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Evaluation Board, Synchronous Buck Controller, Adaptive On-Time Control , External Soft Start, 75V


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Product Overview

The ADM00770 from Microchip is a MIC2128YML evaluation board. The MIC2128 is a constant frequency synchronous buck controller featuring a unique adaptive ON time control architecture. The IC operates over an input supply range of 4.5V to 75V and the output voltage is adjustable down to 0.6V with a guaranteed accuracy of ±1%. The board features soft-start (SS) time selection pin which allows the user to adjust the output soft-start time to reduce inrush current from mains during start-up and it also features an auxiliary bootstrap low dropout (LDO) which improves the system efficiency by supplying internal bias power from output of the converter. A logic level enable (EN) signal can be used to enable or disable the controller.
  • Can start-up monotonically into a pre-biased output
  • Open drain power good signal (PG) which signals when the output is in regulation
  • Operates in discontinuous conduction mode during soft-start at light loads
  • 7V to 75V (optimized for 48V) input and 5V at 5A output
  • 300KHz switching frequency (adjustable 270KHz to 800KHz)
  • Requires only a single power supply with at least 10A current capability


Power Management


MIC2128 evaluation board (ADM00770), Important information sheet.


90 Day Warranty only. After Expiration of Warranty returns must be processed via Microchip.


The MIC2128 evaluation board does not have reverse polarity protection. Applying a negative voltage to the VVIN and GND terminals may damage the device.

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