ISSN 10637397, Russian Microelectronics, 2015, Vol. 44, No. 1, pp. 44–48. © Pleiades Publishing, Ltd., 2015.
Original Russian Text © L.N. Kessarinskiy, A.Y. Borisov, D.V. Boychenko, A.O. Akhmetov, 2015, published in Mikroelektronika, 2015, Vol. 44, No. 1, pp. 54–58.
The determination of the parameters of resistance
of modern analogue microcircuits to single effects
from heavy charged particles (HCPs) is now one of the
burgeoning research fields in radiation studies [1–4].
In the majority of cases, the engineers who design
space equipment and set the requirements are only
interested in irreversible effects (the thyristor effect
and catastrophic faults). It is assumed that single event
transients (SETs) at the outputs of analog microcir
cuits pose less danger to the equipment operation in
general due to their short characteristic durations.
Hybrid pulse voltage converters (DCDC) nor
mally provide stabilized voltage supply for a single
functional unit of space equipment or several such
units. Thus, SETs at a DCDC output may disrupt the
operation of entire units of space equipment. The
authors of  placed emphasis on modeling the single
effects from HCPs in DCDCs and detailed the results
of the experimental studies of the thyristor effect and
catastrophic faults in DCDCs.
The present study was aimed at analyzing the quan
titative and qualitative SET characteristics in hybrid
DCDCs based on the results of the experimental stud
ies, revealing the principal trends, and formulating rec
ommendations for choosing the DCDC electric regime
in the tests for HCP resistance with respect to SETs.
2. DESCRIPTION OF THE EXPERIMENT
AND THE TEST OBJECT
The experimental studies were conducted at the
U400M heavy ion cyclotron (Joint Institute for
Nuclear Research, Dubna) that yielded irradiating
argon (Ar), krypton (Kr), and xenon (Xe) ions with
characteristic free path lengths in silicon of 35–45
Three main difficulties arise in the experimental stud
ies of SETs in analog microcircuits with the use of
shortrange ions. The first difficulty is related to the
necessary use of an automated testandmeasurement
system that is capable of detecting SETs with widely
varying durations (from several hundreds of nanosec
onds to several seconds) and may be operated remotely
(for radiation safety reasons). The second problem is
associated with the short free path length of the parti
cles used and, consequently, the need to decapsulate
the samples without compromising their operation.
The third problem is related to the correct choice of a
test object that (in order to achieve reliable detection
of SETs) should not exhibit the thyristor effect and
catastrophic faults under irradiation with HCPs.
The first problem was solved by constructing an
automated testandmeasurement system based on
module instruments of the PXI standard. This system
is described in detail in . The second and the third
problems were solved by choosing the right test object:
the 5107SES05 hybrid DCDC produced by Modu
lar Devices (United States). The upper part of the
metallic casing was removed completely without com
promising the sample operation. The studies showed
that this DCDC exhibits no thyristor effect and cata
strophic faults under irradiation with the chosen ions.
The 5107SES05 voltage stabilizer has an operating
input (supply) voltage range of 16–50 V and should
produce a stabilized output level of 5 ± 0.1 V within
this range at load currents varying from 0 to 4 A. Figure 1
shows the photographs of exposed samples prepared
for irradiation in the vacuum chamber of the U400M
cyclotron ion guide.
Electric Regime Influence on the DCDC Converters’s Hardness
to Single Event Transients
L. N. Kessarinskiy
, A. Y. Borisov
, D. V. Boychenko
, and A. O. Akhmetov
National Research Nuclear University MEPhI (Moscow Engineering Physics Institute) Moscow, Russia
JSC Specialized Electronic Systems (SPELS), Moscow, Russia
email: firstname.lastname@example.org, email@example.com, firstname.lastname@example.org, email@example.com
Received May 20, 2014
—The influence of the electric operating regime of hybrid pulse DCDC converters on the number
of single event transient and, consequently, the sensetive parameters is analyzed. The predicted dependence
of the singleeffect characteristic in hybrid stabilizers on the electric regime in general and the feedback per
formance in particular is confirmed experimentally. The recommendations for carrying out the certification
tests for the sensetive of hybrid voltage stabilizers to single effects are outlined.