The purpose of this study is to characterize the single-event-effects (SEE) performance due to heavy-ion irradiation of the TPS7H4010-SEP. SEE performance was verified at two common output voltage rails of 1.8V and 3.3V. Heavy-ions ranging from an LETEFF of 1.33 to 43 MeV·cm2/mg were used to irradiate 10 production devices. Flux of ≈104 and 105 ions/cm2 ·s and fluences of ≈106 and 107 ions/cm2 per run were used for the characterization. The results demonstrated that the TPS7H4010-SEP is SEL and SEB/SEGR-free up to 43 MeV·cm2/mg, at T = 125°C and T = 10°C, respectively, and across the full electrical specifications. SET and SEFI performance for output voltage excursions ≥ |3%| from the nominal voltage and PGOOD ≤ VOUT/2 are presented and discussed.
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The TPS7H4010-SEP is a space-enhanced-plastic, 3.5V to 32V input, 6A, synchronous step-down voltage converter. The device provides exceptional efficiency and output accuracy in a very small solution size. Peak current-mode control is employed. Additional features such as adjustable switching frequency, synchronization to an external clock, FPWM option, power-good flag, precision enable, adjustable soft start, and tracking provide both flexible and easy-to-use solutions for a wide range of applications.
The TPS7H4010-SEP requires few external components and has a pinout designed for simple PCB layout with optimal EMI and thermal performance. Protection features include thermal shutdown, input undervoltage lockout, cycle-by-cycle current limiting, and hiccup short-circuit protection. The device is offered in a 30-pin WQFN plastic package. General device information and test conditions are listed in Table 2-1. For more detailed technical specifications, user-guides, and application notes please go to TPS7H4010-SEP product page.
| DESCRIPTION(1) | DEVICE INFORMATION |
|---|---|
| TI Part Number | TPS7H4010-SEP |
| Orderable Number | TPS7H4010MRNPTSEP |
| Device Function | Point-of-load (POL) Switching Regulator |
| Technology | Linear BiCMOS 8 (LBC8 ) |
| Exposure Facility | Radiation Effects Facility, Cyclotron Institute, Texas A&M University (25 MeV/nucleon) |
| Heavy Ion Fluence per Run | 5.65 × 105 – 1 × 107 ions/cm2 |
| Irradiation Temperature | 10°C (for SEB/SEGR testing), 25°C (for SET testing), and 125°C (for SEL testing) |
