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| OM7638SM SURFACE MOUNT NEGATIVE ADJUSTABLE 3.0 AMP VOLTAGE REGULATOR Isolated Hermetic Surface Mount Package 3.0 Amp, Negative Adjustable Voltage Regulator FEATURES * * * * * * Isolated Hermetic Surface Mount Package Reference Voltage Set Internally To 2% (1% Available) Built-In Thermal Overload Protection Short Circuit Current Limiting Small Metal Package Product Is Available Hi-Rel Screened DESCRIPTION These three terminal negative regulators are supplied in a hermetic metal surface mount 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 3.0 amps of output current. These units feature 2% initial voltage tolerance, with 1.0% load regulation and .015% line regulation. ABSOLUTE MAXIMUM RATINGS Input to Output Voltage Differential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -35V Operating Junction Temperature Range. . . . . . . . . . . . . . . . . . . . . . . . - 55C to + 150C Storage Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 55C to + 150C Typical Power/Thermal Characteristics: Rated Power @ 25C TC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28W TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3W Thermal Resistance: JC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2C/W JA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42C/W Lead Temperature at Case (5 sec). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 225C 3.5 Note: For 1% device, add letter "A" in front of part number (e.g. OMA7638SM). 4 11 R1 Supersedes 1 06 R0 3.5 - 133 OM7638SM ELECTRICAL CHARACTERISTICS Parameter Reference Voltage Symbol VREF -55C TA +125C (unless otherwise specified) Min. -1.238 Max. -1.262 V -1.215 -1.285 0.015 %/V 0.04 50 mV 75 1.0 % 1.5 0.02 56 %/W dB 53 70 dB 60 100 2.0 A 5.0 5.0 mA 3.0 3.0 6.0 A 3.0 0.5 2.5 A 0.5 1.5 % A Unit Test Conditions VIN - VOUT = 5 V, IOUT = 5 mA, TA = 25 C 3 V VIN - VOUT 35 V * * * * Line Regulation (Note 1) Load Regulation (Note 1) VOUT VIN VOUT IOUT 3 V VIN - VOUT 35 V VOUT 5 V, TA = 25 C 10 mA IOUT IMAX. VOUT 5.0 V 10 mA IOUT IMAX. Thermal Regulation Ripple Rejection (Note 2) VIN VREF 30 ms pulse, TA = 25 C VOUT = -10 V, f = 120 Hz, CAdj = 0 VOUT = -10 V, f = 120 Hz, CAdj = 10 F * * * * * * * * * * Adjust Pin Current Adjust Pin Current Change IAdj IAdj VDIFF = 35 V, IL = 10 mA 10 mA IOUT IMAX. 3 V VIN - VOUT 35 V VIN - VOUT 35 V VIN - VOUT 10 V Minimum Load Current IMin Current Limit ILim VIN - VOUT 10 V VIN - VOUT = 35 V Temperature Stability (Note 2) Long Term Stability (Note 2) VOUT T VOUT T -55 C TJ +125 C TA = +125 C, t = 1000 hrs 1.0 % 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 30 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. MECHANICAL OUTLINE .425 PIN CONNECTION 2 3.5 .100 .200 .425 .035 WIDE FLAT 3 PLCS. 1 3 .350 MIN. .020 .115 .160 .020 .080 Pin 1: Pin 2: Pin 3: Case: VIN Adjust VOUT Isolated |
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