The Microchip MIC2176-1/-2/-3 is a family of constantfrequency, synchronous buck controllers featuring a unique digitally modified adaptive ON-time control architecture. The MIC2176 family operates over an input supply range of 4.5V to 75V. The output voltage is adjustable down to 0.8V with a guaranteed accuracy of ±1%, and the device operates at a switching frequency of 100kHz, 200kHz, and 300kHz.
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The MIC2176 evaluation board requires only a single power supply with at least 10A current capability. A linear regulator, which includes a Zener and an NPN transistor, has been installed on the board to provide housekeeping for the MIC2176 controller. The output load can either be a passive or an active load.