Microchip Technology MCP16311/2, User Manual

Page: 15 / 22

Installation and Operation

2013 Microchip Technology Inc. DS50002111A-page 15
FIGURE 2-2: MCP16311/2 Synchronous Buck Converter Evaluation Board
Setup.
2.3.1.3 ADJUSTABLE V
OUT
SETTING
The resistor divider RT and RB are used to set the converter output voltage. If the
output voltage is modified by changing the feedback resistors, the inductor should also
be changed. Check Table 2-1 for the value of the inductor or the MCP16311/2 data
sheet for more information. The output voltage can be calculated using the following
equation:
TABLE 2-1: RECOMMENDED INDUCTOR VALUES
V
OUT
Inductor Value
2.0V 10 µH
3.3V 15 µH
5.0V 22 µH
12V 56 µH
15V 68 µH
12V DC
Power Supply
Resistive Load
33

/1W
V-meter
12V DC
Power Supply
Resistive Load
50

/1W
V-meter
R
T
R
B
V
OUT
V
FB
-------------
 
 
1 –

=
Where:
V
FB
= 0.8V