LSO2805S Datasheet, PDF (7/18 Pages) International Rectifier – HYBRID-HIGH RELIABILITY RADIATION HARDENED DC-DC CONVERTER

LSO SERIES
28V Input, Single/Dual Output
Notes for Electrical Performance Characteristics Table
1. Parameter is tested as part of design characterization or after design changes. Thereafter, parameter
shall be guaranteed to the limits specified.
2. Parameter verified during line and load regulation tests.
3. Output load current must be distributed such that at least 20% of the total load current is being provided by
one of the outputs.
4. Load current split equally between outputs on dual output models.
5. Cross regulation is measured with 20% rated load on output under test while changing the load on the
other output from 20% to 80% of rated.
6. Guaranteed for a D.C. to 20MHz bandwidth. Tested using a 20KHz to 10MHz bandwidth using the circuit
shown in Fig.1.
7. Capacitive load may be any value from 0 to the maximum limit without compromising dc performance. For
a capacitive load in excess of the maximum limit, consult the factory.
8. Overload power dissipation is defined as the device power dissipation with the load set such that VOUT =
90% of nominal.
9. Load step transition time ≤ 10µs.
10. Recovery time is measured from the initiation of the transient to where VOUT has returned to within ±1% of
its steady state value.
11. Line step transition time ≤ 100µs.
12. Turn-on delay time from either a step application of input power or a logic low to a logic high transition on
the inhibit pin (pin 3) to the point where VOUT = 90% of nominal.
13. End of ife (EOL) is ±3%
14. MIL-HDBK MOSFET failure rates replaced by empirical failure rate data supplied by Intenational Rectifier.
Fig. 1 - Circuit for measuring Output Ripple Voltage
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Radiation Performance Characteristics
Test Inspection
Method
Min Typ
Unit
MIL-PRF-883, Method 1019
Total Ionizing Dose (Gamma) Operating bias applied during exposure, 100 150
Krads(Si)
Full Rated Load, V_IN = 28V
Heavy Ions (LET)
Single Event Effects
Operating bias applied during exposure,
SEU, SEL, SEGR, SEB
Full Rated Load, V_IN = 28V
82
Test lab: Cyclotron Institute
MeVxcm²/mg
Texas A & M University
www.irf.com
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