vpr Power Your Critical Mission Today Models Available Input: 18 V to 40 V continuous, 50 V transient 40 W, dual outputs of ±5 V, ±12 V, ±15 V Qualified to MIL-PRF-38534 Class H and Class K Designed for TOR Compliance 1.0 DESCRIPTION The SVRTR Series of space qualified DC-DC converters is specifically designed for the harsh radiation environment of space applications and is designed in accordance with Aerospace TOR requirements. Performance is guaranteed through the use of hardened semiconductor components, radiation lot acceptance testing (RLAT) of non-hardened components, and analysis. The SVRTR Series has been characterized for Total Ionizing Dose (TID) performance including Enhanced Low Dose Rate Sensitivity (ELDRS) and for Single Event Effects (SEE) according to VPT's DLA-approved Radiation Hardness Assurance (RHA) plan per MIL-PRF-38534, Appendix G, Level R. Characterization is performed at both the component level and at the SVRTR Series hybrid converter level. The SVRTR Series of DC-DC converters is radiation hardened and suited for use in low Earth orbit (LEO), medium Earth orbit (MEO), geostationary orbit (GEO), deep space, and launch vehicle programs. 1.1 FEATURES • Up to 40 W output power • Wide input voltage range: 18 V to 40 V plus 50 V transient • Continuous operation over full military temperature range of -55 °C to +125 °C with no power derating • Very low output noise • Radiation immune magnetic feedback circuit • No use of optoisolators • Undervoltage lockout • Current limit protection / short circuit protection 1.2 SPACE LEVEL CHARACTERIZATIONS • Guaranteed TID performance to 100 krad(Si) including ELDRS • SEE performance to 85 MeV/mg/cm2. Transients are fully characterized for cross section and magnitude • Worst-case analysis, stress, radiation, reliability reports available 1.3 MANUFACTURING AND COMPLIANCE • Qualified to MIL-PRF-38534 Class H and Class K, DLA SMD # 5962-13210 • Available compliant to MIL-HDBK-1547 and Aerospace TOR component level element evaluation • MIL-PRF-38534 element evaluated components • MIL-STD-461 C/D/E/F when used with appropriate VPT EMI filter • Manufactured in a MIL-PRF-38534 Class H and Class K facility • MIL-STD-883 • ISO-9001 1.4 PACKAGING • Low-profile: 2.890” x 1.125” x 0.405” • Max weight: 55 g • Industry standard pinout • Precision seam-welded hermetic metal case • Flanged and Non-flanged versions available 1.5 SIMILAR PRODUCTS AND ACCESSORIES • SVRTR 40 W single output DC-DC converter • SVTR 40 W space qualified DC-DC converter, 30 krad(Si) • Custom versions available • EMI filters • Non-isolated, space qualified point of load converters • Use with Thermal Pad TP-003 Products and reports described in this datasheet are subject to all export license restrictions and regulations which may include but are not limited to ITAR (International Traffic in Arms Regulations) and the Export Administration and Foreign Assets Control Regulations. Further restrictions may apply. Contact VPT sales for details. O-O

SVRTR2800D Series 2.0 DIAGRAMS 2.1 BLOCK DIAGRAM D2 +VOUT C3 UNDER VOLTAGE SHUTDOWN MAGNETIC FEEDBACK PRIMARY HOUSEKEEPING SUPPLY VOLTAGE AND CURRENT AMPLIFIERS SECONDARY HOUSEKEEPING SUPPLY LOAD -VOUT 3.0 SPECIFICATIONS 3.1 ABSOLUTE MAXIMUM RATINGS Absolute Maximum Ratings Input Voltage (Continuous): Input Voltage (Transient, 1 second): ESD Rating per MIL-PRF-38534: Sales Information Operating Temperature (Full Load): Storage Temperature: Lead Solder Temperature (10 seconds):

vpr Power Your Critical Mission Today Tcase = -55 °C to +125 °C, Vin = +28 V ± 5%, Full Load1, Unless Otherwise Specified 5. End-of-Life performance includes aging and radiation degradation and is within standard limits except where noted 6. Correction factor of 0.12 added to ceramic capacitors 7. 37.5 V Max continuous to be compliant to MiL-HDBK-1547 and Aerospace TOR 8. 5% Load to Full Load at -55°C Sales Information Phone:(425) 353-3010 Fax: (425) 353-4030E-mail: [email protected] Web: www.vptpower.com 1 Half load at +Vout and half load at -Vout Up to 60% of the total power or current...

vpr Power Your Critical Mission Today SVRTR2800D Series3.2 PERFORMANCE SPECIFICATIONS (CONTINUED) Tcase = -55 °C to +125 °C, Vin = +28 V ± 5%, Full Load1, Unless Otherwise Specified 5. End-of-Life performance includes aging and radiation degradation and is within standard limits except where noted 6. Correction factor of 0.12 added to ceramic capacitors 7. 37.5 V Max continuous to be compliant to MiL-HDBK-1547 and Aerospace TOR 8. 5% Load to Full Load at -55°C O Sales Information Phone:(425) 353-3010 Fax: (425) 353-4030E-mail: [email protected] Web: www.vptpower.com 1 Half load at +Vout and...

SVRTR2800D Series 4.0 PERFORMANCE CURVES 4.1.1 SVRTR2805D Efficiency (Typical, 25 °C) Sales Information

SVRTR2800D Series 5.0 MECHANICAL OUTLINES AND PINOUT Non-Flanged Package Option: 0.260in±0.025 BASEPLATE SURFACE 1. Tolerances are +0.005” unless otherwise stated 2. Case temperature is measured on the center of the baseplate surface 3. Materials: Case (Steel, gold over nickel plated); Cover (Kovar, nickel plated); Pin (Copper-cored alloy 52, gold over nickel plated); Pin Seals (Ceramic) Sales Information

SVRTR2800D Series 5.0 MECHANICAL OUTLINES AND PINOUT (CONTINUED) Flanged Package Option: 2.890in 73.41mm MAX 2.550in 64.77 Tolerances are +0.005” unless otherwise stated Case temperature is measured on the center of the baseplate surface Mounting holes are not threaded. Recommended fastener is 6-32 Materials: Case (Steel, gold over nickel plated); Cover (Kovar, nickel plated); Pin (Copper-cored alloy 52, gold over nickel plated); Pin Seals (Ceramic) Sales Information

SVRTR2800D Series 6.0 TECHNICAL NOTES Please note that many of these functions are also demonstrated in detail on the VPT website in the form of technical video labs. 6.1 GENERAL INFORMATION 6.1.1 Topology Description The SVRTR2800D Series is an isolated dual-output flyback converter. It provides a positive and negative output voltage with respect to the OUTCOM pin. Up to 60% of the total output power is available from either output. The internal voltage regulation loop actively regulates the positive output using VPT’s proprietary magnetic feedback technology. The negative output is regulated...