OM3957NMM OM3957SMM OM3957STM 1.3 AMP LOW DROPOUT 3.3 FIXED VOLTAGE R E G U L ATOR APPROVED TO SMD 5962-98590 Please see mechanical outlines herein Three Terminal, 3.3 Volt Positive Fixed Low Dropout Voltage Regulator In Hermetic JEDEC TO-257AA and Surface Mount Packages FEATURES • • • • • • • Similar To Industry Standard LT1086 -3.3 Approved To DS C C Standardized Military Drawing Number 5962-98590 Built In Thermal Overload Protection Short Circuit Current Limiting Available In Isolated Package Output Voltage Tolerance is Guaranteed To ±1% Guaranteed Dropout Voltage At Multiple Current Levels DESCRIPTION This 3.3 volt fixed voltage regulator is designed to provide 1.3A of current with a higher efficiency than conventional voltage regulators. This device is designed to operate down to 1 volt input to output differential and the 1.5V dropout voltage is guaranteed at the maximum output current. This device is ideally suited for those systems where high reliability, small size and low weight are required. The isolated package simplifies the system assembly methods. ABSOLUTE MAXIMUM RATINGS @ 25°C Input Voltage .... .................................................... 30V OutputCurrent........................................................1.3A Operating Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .- 65°C to + 150°C Storage Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .- 65°C to + 150°C Lead Temperature (Soldering 10 seconds) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300°C Power Dissipation (Pd)............................ ... .......... InternallyLimited Thermal Resistance: qJC (Isolated)..... .............................................. 4.2°C/W qJA .... ....................................................... 42°C/W Standard Military Drawing 5962-9859001MMA 5962-9859001M U A 5962-9859001MNA 9 01 R1 supersedes 8 07 R0 Part Number Designator Omnirel Part Number OM3957SMM OM3957STM OM3957NMM 3.3 - 1 OM3957NMM OM3957SMM OM3957STM ELECTRICAL CHARACTERISTICS -55°C TA 125°C (unless otherwise specified) Parameter Symbol Test Conditions Min. Max. Unit Output Voltage VO U T V IN = 5.0 V, IO U T = 10 mA 3.267 3.333 V 3.235 3.365 V 10 mV TA = 25° C 4.75 V 10 mA Line Regulation ³VO U T (Note 1) ³VIN Load Regulation ³VO U T (Note 1) I ³O U T 4.5V VIN 4.5V VIN 18 V, IO U T 1.3 A 18 V, IO U T = 0 A, TA = 25° C VIN 18 V, IO U T = 0 A V IN = 5.0 V, 0A IO U T • 12 1.3 A 15 mV 25 mV TA = 25° C V IN = 5.0 V, 0A IO U T 1.3 A Dropout Voltage VD O IO U T = 1.3 A, ³VREF = 1% Thermal Regulation - 30 ms pulse, TA = +25° C Ripple Rejection • ³VIN f = 120 Hz, CAdj = 25 µF, ³VO U T C O U T = 25 µF (tantalum), IO U T = 1.3 A, • • • 1.5 V 0.04 %/W 60 dB V IN = 6.3 V Quiescent Current IQ Current Limit ILim V IN = 18 V V IN = 8.3 V V IN = 28.3 V Temperature Stability ³VO U T (Note 2) ³T Long Term Stability ³VO U T (Note 2) ³T -55° C TJ • • • 10 mA 1.3 2.5 A .050 - A 1.5 % 1.0 % +125° C TA = +125° C, t = 1000 hrs Notes: 1. Line and Load Regulation are measured at a constant junction temperature using a low duty cycle pulse technique. Although power dissipation is internally limited, regulation is guaranteed up to the maximum power dissipation of 13 W. Power dissipation is determined by the input/output differential voltage and the output current. Guaranteed maximum power dissipation will not be available over the full input/output voltage range. 2. Guaranteed by design, characterization or correlation to other tested parameters. 3. The • denotes the specifications which apply over the full operating temperature range. OM3957NMM OM3957SMM OM3957STM OM3957STM MECHANICAL OUTLINE CONNECTION DIAGRAM .200 .190 .420 .410 4 .045 .035 .665 .645 .150 .140 .537 .527 .430 .410 .038 MAX. .750 .500 .005 1 2 3 .120 TYP. .100 TYP. .035 .025 PIN OUT 1 2 3 4 NOTES • Case is metal/hermetically sealed • Isolated Tab Ground VO U T V IN Isolated OM3957SMM OM3957NMM MECHANICAL OUTLINE MECHANICAL OUTLINE .425 .140 .450 .015 .140 .140 1 2 .050 .050 1 .100 3 .200 2 .157 .425 .035 WIDE FLAT 3 PLCS. .030 MIN. .625 .350 MIN. .415 3 .037 .375 ± .020 .115 .160 .020 .080 Front Pin 1 Pin 2 Pin 3 Tab - View Ground V IN VO U T Isolated Front Pin 1 Pin 2 Pin 3 - View V IN Ground VO U T 205 Crawford Street, Leominster, MA 01453 USA (978) 534-5776 FAX (978) 537-4246 Visit Our Web Site at www.omnirel.com THANK YOU FOR YOUR INTEREST IN OMNIREL’S PRODUCTS! 205 Crawford Street, Leominster, MA 01453 USA (978) 534-5776 FAX (978) 537-4246 Visit Our Web Site at www.omnirel.com