EN6310QI Ev aluation Board Use r G uide
Instructions
The numbers in the instructions below corr espond
to the num bers in Figure 1. By following the num be r
sequence below, the device can be turned on by
step 5.
1) ENABLE (J1) – Connecting a jumper to the
upper two pins of J1 enables the device.
Connecting a jumper on the lower two pins
of J1 disables the device. Leave J1 open
and use an external signal on TP8 to toggle
the enable on (>1.8V) and off (<0.4V).
2) Output Voltage Settings (J4) – With a
jumper placed as shown, output voltage is
set to 1.2V. The jumper may be switched to
change the output voltage fro m left to right
(3.3V, 1.8V, 1.2V and 1.0V). The output
voltage may also be adjusted by changing
RB (R4) as shown in Figure 2.
V
OUT
VOUT
PGND
VFB
R
A
R
B
R
CA
C
A
C
OUT
R
A
V
FB
V
FB
V
OUT
x-
=
V
FB
= 0.6V
EN6310QI
Figure 2. External Compensation
3) VIN (TP18) – Connect the positive terminal
of a 2.7V to 5.5V power supply to TP18. Do
not turn the power supply on until everyth in g
is connected correctly.
4) Ground (TP20 and TP21) – Connect the
power supply’s negative terminal ground to
TP20 and the load ground to TP21.
5) VO UT ( TP19) – Connect the load to TP19.
If the instructions were followed up to this
point, the power supply m ay be turned on. If
output voltage is not present after turnin g o n
the power supply, check the position of the
jumper on J1.
6) POK (TP10) – This is the open drain POK
flag, which is pulled up to VIN by R1 when
VOUT is over 90% of regulation.
7) SS (TP11) – The soft start capacitor is by
defaulted 10nF and can be between 0.47nF
to 10nF. See Datasheet for details.
8) External Compensation (R4 = Ra), C10 =
Ca, R5= Rca) – The on board values are
designed to work with a variety of input and
output voltage ranges. For optimization,
follow the table below:
COUT = 47µF/0805 or 2x22µF/0603
A
CA
B
A
OUT
IN
OUT
IN
OUT
3.3
1.2
2.5
1
1.8
0.6
1.5
5 22 3.3 56
4.5 22 2.7 56
2.7 33
9) Input Protection – The EN6310QI
evaluation board comes with some input
polarity protection. Be sure to follow input
voltage specifications based on the
Datasheet.
www.altera.com/enpirion, Page 2
10621 January 12, 2015 Rev A