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 @ 25°C Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -35 V Operating Junction Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . - 55°C to + 150°C Storage Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 65°C to + 150°C Typical Power/Thermal Characteristics: Rated Power @ 25° C TC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17.5W TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3W Thermal Resistance θJC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2°C/W θJA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42°C/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 - 1 3.3 OM7900IH OM7900SR ELECTRICAL CHARACTERISTICS -5 Volt VIN = -10V, Io = 500mA, -55°C ≤ TA ≤ 125°C (unless otherwise specified) Parameter Symbol Test Conditions Min. Max. Unit Output Voltage VOUT TA = 25°C -4.95 -5.05 V -4.85 -5.15 V 12 mV 25 mV • VIN = -7.5V to -20V Line Regulation VRLINE VIN = -7.5V to -20V • (Note 1) VIN = -8.0V to -12V • Load Regulation VRLOAD IO = 5mA to 1.5 Amp • (Note 1) IO = 250mA to 750 mA • Standby Current Drain ISCD Standby Current Drain ∆ISCD Change With Line (Line) Standby Current Drain ∆ISCD Change With Load (Load) 5 mV 12 mV 20 mV 25 mV 15 mV 30 mV 2.5 mA • • 3.0 mA VIN = -7.0V to -20V 0.4 mA IO = 5mA to 1000mA • 0.4 mA • Dropout Voltage VDO ∆VOUT = 100mV, IO = 1.0A Peak Output Current IO (pk) TA = 25°C Short Circuit Current IDS VIN = -35V 1.5 • (Note 2) 2.5 V 3.3 A 1.2 A 2.8 A ∆VIN f =120 Hz, ∆VIN = -10V ∆VOUT (Note 3) NO TA = 25°C, f =10 Hz to 100KHz 40 Long Term Stability ∆VOUT TA = 25°C, t = 1000 hrs. 75 (Note 3) ∆t Ripple Rejection Output Noise Voltage 63 • dB 60 dB (Note 3) RMS ELECTRICAL CHARACTERISTICS -12 Volt mV VIN = -19V, Io = 500mA, -55°C ≤ TA ≤ 125°C (unless otherwise specified) Parameter Symbol Test Conditions Min. Max. Output Voltage VOUT TA = 25°C -11.88 -12.12 V -11.64 -12.36 V 20 mV VIN = -14.5V to -27V Line Regulation VRLINE • VIN = -14.5V to -27V • (Note 1) VIN = -16V to -22V • Load Regulation VRLOAD IO = 5mA to 1.5 Amp • (Note 1) IO = 250mA to 750 mA • 3.3 µV/V Standby Current Drain ISCD Standby Current Drain ∆ISCD Change With Line (Line) Standby Current Drain ∆ISCD Change With Load (Load) mV 10 mV 30 mV 32 mV 60 mV 16 mV 30 mV 3.5 mA • • 4.0 mA 0.8 mA IO = 5mA to 1000mA • 0.5 mA • Dropout Voltage VDO ∆VOUT = 100mV, IO = 1.0A IO (pk) TA = 25°C, IO = 5mA to 1A Short Circuit Current IDS VIN = -35V 1.5 • (Note 2) ∆VIN 50 VIN = -14.5V to -27V Peak Output Current Ripple Rejection f =120 Hz, ∆VIN = -10V 1.8 V 3.3 A 1.2 A 2.8 56 • A dB ∆VOUT (Note 3) NO TA = 25°C, f =10 Hz to 100KHz 40 Long Term Stability ∆VOUT TA = 25°C, t = 1000 hrs. 120 (Note 3) ∆t Output Noise Voltage Unit 53 dB (Note 3) µV/V RMS 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 VIN = -23V, Io = 500mA, -55°C ≤ TA ≤ 125°C (unless otherwise specified) Parameter Symbol Test Conditions Min. Max. Output Voltage VOUT TA = 25°C -14.85 -15.15 V -14.55 -15.45 V • VIN = -17.5V to -30V Line Regulation VRLINE VIN = -17.5V to -30V (Note 1) 25 mV • 50 mV 15 mV • 25 mV 35 mV • 75 mV 21 mV • 45 mV VIN = -20V to -26V Load Regulation VRLOAD IO = 5mA to 1.5 Amp (Note 1) IO = 250mA to 750 mA Standby Current Drain ISCD Standby Current Drain ∆ISCD Change With Line (Line) Standby Current Drain ∆ISCD Change With Load (Load) 6.0 mA 6.5 mA VIN = -17.5V to -30V • • 0.8 mA IO = 5mA to 1000mA • 0.5 mA • 2.5 V Dropout Voltage VDO ∆VOUT = 100mV, IO = 1.0A Peak Output Current IO (pk) TA = 25°C Short Circuit Current IDS VIN = -35V ∆VIN f =120 Hz, ∆VIN = -10V 1.5 • (Note 2) Ripple Rejection 3.3 A 1.2 A 2.8 A 53 • dB ∆VOUT (Note 3) NO TA = 25°C, f =10 Hz to 100KHz 40 Long Term Stability ∆VOUT TA = 25°C, t = 1000 hrs. 150 (Note 3) ∆t Output Noise Voltage Unit 50 dB µV/V (Note 3) RMS 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 Tj = -55°C RIPPLE REJECTION DROPOUT VOLTAGE 2.5 100 2 IOUT = 1A 80 VOUT = 5V 2.5 1.5 60 2 IOUT = 500mA Tj = 25°C 1 1.5 IOUT = 0A 1 0.5 0 5 VIN - V = 8VDC +3.5Vrms IOUT = 1A Tj = 25°C 20 ∆VOUT = 100MV ∆VOUT = 100mV 0 40 0.5 Tj = 150°C 10 0 -75 -50 -25 0 25 50 75 100 125 150 0 10 Input To Output Differential (V) Junction Temperature (°C) 3.3 - 3 3.3 100 1k 10k Frequency (Hz) 100k 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, (2.2µF on the input, 1µF on the output) should be ceramic or solid tantalum which have good high frequency characteristics. If aluminum electrolytics are used, their values should be 10µF or larger. The bypass capacitors should be mounted with the shortest leads, and if possible, directly across the regulator terminals. Fixed Output Regulator 2 VIN 3 Basic Current Regulator VOUT OM79XX VIN 2 OM79XX 3 1 1 2.2µF 1µF + + 2.2µF R1 IQ IOUT VOUT + IQ IOUT = R1 MECHANICAL OUTLINE PIN CONNECTION .200 .190 .420 .410 Tab .045 .035 .665 .645 .150 .140 .537 .527 .430 .410 .038 MAX. 3.3 .750 .500 .035 .025 .100 TYP. .005 .120 TYP. Note: • Case is metal/hermetically sealed • Isolated Tab • Outline similar to JEDEC TO-220 outline OM79XXIH Isolated Front View Pin 1: Ground Pin 2: Input Pin 3: Output Tab: Isolated OM79XXH Non-Isolated Front View Pin 1: Ground Pin 2: Input Pin 3: Output Tab Input 1 2 3 OM7900IH Series OM7900SR Series MECHANICAL OUTLINE 1 2 SOLDERING FOOTPRINT 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 177-189ºC. 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 Omnirel Device Type Isolated Package Package Style M Hi-Rel Screening Level 205 Crawford Street, Leominster, MA 01453 USA (508) 534-5776 FAX (508) 537-4246