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| OM7900IH Series OM7900SR Series ISOLATED HERMETIC TO-257AA FIXED VOLTAGE NEGATIVE REGULATORS Three Terminal, Fixed Voltage, 1.5 Amp Precision Negative Regulators In Hermetic JEDEC TO-257AA Package and D2 Pac FEATURES * * * * * * Isolated Hermetic Package, JEDEC TO-257AA Outline Output Voltages: -5V, -12V, -15V (Other Voltages Available) Output Voltages Set Internally To 1% or 2% Built-In Thermal Overload Protection Short Circuit Current Limiting Product Is Available Screened To MIL-STD-883 DESCRIPTION These three terminal negative regulators are supplied in a hermetically sealed metal package whose outline is similar to the industry standard TO-220 plastic package. All protective features are designed into the circuit, including thermal shutdown, current limiting and safe-area control. With heat sinking, they can deliver over 1.5 amps of output current. These units feature internally trimmed output voltages to 1% or 2% of nominal voltage. Standard voltages are -5V, -12V, and -15V. However, other voltages are available up to -24 volts. These units are ideally suited for Military applications where a hermetically sealed package is required. ABSOLUTE MAXIMUM RATINGS @ 25C Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -35 V Operating Junction Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . - 55C to + 150C Storage Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 65C to + 150C Typical Power/Thermal Characteristics: Rated Power @ 25 C TC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17.5W TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3W Thermal Resistance JC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2C/W JA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42C/W Notes: Product also available in Non-Isolated construction. To order this version, delete "I" from part number. Non-Isolated Example: Isolated OM79XXIH OM79XXH Use letter "A" after part number to designate 1% output voltage tolerance. Example: OM7905AIH 0 03 R5 Supersedes 4 11 R4 3.3 3.3 - 1 OM7900IH OM7900SR ELECTRICAL CHARACTERISTICS -5 Volt Parameter Output Voltage Symbol VOUT VRLINE VIN = -10V, Io = 500mA, -55C TA 125C (unless otherwise specified) Min. -4.95 Max. -5.05 -5.15 12 Unit V V mV mV mV mV mV mV mV mV mA mA mA Test Conditions TA = 25C VIN = -7.5V to -20V Line Regulation (Note 1) VIN = -8.0V to -12V VIN = -7.5V to -20V * * * -4.85 25 5 12 20 Load Regulation (Note 1) VRLOAD IO = 5mA to 1.5 Amp * IO = 250mA to 750 mA 25 15 * Standby Current Drain ISCD ISCD (Line) ISCD (Load) VDO IO (pk) IDS VIN VOUT Output Noise Voltage (Note 3) Long Term Stability (Note 3) VOUT t TA = 25C, t = 1000 hrs. NO VOUT = 100mV, IO = 1.0A TA = 25C VIN = -35V IO = 5mA to 1000mA VIN = -7.0V to -20V 30 2.5 Standby Current Drain Change With Line Standby Current Drain Change With Load Dropout Voltage Peak Output Current Short Circuit Current (Note 2) Ripple Rejection * * * * 1.5 3.0 0.4 0.4 mA 2.5 3.3 1.2 V A A A dB dB * f =120 Hz, VIN = -10V (Note 3) TA = 25C, f =10 Hz to 100KHz 63 2.8 * 60 40 V/V RMS 75 mV ELECTRICAL CHARACTERISTICS -12 Volt Parameter Output Voltage Symbol VOUT VRLINE VIN = -19V, Io = 500mA, -55C TA 125C (unless otherwise specified) Min. -11.88 Max. -12.12 -12.36 20 Unit V V mV mV mV mV mV mV mV mV mA mA mA Test Conditions TA = 25C VIN = -14.5V to -27V * * -11.64 Line Regulation (Note 1) VIN = -14.5V to -27V VIN = -16V to -22V 50 10 * Load Regulation (Note 1) IO = 250mA to 750 mA VRLOAD IO = 5mA to 1.5 Amp 30 32 * * 60 16 30 3.5 Standby Current Drain ISCD ISCD (Line) ISCD (Load) VDO IO (pk) IDS VIN VOUT NO VOUT t VOUT = 100mV, IO = 1.0A TA = 25C, IO = 5mA to 1A VIN = -35V IO = 5mA to 1000mA VIN = -14.5V to -27V Standby Current Drain Change With Line Standby Current Drain Change With Load Dropout Voltage Peak Output Current Short Circuit Current * * * * 1.5 4.0 0.8 0.5 mA 1.8 3.3 1.2 V A A A dB dB 3.3 (Note 2) Ripple Rejection f =120 Hz, VIN = -10V (Note 3) TA = 25C, f =10 Hz to 100KHz TA = 25C, t = 1000 hrs. * 56 2.8 * 53 40 Output Noise Voltage (Note 3) Long Term Stability (Note 3) V/V RMS 120 mV Notes: 1. Load and Line Regulation are specified at a constant junction temperature. Pulse testing with low duty cycle is used. Changes in output voltage due to heating effects must be taken into account separately. 2. Short Circuit protection is only assured up to VIN = -35V. 3. If not tested, shall be guaranteed to the specified limits. The * denotes the specifications which apply over the full operating temperature range. 3.3 - 2 OM7900IH Series OM7900SR Series ELECTRICAL CHARACTERISTICS -15 Volt Parameter Output Voltage Symbol VOUT VRLINE VIN = -23V, Io = 500mA, -55C TA 125C (unless otherwise specified) Min. -14.85 Max. -15.15 -15.45 25 Unit V V mV mV mV mV mV mV mV mV mA mA mA Test Conditions TA = 25C VIN = -17.5V to -30V Line Regulation (Note 1) VIN = -20V to -26V VIN = -17.5V to -30V * * * -14.55 50 15 25 35 Load Regulation (Note 1) VRLOAD IO = 5mA to 1.5 Amp * IO = 250mA to 750 mA 75 21 * Standby Current Drain ISCD ISCD (Line) ISCD (Load) VDO IO (pk) IDS VIN VOUT Output Noise Voltage (Note 3) Long Term Stability (Note 3) VOUT t TA = 25C, t = 1000 hrs. NO VOUT = 100mV, IO = 1.0A TA = 25C VIN = -35V IO = 5mA to 1000mA VIN = -17.5V to -30V 45 6.0 Standby Current Drain Change With Line Standby Current Drain Change With Load Dropout Voltage Peak Output Current Short Circuit Current (Note 2) Ripple Rejection * * * * 1.5 6.5 0.8 0.5 mA 2.5 3.3 1.2 V A A A dB dB * f =120 Hz, VIN = -10V (Note 3) TA = 25C, f =10 Hz to 100KHz 53 2.8 * 50 40 V/V RMS 150 mV Notes: 1. Load and Line Regulation are specified at a constant junction temperature. Pulse testing with low duty cycle is used. Changes in output voltage due to heating effects must be taken into account separately. 2. Short Circuit protection is only assured up to VIN = -35V. 3. If not tested, shall be guaranteed to the specified limits. The * denotes the specifications which apply over the full operating temperature range. TYPICAL PERFORMANCE CHARACTERISTICS PEAK OUTPUT CURRENT 3.5 3 2.5 1.5 2 Tj = 25C IOUT = 500mA Tj = -55C DROPOUT VOLTAGE 2.5 100 RIPPLE REJECTION 2 IOUT = 1A 80 VOUT = 5V 60 1.5 1 Tj = 150C 1 IOUT = 0A 40 VIN - V = 8VDC +3.5Vrms IOUT = 1A Tj = 25C 0.5 VOUT = 100MV 0.5 VOUT = 100mV 20 3.3 10k 100k 0 0 5 10 0 -75 -50 -25 0 25 50 75 100 125 150 0 10 100 1k Input To Output Differential (V) Junction Temperature (C) Frequency (Hz) 3.3 - 3 OM7900IH Series OM7900SR Series TYPICAL APPLICATIONS Input bypass capacitors are recommended for stable operation of the OM7900 series of regulators over the input voltage and output current ranges. Output bypass capacitors will improve the transient response of the regulator. The bypass capacitors, (2.2F on the input, 1F on the output) should be ceramic or solid tantalum which have good high frequency characteristics. If aluminum electrolytics are used, their values should be 10F or larger. The bypass capacitors should be mounted with the shortest leads, and if possible, directly across the regulator terminals. Fixed Output Regulator 2 OM79XX 1 + 3 Basic Current Regulator VIN VOUT VIN 2 OM79XX 1 3 2.2F 1F + 2.2F IQ R1 IOUT VOUT + IQ IOUT = R1 MECHANICAL OUTLINE .420 .410 .200 .190 .045 .035 .665 .645 .537 .527 .430 .410 .038 MAX. PIN CONNECTION Tab .150 .140 3.3 .750 .500 .005 OM79XXIH Isolated Front View Pin 1: Ground Pin 2: Input Pin 3: Output Tab: Isolated 1 23 OM79XXH Non-Isolated Front View Pin 1: Ground Pin 2: Input Pin 3: Output Tab Input .035 .025 .100 TYP. .120 TYP. Note: * Case is metal/hermetically sealed * Isolated Tab * Outline similar to JEDEC TO-220 outline OM7900IH Series OM7900SR Series MECHANICAL OUTLINE SOLDERING FOOTPRINT 12 3 Pin 1: Pin 2: Pin 3: Case Ground Input Output N/C TYPICAL SOLDERING PROFILE Figure 1 shows a typical soldering profile for the D2 and D3 Packages when soldering a to a printed circuit board. The profile will vary from system to system and solders to solders. Factors that can affect the profile include the type of soldering system used, density and type of components on the board or substrate material being used. This profile shows temperature versus time. The two profiles described are based on a high density and a low density board. The type solder used was 62/36/2 Tin Lead Silver with a melting point between 177-189C. An convection/infrared soldering reflow system was used. The circuit and solder joints heat up first due to their mass followed by the components which typically run 30 degrees cooler than the solder joints. TYPICAL HEATING PROFILE PART NUMBER DESIGNATOR OM 7900 S R M Omnirel Device Type Isolated Package Package Style Hi-Rel Screening Level 205 Crawford Street, Leominster, MA 01453 USA (508) 534-5776 FAX (508) 537-4246 |
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