Nuclear Techniques ›› 2020, Vol. 43 ›› Issue (7): 70501-070501.doi: 10.11889/j.0253-3219.2020.hjs.43.070501


Study of neutron irradiation effects on bipolar linear regulator

Cai LI1,Yiyuan WANG2,Jiantou GAO3,Shuai CUI1,Bin CHEN1,Chunlin WANG2   

  1. 1.Innovation Academy for Microsatellites of Chinese Academy of Sciences,Shanghai 201203,China
    2.Shanghai Institute of Aerospace System Engineering,Shanghai 201109,China
    3.Institute of Microelectronics of Chinese Academy of Sciences,Beijing 100029,China
  • Received:2020-04-07 Revised:2020-06-10 Online:2020-07-15 Published:2020-07-16
  • About author:LI Cai, female, born in 1986, graduated from Tongji University with a master's degree in 2010, focusing on space radiation assessment techniques and applications

Abstract: Background

Bipolar linear voltage regulator is widely used in space equipment, its displacement effect needs to be evaluated due to neutron irradiation in space environment.


This study aims at the neutron irradiation effect of bipolar linear voltage regulator under different load bias.


Neutron irradiation test was carried out on bipolar linear voltage regulators. Different load biases were applied to the components to monitor the changes of online output voltage during irradiation. Output voltage of the component was tested after irradiation under different load currents, and compared with the output voltage during online radiation test.


The output voltage during irradiation decreases with the influence of the neutron, the greater the load, the more obvious the displacement damage effect. Detailed component tests under different loads after irradiation show that the difference of output voltage under different bias voltages was caused by different loads.


The irradiation bias has no significant effect on the displacement of the bipolar linear regulator, and the driving capability of the bipolar linear regulator reduces severely due to the neutron displacement effect, which makes it lose the load adjustment capacity. Therefore, the load should be reasonably selected for evaluation in accordance with application requirements of engineering evaluation.

Key words: Bipolar linear regulator, Neutron irradiation, Displacement effect, Output voltage

CLC Number: 

  • TM44