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EVB-EP5368QI

P1-P3P4-P6P7-P7
Enpirion
®
Power Evaluation Board User Guide
EP5368 PowerSoC
Using The External Voltage Divider
The EP5368QI evaluation board is designed to provide a great deal of flexibility in
evaluating the performance of the Altera Enpirion DC/DC module. The external voltage
divider option is chosen by setting the jumpers VS0 – VS2 to a logic “high”.
Pre-tinned pads are provided to place 0805 sized 1% resistors on the board to implement
an external resistor divider for choosing an output voltage other than one of the pre-set
voltages available on the VID. See Figure 3 for the basic circuit.
V
IN
V
Sense
V
in
V
S1
V
S2
V
S0
EP5368QI
Cout
Cin
V
OUT
V
out
GND
ENABLE
R1
R2
V
FB
Figure 3. External divider schematic for the EP5368QI.
The output voltage is selected by the following formula:
( )
2
1
1603.0
R
R
OUT
VV +=
R
1
must be chosen as 200kΩ to maintain control loop stability. Then R
2
is given as:
Ω
−
=
603.0
1603.0
2
OUT
V
R
R
NOTE: Even though it is possible to run the EP5368QI up to 700mA using an
external voltage divider as outlined in the datasheet, this evaluation board is only
configured to run this part up to 600mA. Please contact Altera Power
Applications support if you would like to modify this board to push the output
current up to 700mA.
Page 4 of 7
www.altera.com/enpirion
Enpirion
®
Power Evaluation Board User Guide
EP5368 PowerSoC
Dynamically Adjustable Output
The EP5368QI is designed to allow for dynamic switching between the predefined
voltage levels by toggling the VID pins. The inter-voltage slew rate is optimized to
prevent excess undershoot or overshoot as the output voltage levels transition. The slew
rate is defined in the datasheet.
This feature can be tested by connecting the VSx jumper center pins to logic drivers to
toggle between the various V
OUT
states.
Input and Output Capacitors
The input capacitance is a single 0603 X5R MLCC. Please see the datasheet for the exact
value. There are pre-tinned pads that allows for one additional 0603 capacitor to
experiment with input filter performance.
The output capacitance requirement is a single 0805 X5R MLCC. Please see the
datasheet for the exact value. The board has pre-tinned pads for up to 2 additional 0805
output capacitors.
NOTE: Capacitors must be X5R or X7R dielectric formulations. Do not use Y5V
or any similar dielectric.
Page 5 of 7
www.altera.com/enpirion
Enpirion
®
Power Evaluation Board User Guide
EP5368 PowerSoC
C3
C4 N/U
C10
FB1
C5 N/U
TP2
1
2
TP1
1
2
0805
0603
J1
ASP12192002
1
2
3
5
6
7
9
10
11
13
14
15
17
18
19
Vin
Vout
Vin
TP6
1
TP8
1
TP51
ENABLE
VS0
VS1
VS2
R1
N/U
R2
N/U
J3
1
2
3
LLM
+
C8
U2
N/U
Vin
TP7
1
D1
C1
N/U
C2
0805
0805 0805
0603
0805
U1
Enpirion 3x3 Module
NC(SW)
1
PGND
2
LLM
3
Vfb
4
Vsense
5
AGND
6
VOUT
7
VOUT
8
VS3
9
VS2
10
VS1
11
VS0
12
Enable
13
Vin
14
NC(SW)
15
NC(SW)
16
C9
N/U
0805
0805
VS3
Input Protection
Figure 4: 3x3 Module Evaluation Board Schematic
Note: LLM and VS3
are no-connect (NC)
pins for the EP5368QI.
Page 6 of 7
www.altera.com/enpirion
P1-P3P4-P6P7-P7

EVB-EP5368QI

Mfr. #:
Buy EVB-EP5368QI
Manufacturer:
Intel / Altera
Description:
Power Management IC Development Tools Eval Board EP5368QI 600mA Sync Buck Con
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
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