MIC38300
EVALUATION BOARD
USER’S GUIDE
2018 Microchip Technology Inc.
DS50002796A-page 9
Chapter 2. Installation and Operation
2.1
INTRODUCTION
2.1.1
MIC38300 Device Features
• 3A Peak Output Current and 2.2A Continuous Operating Current for MIC38300
• Input Voltage Range: 3V to 5.5V
• Adjustable Output Voltage Down to 1V
• Low Output Ripple: Less Than 5 mV
• 70 dB PSRR
• Ultra Fast Transient Performance
• Unique Switcher and LDO Architecture
• Thermal Shutdown and Current Limit
• 4 mm x 6 mm x 0.9 mm MLF Package
2.1.2
MIC38300 Evaluation Board Features
The MIC38300 Evaluation Board was developed to showcase the MIC38300 device's
performances over a wide input voltage range and load current range. The board
comes with a MIC38300 adjustable output voltage, which is set using the divider
network to 1.8V and access is given to the input and output pins, EN pin and Ground
pins. The user can experiment with different output voltage values by changing the
network divider resistor value.
2.2
GETTING STARTED
The MIC38300 Evaluation Board is fully assembled and tested to evaluate and
demonstrate the characteristics of the MIC38300 or the MIC38150 devices.
2.2.1
Powering the MIC38300 Evaluation Board
Apply the positive input voltage to the test point marked as V
IN
and the return ground
connection to the test point marked as GND. The input voltage needs to be a minimum
of 3V in order to test the 1.8V output voltage option (V
IN
= V
R
+ 1.2V). Do not apply a
voltage higher than 5.5V, as the part can be damaged in the process. The MIC38300
device is on, as the default option; being turned on with a pull-up resistor to V
IN
, the
part can be shut down by placing a jumper on the EN connector.
Care should be taken in case of a hot plug at 5.5V. A high ESR capacitor aluminum
electrolytic or tantalum should be placed close to the input pin, in order to prevent
voltage spikes that can damage the part.
The output current capabilities can be tested using resistive loads or an electronic load
set to constant resistance. The positive terminal of the load must be connected to V
OUT
and the negative terminal to the corresponding test point marked with GND.
Note:
Note that an electronic load has the tendency to sink a current when the
output of the LDO is 0V.
