Part Number: MIC4950YFL-EV
MIC4950YFL EVALUATION BOARD
- Feedback Resistors (R1, R2) for Adjustable Output: The output voltage is set nominally to 1.8V. This output can be changed by adjusting the upper resistor, R1, in the feedback potential divider. Therefore:
- R2 = R1 x VREF/(VOUT-VREF) Where VREF = 0.625V
Overview
This board enables the evaluation of the MIC4950, a fully integrated 5A switching regulator featuring HyperSpeed™ control and Power Good output indication. The MIC4950 is highly efficient throughout the entire output current range, exceeding 95% at5V input to 3.3V output. The MIC4950 provides accurate output voltage regulation under the most demanding conditions and responds extremely fast to a load transient with exceptionally small output voltage ripple.
Precautions:
There is no reverse input protection on this board. Be certain that the correct polarity is observed when connecting the input source. The maximum VIN of the board is rated at 5.5V, and the maximum load current is rated at 5A. Input power leads should ensure negligible voltage drop up to the maximum load, and should be kept as short as possible to minimize inductance. For load transient, and/or pre-biased output start-up testing up to 5.5V VIN, the use of a bulk electrolytic capacitor in position C7 (at least 100µF, 10V rating) is recommended.
N/A
The MIC4950 evaluation board requires a single power source adjustable up to at least 5.5V, with 5A of current capability. The load can either be active (electronic load) or passive (resistor) with the capability to dissipate 20W. It is ideal to have an oscilloscope available to view the circuit waveforms, but not essential. For the simplest tests, two Voltage meters are required to measure input and output voltage. For efficiency measurements, two voltage meters and two ammeters are required to prevent errors due to measurement inaccuracies