This report presents the effect of neutron displacement damage (NDD) on the TPS7H1101A-SP device. The results show that all devices were fully functional and within production test limits after having been irradiated up to 5× 1012 n/cm2. A sample size of six units was exposed to radiation testing per (MIL-STD-883, Method 1017 for Neutron Irradiation). All devices used in the experiment were from lot date code 2017A and assembly lot 0002938 MMT. Electrical testing was performed at Texas Instruments before and after neutron irradiation using the production test program for 5962R1320201VXC.
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The TPS7H1101A-SP is an improved version of the TPS7H1101-SP, which allows the enable feature to be used across the entire input voltage range. The device is a radiation-hardened LDO linear regulator that uses a PMOS pass element configuration. The device operates over a wide range of input voltage, from 1.5 V to 7 V while offering PSRR. The TPS7H1101A-SP features a precise and programmable foldback current-limit implementation with a wide adjustment range. To support the complex power requirements of FPGAs, DSPs, or microcontrollers, the TPS7H1101ASP provides enable on and off functionality, programmable soft start, current sharing capability, and a power-good open-drain output.
General device information and testing conditions are listed in Table 1-1.
TI Part Number | TPS7H1101A-SP |
---|---|
SMD Number | 5962R13202 |
Device Function | 1.5-V to 7-V
Input, 3-A, Radiation-Hardened LDO Regulator |
Die Name | RTPS7H1X01B1VM |
Technology | LBC7 |
A/T Lot Number / Date Code | 0002938 MMT / 2017A |
Biased Quantity Tested | 0 |
Unbiased Quantity Tested | 6 |
Exposure Facility | VPT Rad |
Neutron Fluence (1 MeV equivalent) | 1.0 ×
1012 n/cm2 5.0 × 1012 n/cm2 |
Irradiation Temperature | 25°C |
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The TPS7H1101A-SP was electrically pre-tested using the production automated test equipment program. General test procedures were IAW MIL-STD-883, Method 1017 for Neutron Irradiation of TPS7H1101A-SP as listed in Table 2-1.
Group | Sample Quantity | Neutron Fluence (n / cm2) | Bias |
---|---|---|---|
A | 3 | 1.0 × 1012 n / cm2 | Unbiased |
B | 3 | 5.0 × 1012 n / cm2 | Unbiased |