2013 Microchip Technology Inc.
DS50002111A-page 13
MCP16311/2 SYNCHRONOUS BUCK
CONVERTER EVALUATION BOARD
USER’S GUIDE
Chapter 2. Installation and Operation
2.1
INTRODUCTION
The MCP16311/2 device is capable of regulating the output voltage over a wide 2V to
15V range, and typically can deliver over 1A of load current at 3.3V output when
supplied from a 12V input. The input voltage range is 4V to 30V. The regulated output
voltage (V
OUT
) should be lower than the input voltage (V
IN
).
FIGURE 2-1:
MCP16311/2 Synchronous Buck Typical Application.
The MCP16311/2 Synchronous Buck Converter Evaluation Board offers both package
types in two buck-converter applications for 3.3V and 5.0V output voltage options. The
output voltage can be modified by changing the resistors in the feedback loop based
on the formula in Figure 2-1.
GND
V
IN
_
+
U
1
EN
3
V
IN
4
V
CC
2
A
GN
D
8
P
GN
D
5
BOOST
7
SW
6
V
FB
1
GND
–
V
OUT
+
C
2
10 µF
C
3
10 µF
C
VCC
1 µF
C
5
10 µF
C
6
10 µF
C
1
0.1 µF
L
1
R
T
R
B
R
EN
1M
Note:
Calculate RT resistors for a particular V
OUT
as:
V
FB
= 0.8V (for
MCP16311/2
)
For the inductor value, see
.
R
T
R
B
V
OUT
V
F B
-------------
1
–
=
