PD-94549C ATR28XXS SERIES 28V Input, Single Output HYBRID - HIGH RELIABILITY DC-DC CONVERTER Description The ATR28XXS Series of DC-DC converters feature high power density and an extended temperature range ATR for use in military and industrial applications. Designed to MIL-STD-704D input requirements, these devices have nominal 28VDC inputs with 3.3V, 5V, 12V and 15V single outputs to satisfy a wide range of requirements. Features The circuit design incorporates a pulse width modulated single forward topology operating in the feed-forward 16V to 40VDC Input Range (28VDC Nominal) mode at a nominal switching frequency of 550KHz. 3.3V, 5V, 12V and 15V Outputs Available Input to output isolation is achieved through the use of Indefinite Short Circuit and Overload transformers in the forward and feedback circuits. Protection 3 Up to 35W/in Power Density The advanced feedback design provides fast loop 30W Output Power Models response for superior line and load transient characteristics Fast Loop Response for Superior Transient and offers greater reliability and radiation tolerance Characteristics than devices incorporating optical feedback circuits. Operating Temperature Range from -55C to +125C Three standard temperature grades are offered with Popular Industry Standard Pin-Out screening options. Refer to Part Number section. These Resistance Seam Welded Case for Superior devices can be provided in a standard plug-in package Long Term Hermeticity for PC mounting or in a flanged package for more Ceramic Feed-thru Pins severe environments. External Synchronization Efficiencies up to 84% Manufactured in a facility fully qualified to MIL-PRF- Shutdown from External Signal 38534, these converters are fabricated utilizingDLA Military Screening Land and Maritime qualified processes. For available Standard Microcircuit Drawings Available screening options, refer to device screening table in the data sheet. Variations in electrical, mechanical and screening can be accommodated. Extensive computer simulation using complex modeling enables rapid design modification to be provided. Contact IR San Jose with specific requirements. www.irf.com 1 ATR28XXS Series Specifications ATR2803R3S Absolute Maximum Ratings Input voltage -0.5V to +50VDC Soldering temperature 300C for 10 seconds Operating case temperature -55C to +125C Storage case temperature -65C to +135C Table I. Electrical performance Characteristics Test Symbol Conditions Group A Device Limits Units -55C TC +125C Subgroups Types V = 28VDC 5%, C = 0 IN L Min Max Unless otherwise specified Output voltage V I = 0 1 01 3.25 3.35 V OUT OUT 2,3 3.20 3.40 1 I V = 16, 28, and 40 VDC 1,2,3 01 7500 mA Output current OUT IN 2 Output ripple voltage V V = 16, 28, and 40 VDC 1,2,3 01 60 mV p-p RIP IN B.W. = 20Hz to 2 MHz 3 VR V = 16, 28, and 40 VDC 1 01 20 mV Line regulation LINE IN I = 0, 3000, and 6000mA OUT 2,3 30 3 VR V = 16,28, and 40 VDC 1,2,3 01 50 mV Load regulation LOAD IN I = 0, 3000, and 6000mA OUT Input current I I = 0, inhibit (pin 2) 1,2,3 01 18 mA IN OUT Tied to input return (pin 10) I = 0, inhibit (pin 2) = open 50 OUT 2 I I =6000mA 1,2,3 01 50 mA p-p Input ripple current RIP OUT B.W. = 20Hz to 2 MHz Efficiency E I=6000mA 1 01 74 % FF OUT 2,3 70 Isolation ISO Input to output or any pin 1 01 100 M to case (except pin 8) at 500 VDC, TC =+25 C 4, 5 C No effect on dc performance 4 01 500 F Capacitive load L TC =+25C 6 Power dissipation P 1 12 D Overload, TC = +25C load fault 01 W Short Circuit 1,2,3 9.0 Switching frequency F I = 7500mA 4,5,6 01 500 600 KHz S OUT Sync frequency range F I = 7500mA 4,5,6 01 500 700 KHz SYNC OUT Output response to step VO Load step 50% to/from 100% 4,5,6 01 -500 +500 mV pk TLOAD 7 Load step 50% to/from 100% 4,5,6 -500 +500 transient load changes Recovery time step TT Load step 50% to/from 100% 4 100 LOAD 7, 8 transient load changes 5,6 01 200 s Load step 50% to/from 100% 4 100 5,6 200 Output response to transient VO Input step 16V to/from 4,5,6 01 500 mV pk TLINE 5, 9 step line changes 40VDC, I = 7500mA OUT For Notes to Specifications, refer to page 3 2 www.irf.com