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| OM185SM/SR/NR OM186SM/SR/NR SURFACE MOUNT LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR Three Terminal, Adjustable Low Dropout 2.0 Amp And 1.0 Amp Positive Voltage Regulators FEATURES * * * * * * * Hermetic Surface Mount Package Operates Down To 1V Dropout, 1.5V @ Max. Current .020% Line Regulation Typically .050% Load Regulation Typically 1% Reference Voltage Electrically Equivalent To LT1085 And LT1086 Available Hi-Rel Screened DESCRIPTION These three terminal positive adjustable voltage regulators in a surface mount package are designed to provide 2.0 Amps and 1.0 Amp with higher efficiency than conventional voltage regulators. The devices are designed to operate to 1 Volt input to output differential and the dropout voltage is specified as a function of load current. These devices are ideally suited for Hi-Rel applications where surface mount, small size, hermeticity and high reliability are required. ABSOLUTE MAXIMUM RATINGS @ 25C Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 V Operating Junction Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . - 55C to + 150C Storage Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 55C to + 150C Output Current OM185SM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.0 A Output Current OM186SM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.0 A Thermal Resistance - OM185SM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9C/W Thermal Resistance - OM186SM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14C/W Lead Temperature (Soldering 10 Seconds) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 280C 3.5 4 11 R0 3.5 - 43 OM185SM/SR/NR - OM186SM/SR/NR ELECTRICAL CHARACTERISTICS (TJ = -55C to +125C) Parameter Reference Voltage Conditions IOUT = 10mA, Tj = 25C (VIN - VOUT) = 3V 10mA IOUT IFULL LOAD 1.5V (VIN - VOUT) 25 V (Note 3) ILOAD = 10mA, 1.5V (VIN -VOUT) 15V, Tj = 25C 15V (VIN - VOUT ) 35V (Notes 1 & 2) (VIN - VOUT) = 3V 10mA IOUT IFULL LOAD Tj = 25C (Notes 1, 2, & 3) VREF = 1%, IOUT = IFULL LOAD (VIN - VOUT) = 5V (VIN - VOUT) = 25V (VIN - VOUT) = 5V (VIN - VOUT ) = 25V (VIN - VOUT) = 25V TA = 25C, 30 ms pulse Min. 1.238 * * 1.220 Max. 1.262 1.270 0.25 0.6 Units V V % % Line Regulation Load Regulation * Dropout Voltage Current Limit OM185SM OM186SM Minimum Load Current Thermal Regulation OM185SM OM186SM Ripple Rejection * * * * * * 2.0 0.10 1.0 0.05 1.0 1.2 1.5 % % V A A A A mA %/W %/W 15 0.025 0.055 f = 120Hz CADJ = 25F Tantalum IOUT - IFULL LOAD (VIN - VOUT) = 3V Adjust Pin Current TJ = 25C Adjust Pin Current Change 10mA IOUT IFULL LOAD 1.5V (VIN - VOUT) 25V Temperature Stability -55C TJ +150C Long Term Stability TA = 125C, 1000 Hrs. 60 120 * 5 1 1 dB A A % % Note 1: Load and line regulation are measured at a constant junction temperature by low duty cycle pulse testing. Note 2: Line and load regulation are guaranteed up to the maximum power dissipation (OM185/20W, OM186/10W). Power dissipation is determined by the input/output differential and the output current. Guaranteed maximum power dissipation will not be available over the full input/output voltage range. Note 3: IFULL LOAD curve is defined as the minimum value of current limit as a function of input to output voltage. Note that power dissipation is only achievable over a limited range of input to output voltage. Note 4: Dropout voltage is specified over the full output current range of the device. The * denotes the specifications which apply over the full operating temperature range. 3.5 3.5 - 44 OM185SM/SR/NR - OM186SM/SR/NR TYPICAL PERFORMANCE CHARACTERISTICS OM186SM LOAD REGULATION OUTPUT VOLTAGE DEVIATION (%) 0.10 OUTPUT VOLTAGE DEVIATION (%) I= 1A 0.05 0 -0.05 -0.10 -0.15 -0.20 -50 OM185SM LOAD REGULATION 0.10 I= 2A 0.05 0 -0.05 -0.10 -0.15 -0.20 -50 -25 -25 0 25 50 75 100 125 150 0 TEMPERATURE (C) 25 50 75 100 125 150 TEMPERATURE (C) 2.0 OUTPUT VOLTAGE CHANGE (%) OM186SM TEMPERATURE STABILITY REFERENCE VOLTAGE (V) OM185SM TEMPERATURE STABILITY 1.270 1.0 1.260 0 1.250 -1.0 1.240 -2.0 -50 -25 0 25 50 75 100 125 150 TEMPERATURE (C) 1.230 -50 -25 0 25 50 75 100 125 150 TEMPERATURE (C) OM186SM SHORT CIRCUIT CURRENT 2 SHORT CIRCUIT CURRENT (A) 5 OM185SM SHORT CIRCUIT CURRENT SHORT CIRCUIT CURRENT (A) 1.5 Tj = 150C 1 Tj = 25C Tj = -55C 0.5 GUARANTEED OUTPUT CURRENT 0 0 5 10 15 20 25 30 4 25C 3 150C -55C 1 0 0 5 10 15 20 25 30 35 INPUT/OUTPUT DIFFERENTIAL (V) I FULL LOAD 3.5 2 INPUT/OUTPUT DIFFERENTIAL (V) 3.5 - 45 OM185SM/SR/NR - OM186SM/SR/NR MECHANICAL OUTLINES D2 .450 SMD-1 .140 .015 .050 .157 .140 .140 .050 .030 MIN. 1 2 3 .625 .415 .037 .375 TOP VIEW SIDE VIEW BOTTOM VIEW 1. ADJ 2. Vout 3. Vin LCC-28 .450 SQ. .02 x 45 .090 MAX. .035 4 PIN 1 PIN 28 1 26 TOP .05 X 45 MAX. 3 PLCS. SIDE .009 R. BOTTOM 28 PLCS. IN ADJ OUT .300 4 PLCS. .050 24 PLCS. 12 .305 SQ. 18 3.5 Pin Connection Pin 1, 15 thru 28: Pin 2, 3, 13, and 14: Pin 4 thru 12: |
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