Enpirion® Power Evaluation Board
EN6310QI 5.5Vin 1A Buck PowerSoC
Evaluat ion Board User G uide
Description
This is the EN6310QI User Guide. The
EN6310QI features an integrated inductor,
power MOSFETS, a controller, a bulk of the
compensation network, and protection circuitry
against system faults. This level of integration
delivers a substantial reduction in footprint and
parts count over competing solutions. The
evaluation board is optimized for engineering
ease of testing through programming options,
clip leads, test points and other supporting
external components.
Evaluation Board Over View
Figure 1. EN6310QI E val uati on B oard Il l ust rat i on
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10621 January 12, 2015 Rev A
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:
CIN = 4.7µF/0603 + 100pF
CAVIN = 20Ω + 0.47µF
COUT = 47µF/0805 or 2x22µF/0603
R
A
= 200kΩ, R
CA
= 1kΩ, R
B
= 0.6R
A
/(V
OUT
– 0.6)
V
IN
(V)
V
OUT
(V)
Ca
(pF)
V
IN
(V)
V
OUT
(V)
Ca
(pF)
5.5
3.3
15
5.5
1.2
27
5
15
5
27
4.5
15
4.5
33
5.5
2.5
15
3.3
33
5
15
2.7
39
4.5
15
5.5
1
39
3.3
15
5
39
5.5
1.8
15
4.5
39
5
15
3.3
47
4.5
15
2.7
47
3.3
22
5.5
0.6
39
2.7
22
5
39
5.5
1.5
22
4.5
47
5 22 3.3 56
4.5 22 2.7 56
3.3
27
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.
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10621 January 12, 2015 Rev A
EN6310QI Ev aluation Board Use r G uide
Bill of Materials
Designator
Qty
Description
R1
1
RE S 10.0 O HM 1/16W 1% 0402 SMD
R2
1
RE S 100K O HM 1/16W 1% 0402 SMD
R4, R8
2
RE S 200K O HM 1/8W 0.1% 0805 S MD
R5
1
1K 1% 0805 C HIP RESISTO R 1/8W
R6
1
RE S 44.2K O HM 1/8W 1% 0805 SMD
R7
1
RE S 100K O HM 1/8W 0.1% 0805 S MD
R9
1
RE S 301K O HM 1/8W 0.1% 0805 S MD
TP2,TP3,TP7,TP8,
TP10-TP12,TP14-
TP16,TP18-TP21
14 TEST PO INT SURFAC E MO UNT
C10
1
CAP C ER 15PF 50V 5% NPO 0402
C1
1
CAP, 10UF 0805 X7R 10% 10V CER AMIC
C2
1
CAP,4.7UF, 0603, 10V, 10%, X5R
C5
1
CAP C ER 47UF 6.3V X5R 0805
C8
1
CAP C ER 10000PF 50V 10% X7R 0805
C9
1
CAPACITOR CER 0.10UF 50V X7R 0402
C11
1
CA P 47UF 16V ELECT FC SMD
D1
1
S2A DIODE
FB1 1
MULTILA YER SMD FER RITE BEAD 4000MA 0805
L = T YPIC AL ( NOT GUARANT E D)
J1
1
TERM BLOCK PCB 2POS 5.0MM GREEN
J2, J3
2
CONNECTOR HEADER 8 POS .100" STR TIN
C3,C6,C12,C13,R3
5
COMPONENT NOT US E D ** DO NOT INSTAL L **
U1
1
G OLD EN 6310QI POL USING 6310-01 DIE 5X4_34L
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10621 January 12, 2015 Rev A
EN6310QI Ev aluation Board Use r G uide
Test Recommend atio ns
To guarantee m eas ur em ent ac c urac y, the follow ing prec autions s hould be obs er ved:
1.
2. Make all input and output voltage m eas urem ents at the boar d us ing the tes t points provided
(TP1 to TP9). This will eliminate voltage drop across the line and load cables that can
produc e fals e r eadings .
3. Meas ure input and output c ur rent w ith s eries am m eters or ac c urate s hunt res is tors . This is
es pec ially im portant w hen m eas uring effic ienc y.
4. Use a low-loop-inductance scope probe tip similar to the one shown below to measure
switching signals and input / output ripple to avoid noise coupling into the probe ground
lead. Input ripple, output ripple, and load transient deviation are best measured near the
respective input / output capacitors. For more accurate ripple measurement, please see
Enpirion App Note regarding this subject.
5. The board inc ludes a pull-up res is tor for the PO K s ignal and ready to m onitor the power O K
s tatus at c lip lead m ar ked PO K.
6. The board includes an enable pin, which tur ns the devic e on when pulled high. When EN is
low , the IC goes into s hutdow n m ode. In “always-on” applications, EN can be tied to VIN.
Contact Information
Altera Corporation
101 Innovation Drive
San Jos e, C A 95134
Phone: 408-544-7000
www.altera.com
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10621 January 12, 2015 Rev A
