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| OM1840NKM OM1840SCM OM1840NCM 5 AMP LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR APPROVED TO DESC DRAWING 5962-89521 Three Terminal, Positive Adjustable Low Dropout Voltage Regulator In Hermetic Packages FEATURES * * * * * * * * Similar To Industry Standard LT1084 Approved To DESC Standardized Military Drawing Number 5962-89521 Adjustable Output Voltage Built In Thermal Overload Protection Short Circuit Current Limiting Maximum Output Voltage Tolerance is Guaranteed To 1% Guaranteed Dropout Voltage At Multiple Current Levels TO-258 Available in Isolated and Non-Isolated Packages DESCRIPTION This three terminal positive adjustable voltage regulator is designed to provide 5A with higher efficiency than conventional voltage regulators. This device is designed to operate down to 1 Volt input to output differential and the dropout voltage is fully specified as a function of load current. Supplied in easy-to-use hermetic TO-258 and TO-3 packages, this device is ideally suited for Military applications where small size and high reliability is required. ABSOLUTE MAXIMUM RATINGS @ 25C Power Dissipation (Pd) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Internally Limited Input - Output Voltage Differential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 V Operating Junction Temperature Range . . . . . . . . . . . . . . . . . . . . . - 55C to + 150C Storage Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 65C to + 150C Lead Temperature (Soldering 10 seconds) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300C Thermal Resistance: JC (TO-258 Isolated) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.0C/W JC (TO-258 Non-Isolated) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.3C/W JC (TO-3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.0C/W Maximum Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.0 A Recommended Operating Conditions: Output Voltage Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.3V to 15 V Ambient Operating Temperature Range (TA) . . . . . . . . . . . . . . . . - 55C to + 125C Input Voltage Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5V to 25 V 3.3 1 08 R3 Supersedes 4 11 R2 3.3 - 75 OM1840SCM OM1840NCM OM1840NKM ELECTRICAL CHARACTERISTICS Parameter Reference Voltage Symbol VREF -55C TA +125C (unless otherwise specified) Min. 1.238 Max. 1.262 Unit V Test Conditions VIN - VOUT = 3.0 V, IOUT = 10 mA, TA = 25 C 1.5 V VIN - VOUT 25 V, IOUT = 10 mA, IFL = 3.0 A * 1.225 1.270 V Line Regulation (Note 1) VOUT VIN 1.5 V VIN - VOUT 15 V, IOUT = 10 mA, TA = 25 C 15 V VIN - VOUT 35 V, IOUT = 10 mA 0.2 % * 0.5 % Load Regulation (Note 1) VOUT IOUT VIN - VOUT = 3.0 V, TA = 25 C IOUT = 10 mA, IFL = 3.0 A IFL = 3.0 A, VREF = 1% 30 ms pulse, TA = +25 C f = 120 Hz, CAdj = 25 F, COUT = 25 F (tantalum), IFL = 3.0 A, VIN - VOUT = 3.0 V 1.5 V VIN - VOUT 25 V, IOUT = 10 mA, IFL = 3.0 A 1.5 V VIN - VOUT 25 V, 10 mA IOUT 3.0 A VIN - VOUT = 25 V VIN - VOUT 5.0 V VIN - VOUT = 25 V -55 C TJ +125 C 0.3 % Dropout Voltage Thermal Regulation Ripple Rejection VDO VIN VOUT * * * 60 0.4 1.5 0.015 % V %/W dB Adjust Pin Current IAdj IAdj * * * * * * 120 A Adjust Pin Current Change 5.0 A Miminum Load Current Current Limit IMin ILim VOUT T VOUT T 10 5.5 0.3 1.5 mA A A % Temperature Stability (Note 2) Long Term Stability (Note 2) 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 45 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. Guaranteed by design, characterization or correlation to other tested parameters. The * denotes the specifications which apply over the full operating temperature range. 2. 3. PART NUMBER DESIGNATOR 3.3 Standard Military Drawing Number 8952101Y 8952101Z 8952101X "Y" = Isolated "Z" = Non-Isolated Omnirel Part Number OM1840SCM OM1840NCM OM1840NKM Part Numbering System Voltage Regulators isola OM-1840-S-C-M Company Identification Part Number Screening M= MIL-M 38535 * Package Codes: K= TO-204AA (TO-3) Z= TO-259AA (Z-Tab) C = TO-258AA Package (see Package codes*) S= Isolated N= Non isolated 3.3 - 76 OM1840NKM OM1840SCM OM1840NCM TYPICAL PERFORMANCE CHARACTERISTICS LOAD REGULATION 0.10 10 I= 5A 9 SHORT CIRCUIT CURRENT 8 7 6 5 4 3 2 1 IFULL LOAD 150C 25C -55C OUTPUT VOLTAGE DEVIATION (%) 0 -0.05 -0.10 -0.15 -0.20 -50 -25 0 25 50 75 100 125 150 SHORT CIRCUIT CURRENT (A) 0.05 0 0 5 10 15 20 25 30 35 TEMPERATURE (C) INPUT/OUTPUT DIFFERENTIAL (V) 100 90 ADJUSTMENT PIN CURRENT MINIMUM INPUT/OUTPUT DIFFERENTIAL (V) 2 DROPOUT VOLTAGE * INDICATES GUARANTEED TEST POINT -55C T 150C -55C Tjj 150C 0C Tj j125C 0C T 125C ADJUSTMENT PIN CURRENT (A) 80 70 60 50 40 30 20 10 0 -50 -25 0 25 50 75 100 125 150 TEMERATURE (C) 1 Tj = 25C Tj = 150C Tj = -55C 0 0 1 2 3 4 5 6 OUTPUT CURRENT (A) TEMPERATURE STABILITY 1.270 MINIMUM OPERATING CURRENT 10 MINIMUM OPERATING CURRENT (mA) 9 8 7 6 5 4 3 2 1 0 0 5 10 15 20 25 30 INPUT/OUTPUT DIFFERENTIAL (V) 35 Tj = -55C Tj = 25C Tj = 150C 3.3 REFERENCE VOLTAGE (V) 1.260 1.250 1.240 1.230 -50 -25 0 25 50 75 100 125 150 TEMPERATURE (C) 3.3 - 77 OM1840SCM OM1840NCM OM1840NKM TYPICAL APPLICATIONS TYPICAL APPLICATIONS Parelleling Regulators VIN IN OM1840 OUT ADJ 0.015 0.015 Improving Ripple Rejection VIN VIN + 2 FEET #18 WIRE* 1+ R2 __ VOUT =1.25 R1 OM1840 VOUT R1 1211% R2 365 1% + C1 VIN 16.5V 150F ( ) 10F ADJ IOUT = OA TO 15A *C1 IMPROVES RIPPLE REJECTION. X C SHOULD BE ~ R1 AT RIPPLE FREQUENCY. IN OM1840 OUT ADJ R1 120 R2 10F* * THE #18 WIRE ACTS AS BALLAST RESISTENCE INSURING CURRENT SHARING BETWEEN BOTH DEVICES. 1.2V - 15V Adjustable Regulator VIN OM1840 VOUT ADJ + 5V Regulator with Shutdown VIN VIN OM1840 VOUT ADJ 121 1% + R1 121 VOUT 5V + C1 10F R2 5k C2 100F TTL + 10F 2N3904 1k 1k 100F 365 1% *NEEDED IF DEVICE IS FAR FROM FILTER CAPACITORS R2 __ VOUT=1.25V 1+ R1 ( ) MECHANICAL OUTLINE .165 .155 .695 .685 .270 .240 .045 .035 0.135 MAX. MECHANICAL OUTLINE TO-3 1.53 REF. 0.875 MAX. 0.450 0.250 1.197 1.177 0.675 0.655 0.440 0.420 0.188 R. MAX. .835 .815 .707 .697 .550 .530 0.312 MIN. SEATING PLANE 0.043 0.038 2 PLCS. 0.225 0.205 0.161 0.151 0.525 R. MAX. .092 MAX. 3.3 .750 .500 .065 .055 1 2 3 .005 PIN OUT 1 2 Case Adjust VIN VOUT .200 TYP. .140 TYP. PIN OUT 1 2 3 Adjust VOUT VIN NOTES * Case is metal/hermetically sealed * Isolated Tab |
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