USER’S MANUAL
AN1732
Rev.1.00
December 6, 2016
ISL70002SEHEVAL1Z
Evaluation Board
AN1732 Rev.1.00
Page 1 of 13
December 6, 2016
Circuit Comments
The ISL70002SEHEVAL1Z evaluation board is designed to
demonstrate the features of the
, a TID and SEE
hardened 12A synchronous buck regulator IC with integrated
MOSFETs intended for space applications. For more detailed
information about the ISL70002SEH, refer to the
datasheet.
The ISL70002SEHEVAL1Z evaluation board accepts a nominal
3V to 5.5V input voltage and provides a regulated output
voltage ranging from 0.8V to 85% of the input voltage at
output currents ranging from 0A to 12A. The output can be
quickly set to a preset voltage of 1.0V, or adjusted to an
alternate voltage using the onboard potentiometer. A
Power-Good (PGOOD) signal goes high and lights a red LED to
indicate that the output voltage is within a ±11% typical
regulation window. A toggle switch is provided to conveniently
enable or disable the output voltage.
The ISL70002SEHEVAL1Z evaluation board can be set to run
from the nominal 500kHz or 1MHz internal oscillator of the
ISL70002SEH or synchronized to a 500kHz to 1MHz ±20%
external clock. Two ISL70002SEH ICs can be synchronized to
each other in a master/slave configuration, providing nearly
twice the output current while switching 180° out-of-phase
with respect to each other. See
, “Dual Phase Current
Share Evaluation Board User Guide”.
Related Literature
• For a full list of related documents, visit our website
-
product page
Schematic and BOM
A photograph, schematic, and BOM of the
ISL70002SEHEVAL1Z evaluation board are shown in
,
, and
, respectively. The
schematic indicates the test points, which allow many nodes
of the evaluation circuit to be monitored directly. The BOM
shows components that are representative of the types
needed for a design, but these components are not
space-qualified. Equivalent space-qualified components would
be required for flight applications. A 1µH inductor is
recommended for 500kHz and a 500µH inductor is
recommended for 1MHz.
Recommended Test Equipment
• A 0V to 6V power supply with at least 20A current capability
• An electronic load capable of sinking current up to 12A
• Two Digital Multimeters (DMMs)
• A 500MHz dual-trace oscilloscope
Ordering Information
PART NUMBER
DESCRIPTION
ISL70002SEHEVAL1Z ISL70002SEHEVAL1Z Evaluation Board
FIGURE 1. ISL70002SEHEVAL1Z TOP VIEW
