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 @ 25°C Power Dissipation (Pd) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Internally Limited Input - Output Voltage Differential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 V Operating Junction Temperature Range . . . . . . . . . . . . . . . . . . . . . - 55°C to + 150°C Storage Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 65°C to + 150°C Lead Temperature (Soldering 10 seconds) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300°C Thermal Resistance: θJC (TO-258 Isolated) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.0°C/W θJC (TO-258 Non-Isolated) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.3°C/W θJC (TO-3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.0°C/W Maximum Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.0 A Recommended Operating Conditions: Output Voltage Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.3V to 15 V Ambient Operating Temperature Range (TA) . . . . . . . . . . . . . . . . - 55°C to + 125°C Input Voltage Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5V to 25 V 1 08 R3 Supersedes 4 11 R2 3.3 - 75 3.3 OM1840SCM OM1840NCM OM1840NKM ELECTRICAL CHARACTERISTICS -55°C ≤ TA ≤ +125°C (unless otherwise specified) Parameter Symbol Test Conditions Min. Max. Unit Reference Voltage VREF VIN - VOUT = 3.0 V, 1.238 1.262 V 1.225 1.270 V 0.2 % 0.5 % 0.3 % 0.4 % IOUT = 10 mA, TA = 25° C 1.5 V ≤ VIN - VOUT ≤ 25 V, • IOUT = 10 mA, IFL = 3.0 A Line Regulation ∆VOUT (Note 1) ∆VIN 1.5 V ≤ VIN - VOUT ≤ 15 V, IOUT = 10 mA, TA = 25° C 15 V ≤ VIN - VOUT ≤ 35 V, • IOUT = 10 mA Load Regulation ∆VOUT VIN - VOUT = 3.0 V, TA = 25° C (Note 1) ∆IOUT IOUT = 10 mA, IFL = 3.0 A Dropout Voltage VDO IFL = 3.0 A, ∆VREF = 1% Thermal Regulation - 30 ms pulse, TA = +25° C ∆VIN f = 120 Hz, CAdj = 25 µF, ∆VOUT COUT = 25 µF (tantalum), IFL = 3.0 A, Adjust Pin Current IAdj 1.5 V ≤ VIN - VOUT ≤ 25 V, Adjust Pin Current Change ∆IAdj 1.5 V ≤ VIN - VOUT ≤ 25 V, Ripple Rejection • • • 1.5 V 0.015 %/W 60 dB VIN - VOUT = 3.0 V • 120 µA • 5.0 µA • • • • 10 mA IOUT = 10 mA, IFL = 3.0 A 10 mA ≤ IOUT ≤ 3.0 A Miminum Load Current IMin VIN - VOUT = 25 V Current Limit ILim VIN - VOUT ≤ 5.0 V VIN - VOUT = 25 V Temperature Stability ∆VOUT (Note 2) ∆T Long Term Stability ∆VOUT (Note 2) ∆T -55° C ≤ TJ ≤ +125° C 5.5 A 0.3 A TA = +125° C, t = 1000 hrs 1.5 % 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. 2. Guaranteed by design, characterization or correlation to other tested parameters. 3. The • denotes the specifications which apply over the full operating temperature range. PART NUMBER DESIGNATOR 3.3 Standard Military Drawing Number Omnirel Part Number 8952101Y OM1840SCM 8952101Z OM1840NCM 8952101X OM1840NKM “Y” = Isolated “Z” = Non-Isolated Part Numbering System Voltage Regulators isola OM-1840-S-C-M Company Identification Part Number * Package Codes: Screening M= MIL-M 38535 Package (see Package codes*) S= Isolated N= Non isolated 3.3 - 76 K= TO-204AA (TO-3) Z= TO-259AA (Z-Tab) C = TO-258AA OM1840NKM OM1840SCM OM1840NCM TYPICAL PERFORMANCE CHARACTERISTICS LOAD REGULATION SHORT CIRCUIT CURRENT 10 OUTPUT VOLTAGE DEVIATION (%) 0.10 9 ∆I= 5A 8 SHORT CIRCUIT CURRENT (A) 0.05 0 -0.05 -0.10 -0.15 7 150°C 6 25°C 5 -55°C 4 3 2 IFULL LOAD 1 -0.20 0 -50 -25 0 25 50 75 100 125 150 0 5 TEMPERATURE (°C) MINIMUM INPUT/OUTPUT DIFFERENTIAL (V) ADJUSTMENT PIN CURRENT (µA) 90 80 70 60 50 40 30 20 10 0 -50 -25 0 25 50 75 20 25 30 35 100 125 2 • INDICATES GUARANTEED TEST POINT -55°C≤ TTjj≤ 150°C -55°C 150°C 0°C0°C ≤ Tj ≤Tj125°C 125°C 1 Tj = -55°C Tj = 25°C Tj = 150°C 0 0 150 1 2 3 4 5 6 OUTPUT CURRENT (A) TEMERATURE (°C) TEMPERATURE STABILITY MINIMUM OPERATING CURRENT 10 MINIMUM OPERATING CURRENT (mA) 1.270 REFERENCE VOLTAGE (V) 15 DROPOUT VOLTAGE ADJUSTMENT PIN CURRENT 100 10 INPUT/OUTPUT DIFFERENTIAL (V) 1.260 1.250 1.240 1.230 -50 -25 0 25 50 75 3.3 9 8 7 6 5 Tj = 150°C Tj = 25°C 4 3 2 1 Tj = -55°C 0 100 125 150 0 TEMPERATURE (°C) 3.3 - 77 5 10 15 20 25 30 INPUT/OUTPUT DIFFERENTIAL (V) 35 OM1840SCM OM1840NCM OM1840NKM TYPICAL APPLICATIONS TYPICAL APPLICATIONS Parelleling Regulators 2 FEET #18 WIRE* IN OM1840 OUT VIN Improving Ripple Rejection ADJ VIN 1+ R2 __ VOUT =1.25 R1 ( 0.015Ω 0.015 IN OM1840 OUT ) 10µF R1 120 OM1840 VIN ≥16.5V VOUT R1 1211% Ω ADJ + 150µF IOUT = OA TO 15A R2 365 1% Ω *C1 IMPROVES RIPPLE REJECTION. X C SHOULD BE ~ R1 AT RIPPLE FREQUENCY. * THE #18 WIRE ACTS AS BALLAST RESISTENCE INSURING CURRENT SHARING BETWEEN BOTH DEVICES. ADJ VIN + C1 10µF* R2 1.2V - 15V Adjustable Regulator VIN OM1840 VOUT R1 121 Ω ADJ + 5V Regulator with Shutdown VOUT † VIN OM1840 VOUT VIN ADJ + C1 10µF C2 100µF R2 5k + + 10µF 2N3904 TTL 5V 121 Ω 1% 1k 100µF 365 Ω 1% 1k *NEEDED IF DEVICE IS FAR FROM FILTER CAPACITORS † R2 __ V OUT =1.25V 1+ R1 ( ) MECHANICAL OUTLINE .270 .240 .695 .685 .165 .155 MECHANICAL OUTLINE TO-3 .045 .035 0.875 MAX. .550 .530 0.312 MIN. .092 MAX. .750 .500 0.225 0.205 0.043 0.038 2 PLCS. .005 .065 .055 .200 TYP. 1 2 3 .140 TYP. PIN OUT 1 2 3 0.675 0.655 0.188 R. MAX. 0.450 0.250 SEATING PLANE 3.3 1.177 0.135 MAX. .835 .815 .707 .697 1.197 1.53 REF. Adjust VOUT VIN NOTES • Case is metal/hermetically sealed • Isolated Tab PIN OUT 1 2 Case Adjust VIN VOUT 0.161 0.151 0.525 R. MAX. 0.440 0.420