MIC7401
EVALUATION BOARD
USER’S GUIDE
2016 - 2018 Microchip Technology Inc.
DS50002723A-page 13
Chapter 2. Installation and Operation
2.1
INTRODUCTION
The MIC7401 Evaluation Board requires only a single power supply between 2.4V and
5.5V with at least 5A of current capability. No external biasing is required to operate the
MIC7401.
Note that the MIC7401 does not have any reverse battery protection. Applying more
than 5.5V on the input or applying a reverse voltage on the input pins may damage the
device.
The MIC7401 Evaluation Board comes preprogrammed with the following voltages:
• Buck regulator 1: 1.8V
• Buck regulator 2: 1.1V
• Buck regulator 3: 1.8V
• Buck regulator 4: 1.05V
• Buck regulator 5: 1.25V
• Boost regulator: 12V
The MIC7401 PMIC on the Evaluation Board has been designed so that the I
2
C pull-up
resistors can be attached to any voltage, including V
IN
and V
USB
. This is done by plac-
ing a jumper between PWR and V
USB
, PWR and V
IN
or by providing the PWR pin with
the desired voltage. If the pull-up resistors are not used (the I
2
C bus interface has other
pull-up resistors), the PWR pin can be left floating.
FIGURE 2-1:
MIC7401 EVALUATION BLOCK DIAGRAM WITH MCP2221
I
2
C BRIDGE
MCP2221
MIC7401
USB
Connector
VUSB
Data
PWR
V
IN
*
* Three way jumper fitted for selection of I
2
C pull-up voltage
** I
2
C bus (SDA, SCL) via MCP2221 USB bridge
V
OUT1-6
PWR
SCL
SDA
**
SCL
SDA
PG
VSLT
STBY
USB-bridge
5x Buck,
1x Boost PMIC
V
IN
V
IN
V
IN
