Micrel, Inc.
MIC4724YMME Evaluation Board
Output Voltage
The output voltage on the MIC4724 evaluation board
is adjustable. The output voltage is controlled by the
feedback resistors (R1 and R2) and can be calculated
as follows:
⎟
⎠
⎞
⎜
⎝
⎛ +
×
=
R2
R1
1
V
V
REF
OUT
Where V
REF
= 1V.
The evaluation board is preset at 1.8V, but can
easily be modified by removing R2 and replacing it
with the value that yields the desired output voltage.
(Removing R2 sets the output to 1V).
REF
OUT
REF
V
V
V
R1
R2
−
×
=
For V
REF
= 1V, this reduces to:
1
V
R1
R2
OUT
−
=
Power OK
The POK pin is pulled up to V
IN
through a pull-up
resistor and is asserted low when V
OUT
is within the
regulation band. An external connection on the
board provides easy access to the POK pin.
Ordering Information
Part Number
Description
Package
MIC4724YMME IC
10-Pin MSOP
EPAD
MIC4724YMME EV
Evaluation Board
10-Pin MSOP
EPAD
June 2008
2
M9999-062408-A
