EVAL-ADP1864_15 Datasheet, PDF (9/16 Pages) Analog Devices – Evaluation Board for ADP1864 with Web Design Tool

As a general guideline, it is recommended to set this value
around 5%. In the next pull-down menu (Ioutstep), the user
can select the estimate of the largest step in load the regulator
will demand. This, in conjunction with the allowable voltage
excursion on load transient (in the Vout step error pull-down
menu), delegates how much output capacitance is required. If
the Ioutstep specification is not known, entering a 50% load
step provides an adequate design for most applications at the
power level the ADP1864 is designed to be used.
SELECT COMPONENT VALUES AND SIZES
When starting a new design, it is recommended to reset each of
the pull-down menus to Auto, which is at the top of the list for
each option. With these settings, the tool automatically calculates
the most efficient design and provides that solution. If the user
would like to explore how other components affect various
parameters of the system, all the parts of the regulator except
the compensation components can be changed through the use
of the pull-down menus in this section. Note that the tool provides
a bill of materials that maintains all specifications entered in the
Enter Performance Specifications section of the tool when a
component is changed. Accordingly, other component values
can change as well. The feedback resistor selector at the bottom
of this section finds the right combination of resistors to
provide the feedback voltage with the 0.8 V.
EVAL-ADP1864
POWER DISSIPATION AND TEMPERATURE
The Power Dissipation and Temperature section of the tool
provides the user with the power dissipation of each part at the
full rated current at both the maximum and minimum input
voltages. It also provides the user with the estimated temperature
of the ADP1864, the MOSFET, the diode, and the inductor. These
calculations are done taking into account the temperature rise
due to dissipation as well as the ambient temperature.
EFFICIENCY
From the power dissipation information calculated in the
Power Dissipation and Temperature section of the tool, the
efficiency across the full load range is plotted for both
maximum and minimum input voltages.
APPLICATION SCHEMATIC
The Application Schematic section provides a schematic of the
ADP1864 evaluation board. The reference designators on the
evaluation board match this schematic.
BOM SUMMARY
The BOM Summary provides the user with the final parts
list necessary to meet all the requirements entered into the
performance specifications section. Vendors, part numbers,
individual and total area, along with a value for each component,
are provided. If no part number is provided, a vital specification
is given instead. This specification can be used to find a part to
populate on the board. From this BOM, the user can modify the
fully populated configuration or populate the bare board
configuration to validate design changes.
Rev. C | Page 9 of 16