The effects of heavy-ion irradiation on the single-event effect performance of the TPS73801-SEP LDO regulator is summarized in this report. Heavy ions up to 43MeV-cm2 / mg were used to irradiate production devices in 17 experiments with fluences of 107 ions / cm2. The results show that the TPS73801-SEP is SEL and SEB free up to 43MeV-cm2/mg across the full electrical specification with upper bound cross section on the 10–7 cm2/device. SETs were characterized at VOUT = 2.5V and 12V; and at VIN = 5V and 15V, respectively. Exclusions greater than ±5% around the nominal voltages, were categorized as an upset. For the SET characterization, only seven upsets were observed on the 16 experiments (or runs) and were all at VOUT = 2.5V. The upper bound cross section for the SETs is on the order of 10–8 cm2 / device.
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The TPS73801-SEP is a radiation hardened, 1A, low dropout (LDO) regulator optimized for fast transient response. At a load of 1A, the device typically features 300mV of dropout. In addition to fast transient response, the LDO features low output noise, making the device designed for sensitive RF applications. Quiescent current is well controlled and does not rise in dropout. Additional features of the device are reverse battery and current protection, thermal shutdown, and current limiting. The device is offered in a plastic 6-pin DCQ (SOT-223) package.
General device information and test conditions are listed in Table 1-1. For more detailed technical specifications, EVM user guides, and application notes, please see the TPS73801-SEP product page
| Generic Part Number | TPS73801-SEP |
|---|---|
| Part Number | TPS73801MDCQTPSEP and TPS73801MDCQPSEP |
| Device Function | Low Dropout (LDO) Voltage Regulator |
| Technology | JI1-Bipolar |
| Exposure Facility | Radiation Effects Facility, Cyclotron Institute, Texas A&M University |
| Heavy-ion Fluence per Run | 1 × 107 ions / cm2 |
| Irradiation Temperature | 25°C and 125°C (for SEL testing) |