X R P 6 6 5 8 E V B
1 A 1 . 5 M H z S y n c h r o n o u s S t e p - D o w n C o n v e r t e r
USING THE EVALUATION BOARD
I NITIAL S ETUP
Set the input supply to a voltage between
2.5V to 5.5V and connect it to VIN and GND
connectors on the left side of the evaluation
board. Connect the load to the VOUT and GND
connectors on the right hand side of the
board. Check to make sure that jumper J1 is
set to VIN. The board will power-up and
regulate to the desired output voltage VOUT
set by the feedback resistors. The board will
operate with a load current I OUT of up to 1A
and provide efficiency equal to figures 4 and 5
of XRP6658 datasheet.
J UMPER J1 F UNCTION
Jumper J1 can be used to either short EN pin
to VIN or to GND. The Board is supplied from
EXAR with the jumper set to connect EN to
VIN.
? 2012 Exar Corporation
3/7
Rev. 2.1.0
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