EN5367QI
Evaluation Board User Guide
Jan. 2012
Page 1 of 8
Enpirion EN5367QI DC-DC Converter
w/Integrated Inductor Evaluation Board
Introduction
Thank you for choosing Enpirion, the source for ultra small foot print power converter
products! This evaluation board user guide applies to EN5367QI. The EN5367QI is a 6A
device. In addition to this document, you will also need the latest device datasheet.
•
The EN5367QI features integrated inductor, power MOSFETS, 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 etc.
•
The EN5367QI features a customer programmable output voltage by means of a
resistor divider. The resistor divider allows the user to set the output voltage to
any value within the range 0.75V to (V
IN
-V
DROPOUT
). The evaluation board, as
shipped is populated with a 4 resistor divider option. The upper resistor is fixed
and has a phase lead capacitor in parallel. One of 4 lower resistors is selected
with the jumper option for different output voltages to change V
OUT
, retain the
upper resistor and capacitor values and change only the lower resistor.
•
This device has no over-voltage protection feature. If making modifications to the
board, we strongly recommend the customer to ensure the feedback loop is truly
closed before powering up the device especially if the load can not withstand the
input voltage.
•
The input and output capacitors are X5R or X7R multi-layer ceramic chip
capacitors. The Soft-start capacitor is a small 47nF X7R MLCC. Pads are
available to have multiple input and output capacitors. This allows for evaluation
of performance over a wide range of input/output capacitor combinations.
•
The jumper labeled LLM/SYNC pin controls the SYNC pin. LLM (light-load mode)
function is not available on this part. This pin should be pulled LOW if the SYNC
function is not to be used. Do not leave this pin floating or high.
•
The jumper labeled VDROOP should be left grounded. This function is not
available on this part.
•
Clip-on terminals are provided for POK, and ENA, pins.
