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Sachs et. al. IEEE Trans. Nuclear Science NS-31, 1249 (1984)

Threshold Shift vs Gate Oxide Thickness. Poly- Si Gate. SiO 2. Si. +. +. +. +. +. +. +. +. +. +. +. +. e --. e --. +. +. +. +. +. +. +. +. Tunneling Region. +. +. +. +. Hole removal process by tunneling in thin-oxide MOS Structures. Dosage = 150 Krads.

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Sachs et. al. IEEE Trans. Nuclear Science NS-31, 1249 (1984)

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  1. Threshold Shift vs Gate Oxide Thickness Poly- Si Gate SiO2 Si + + + + + + + + + + + + e-- e-- + + + + + + + + Tunneling Region + + + + Hole removal process by tunneling in thin-oxide MOS Structures Dosage = 150 Krads Sachs et. al. IEEE Trans. Nuclear Science NS-31, 1249 (1984) Book. Timothy R Oldham “Ionizing Radiation Effects in MOS Oxides” 1999 World Scientific

  2. Enpirion EN5360 With Integrated Inductor Found out at Power Technology conference 0.25 µm Lithography • Irradiated Stopped on St. Valentines Day 2007 • We reported @ TWEPP 2008 - IHP was foundry for EN5360

  3. Twepp Nagos

  4. Is there a Commercial product available ? • Yes = It is the EN5360 • Satellite folks are using it now • sLHC Levels – 100 Mrads • Use for voltage ratio = 4 • Work at Super LHC levels for Tracker • 5.5 V in > 1.3 out • Enpirion is still supplying these to a very large customer • IHP foundry will make it for many years. • Can purchase in Die form for use with Air coil For Purchasing EN5360: Steve Robb (908) 894 -6083 srobb@enpirion.com Tom Howell (908) 894-6029 thowell@enpirion.com

  5. 4 Wire Current shunt 4 Wire Current shunt DC-DC Converter Voltage ratio = 8/10 Load: Rated Current or maximum without cooling ~ 1 amp Setup for 4 EVAL Boards Measure Bias Current with Load disconnected Power Supply V out > 5 – 20 Volts ~ 0.5 Amps . VInput 5.5 V max to prevent damage. GND V Output Monitor 2 wire Differential Twisted Pair Preferred V Input Monitor. 2 Wire Differential Agilent 34970A & Multiplexer 33901A to Monitor I & V Buck Regulator Eval Board Size = 3 inch x 3.5 inch Twisted Pair Preferred Solder all wires ???? V Output Monitor 2 wire Differential Load Resistor = 0.3 to 1.5 Ώ 1 to 5 Amps . GND V Output = 1.5 V . Switch on/off V Output Monitor 2 wire Differential Line Drop ~ 0.25 volts @ 6 amps in each Leg ??? Banana Jacks / Solder Wires Satish Dhawan, Yale University DC-DC Regulator Setup for Radiation Exposure April 21. 2008

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