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 @ 25°C Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 V Operating Junction Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . - 55°C to + 150°C Storage Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 55°C to + 150°C Output Current OM185SM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.0 A Output Current OM186SM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.0 A Thermal Resistance - OM185SM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9°C/W Thermal Resistance - OM186SM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14°C/W Lead Temperature (Soldering 10 Seconds) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 280°C 3.5 4 11 R0 3.5 - 43 OM185SM/SR/NR - OM186SM/SR/NR ELECTRICAL CHARACTERISTICS (TJ = -55°C to +125°C) Parameter Reference Voltage Line Regulation Load Regulation Dropout Voltage Current Limit OM185SM OM186SM Minimum Load Current Thermal Regulation OM185SM OM186SM Ripple Rejection Conditions IOUT = 10mA, Tj = 25°C (VIN - VOUT) = 3V 10mA ≤ IOUT ≤ IFULL LOAD 1.5V ≤ (VIN - VOUT) ≤ 25 V (Note 3) ILOAD = 10mA, 1.5V ≤ (VIN -VOUT) ≤ 15V, Tj = 25°C 15V ≤ (VIN - VOUT ) ≤ 35V (Notes 1 & 2) (VIN - VOUT) = 3V 10mA ≤ IOUT ≤ IFULL LOAD Tj = 25°C (Notes 1, 2, & 3) Min. Max. Units 1.238 1.262 V 1.220 • 1.270 0.25 0.6 V % % • 1.0 1.2 % % ∆VREF = 1%, IOUT = IFULL LOAD • 1.5 V (VIN - VOUT) = 5V (VIN - VOUT) = 25V (VIN - VOUT) = 5V (VIN - VOUT ) = 25V (VIN - VOUT) = 25V TA = 25°C, 30 ms pulse • • • • • 15 A A A A mA 0.025 0.055 %/W %/W 120 dB µA 5 1 1 µA % % f = 120Hz CADJ = 25µF Tantalum IOUT - IFULL LOAD (VIN - VOUT) = 3V Adjust Pin Current TJ = 25°C Adjust Pin Current Change 10mA ≤ IOUT ≤ IFULL LOAD 1.5V ≤ (VIN - VOUT) ≤ 25V Temperature Stability -55°C ≤ TJ ≤ +150°C Long Term Stability TA = 125°C, 1000 Hrs. • 2.0 0.10 1.0 0.05 60 • 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. 3.5 The • denotes the specifications which apply over the full operating temperature range. 3.5 - 44 OM185SM/SR/NR - OM186SM/SR/NR TYPICAL PERFORMANCE CHARACTERISTICS OM185SM LOAD REGULATION OM186SM LOAD REGULATION 0.10 OUTPUT VOLTAGE DEVIATION (%) OUTPUT VOLTAGE DEVIATION (%) 0.10 I= 1A 0.05 0 -0.05 -0.10 -0.15 -0.20 -50 -25 0 25 50 I= 2A 0.05 0 -0.05 -0.10 -0.15 -0.20 -50 -25 75 100 125 150 0 TEMPERATURE (°C) OM185SM TEMPERATURE STABILITY OM186SM TEMPERATURE STABILITY 1.270 REFERENCE VOLTAGE (V) OUTPUT VOLTAGE CHANGE (%) 2.0 1.0 0 -1.0 -2.0 -50 -25 0 25 50 25 50 75 100 125 150 TEMPERATURE (°C) 1.260 1.250 1.240 1.230 -50 -25 75 100 125 150 0 TEMPERATURE (°C) 25 50 75 100 125 150 TEMPERATURE (°C) OM186SM OM185SM SHORT CIRCUIT CURRENT SHORT CIRCUIT CURRENT 5 SHORT CIRCUIT CURRENT (A) SHORT CIRCUIT CURRENT (A) 2 1.5 Tj = 150°C 1 Tj = 25°C Tj = -55°C 0.5 GUARANTEED OUTPUT CURRENT 4 25°C 3 3.5 150°C 2 -55°C 1 I FULL LOAD 0 0 5 10 15 20 25 0 30 0 INPUT/OUTPUT DIFFERENTIAL (V) 5 10 15 20 25 30 INPUT/OUTPUT DIFFERENTIAL (V) 3.5 - 45 35 OM185SM/SR/NR - OM186SM/SR/NR MECHANICAL OUTLINES D2 SMD-1 .140 .140 .140 .015 .450 .050 .050 .157 1 2 .030 MIN. .625 3 .415 .037 TOP VIEW .375 SIDE VIEW BOTTOM VIEW 1. ADJ 2. Vout 3. Vin LCC-28 .090 MAX. .450 SQ. .02 x 45° .300 4 PLCS. .050 24 PLCS. 12 .035 4 PIN 1 PIN 28 .305 SQ. 1 26 TOP 3.5 .05 X 45° MAX. 3 PLCS. SIDE 18 .009 R. BOTTOM 28 PLCS. Pin Connection Pin 1, 15 thru 28: Pin 2, 3, 13, and 14: Pin 4 thru 12: IN ADJ OUT