AMA28XXS SERIES 28V Input, Single Output RADIATION TOLERANT DC/DC CONVERTERS. Description AMA. Features. 1 PD A

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1 PD A RADIATION TOLERANT DC/DC CONERTERS AMA8XXS SERIES 8 Input, Single Output Description The AMA8XXS series of DC/DC converter modules has been specifically designed for operation in moderate radiation environments supplementing the higher radiation performance available in the International Rectifier ART85T converter series. Environments presented to space vehicles operating in low earth orbits, launch boosters, orbiting space stations and similar applications requiring a low power, high performance converter with moderate radiation hardness performance will be optimally served by the AMA8XXS Series. The AMA8XXS has been designed for high density using chip and wire hybrid technology that complies with the class H requirements of MIL-PRF The physical configuration of the AMA8XXS series permits mounting directly to a heat conduction surface without the necessity of signal leads penetrating the heat sink surface. This package configuration permits greater independence in mounting and more mechanical security than traditional packages. Advanced Analog s rugged ceramic seal pins are used exclusively in the package thereby assuring long term hermeticity. Features AMA n 5 Watts Output Power n Available in 3.3, 5, and 5 olt Outputs n 6-40 DC Input Range (8 DC Nominal) n Total Ionizing Dose > 5KRads (Si) n No SEE to LET > 60 Me-cm /mg n -55 C to +5 C Operating Range n Indefinite Short Circuit Protection n Flexible Mounting n Fully Isolated - Input to Output and to Case n Complimentary EMI Filter Available n Electrical Performance Similar to ASA8XXS Series The AMA8XXS has been designed for high density using chip and wire hybrid technology that complies with the class H requirements of MIL-PRF Finished product will be fabricated in a facility fully qualified to MIL-PRF The standard processing adopted for the AMA8XXS meets the requirements of MIL-PRF for class H but with enhanced screening steps and includes element evaluation. Applicable generic lot qualification test data including radiation performance can be made available on request. ariations to the standard screening can be accommodated. Consult IR Santa Clara for special requirements. 03/0/04

2 AMA8XXS Series Specifications Absolute Maximum Ratings Input oltage Range Soldering Temperature Storage Case Temperature Recommended Operating Conditions Input oltage Range Output Power Operating Case Temperature Static Characteristics -55 C TCASE +5 C, IN=8 DC ±5, C L =0, unless otherwise specified. Parameter -0.5 to +50DC (Continuous), 80 (00ms) 300 C for 0 seconds 65 C to +35 C +6 to +40DC Less than or equal to 5W -55 C to +5 C Group A Subgroups Test Conditions Min Nom Max Unit Input oltage Output oltage Iout= , 3, 3, 3, Output Current in = 6, 8, 40 olts Output Power in = 8 olts, 00 load 3.96 W All Others 5.00 W Output Ripple oltage in = 6, 8, 40 olts 00 Load BW = 0 Hz to MHz m PP m PP m PP m PP Output voltage Regulation Line Load in = 6, 8, 40 olts Iout = 0, 50, and 00 load ±0 ±0 ±50 ±50 m m For Notes to Specifications, refer to page 4

3 AMA8XXS Series Static Characteristics (Continued) -55 C T CASE +5 C, IN =8 DC ±5, C L =0, unless otherwise specified. Parameter Group A Subgroups Test Conditions Min Nom Max Unit Input Current No Load in=8, Iout=0, Inhibit (pin 5)=open 0 50 Inhibit Inhibit (pin 5) shorted to input return (pin 7) 8 Input Ripple Current in = 6, 8, 40 olts, 00 load, BW = 0 Hz to MHz 00 PP Efficiency, 3, 3, 3, 3 00 load Isolation Input to output or any pin to case (except pin 8) at 500dc 00 MΩ Capacitive Load 3, 4 4 No effect on dc performance Short Circuit Power Dissipation 4 watts MTBF MIL-HDBK-7F, T c =35 C 700 Khrs Weight 3 g For Notes to Specifications, refer to page 4 3

4 AMA8XXS Series Dynamic Characteristics -55 C TCASE +5 C, IN=8 DC ±5, C L =0, unless otherwise specified. Parameter Group A Subgroups Test Conditions Min Nom Max Unit Short Circuit Recovery 4 0 load to 00 load 5 ms Switching Frequency 00 load KHz Output Response To Step Transient Load Changes 8 Load step 50ó mpk Load step 0 ó mpk Recovery Time, Step Transient Load Changes 5, 6 Load step 50ó Load step 0 ó Output Response Transient Step Line Changes 4, 7 Input step 6 ó 40dc, 00 load m pk m pk m pk m pk Recovery Time Transient Step Input step 6 ó 40dc, Line Changes 4, 6, 7 00 load 00 Turn On Overshoot 8 0 load 600 m pk 00 load 400 m pk Turn On Delay 8 0 load to 00 load 5 ms Notes to Specifications Parameter guaranteed by line and load regulation tests. Bandwidth guaranteed by design. Tested for 0 KHz to MHz. 3 Capacitive load may be any value from 0 to the maximum limit without compromising dc performance. A capacitive load in excess of the maximum limit will not disturb loop stability but may interfere with the operation of the load fault detection circuitry, appearing as a short circuit during turn on. 4 Parameter shall be tested as part of design characterization and after design or process changes. Parameters shall be guaranteed to the limit specified in Electrical Specifications. 5 Load step transition time between and 0 microseconds. 6 Recovery time is measured from the initiation of the transient to where OUT has returned to within ± of OUT at 50 percent load. 7 Input step transition time between and 0 microseconds. 8 Turn on delay time measurement is for either a step application of power at the input or the removal of a ground signal from the inhibit pin while power is applied to the input. 4

5 AMA8XXS Series AMA8XXS Block Diagram 6 +Input +Output Return Return 7 Housekeeping Supply Error Am plifier Case 8 Enable CS 5 Controller Application Information Inhibit Function Connecting the enable input (Pin 5) to input common (Pin 7) will cause the converter to shut down. It is recommended that the enable pin be driven by an open collector device capable of sinking at least 400 µa of current. The open circuit voltage of the inhibit input is DC. EMI Filter An optional EMI filter is available (AFH46) that will reduce the input ripple current to levels below the limits imposed by MIL-STD-46 CE

6 AMA8XXS Series Standard Process Screening for AMA8XXS Series Requirement MIL-STD-883 Method /EM Limits Flight (CH+) Limits Temperature Range -55 C to +5 C -55 C to +5 C Element Evaluation MIL-PRF Internal isual 07 Yes Temperature Cycle 00 Condition C Constant Acceleration 00 Condition A, (3000g) PIND 00 Condition A Burn-in Interim hrs 05 48hrs C ( x 60 hrs) Final Electrical (Group A) Read & Record Data MIL-PRF & Specification -55 C, +5 C, +5 C -55 C, +5 C, +5 C PDA (5C, interim to final) Radiographic Inspection 0 Yes Fine & Gross 04 Condition A, C External isual 009 Yes Per IR Internal Standards Radiation Specification Parameter Condition Min Typ Max Unit Total Ionizing Dose MIL-STD-883, Method 09.4 Operating bias applied during exposure Heavy Ion (Single event effects) 5 KRads (Si) BNL Dual an de Graf Generator 60 Me cm /mg 6

7 AMA8XXS Case Outline AMA8XXS Series Typ Ø 0.40 x Typ Pin Designation Pin No. Designation Positive Output Output Return 3 N/C 4 Blank 5 Enable 6 Positive Input 7 Input Return 8 Case Ground Model Input oltage 8 = Dia Tolerance unless otherwise specified: x.xx ±0.00 x.xxx ±0.005 Part Numbering AMA 8 05 S / EM Output oltage 03R3 = 3.3, 05 = 5 =, 5 = 5 Screening Blank = Flight Model (CH+) /EM = Engineering Model Outputs S = Single D = Dual WORLD HEADQUARTERS: 33 Kansas St., El Segundo, California 9045, Tel: (30) IR SANTA CLARA: 70 Martin Av., Santa Clara, California 95050, Tel: (408) isit us at for sales contact information. Data and specifications subject to change without notice. 03/04 7