Overview
The MIC2128 Evaluation Board is a constant-frequency, synchronous buck controller featuring a unique adaptive on-time control architecture. The MIC2128 operates over an input supply range of 4.5V to 75V. The output voltage is adjustable down to 0.6V with a guaranteed accuracy of ±1%. The device operates with programmable switching frequency from 270 kHz to 800 kHz.
The MIC2128 Evaluation 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 startup
• Features an auxiliary bootstrap low-dropout (LDO) which improves the system
efficiency by supplying the internal bias power from the 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
• Features an 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
The basic parameters of the evaluation board are:
• Input: 7V to 75V (Optimized for 48V)
• Output: 5V at 5A
• 300 kHz Switching Frequency (adjustable 270 kHz to 800 kHz)
Documentation
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| MIC2128 User's Guide | User Guide | Download |