin short-circuit and short-to-ground protection at every pin to satisfy the most demanding applications.
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