OM3914NKM OM3914STM OM3914NTM 3 AMP NEGATIVE ADJUSTABLE REGULATOR APPROVED TO DESC DRAWING 5962-87741 Three Terminal, Negative Adjustable Voltage Regulator In Hermetic Packages FEATURES • • • • • • • • Similar To Industry Standard LT1033 Approved To DESC Standardized Military Drawing Number 5962-8774101 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-257 Available in Isolated and Non-Isolated Packages DESCRIPTION This three terminal negative adjustable voltage regulator is designed to provide 3A 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-257 and TO-3, 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 Junction to Case: (TO-257, Isolated) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.5°C/W (TO-257, Non-Isolated) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.3°C/W (TO-3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.0°C/W Recommended Operating Conditions: Output Voltage Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -3V to -15 V Ambient Operating Temperature Range (TA) . . . . . . . . . . . . . . . . - 55°C to + 125°C Input Voltage Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 5V to -35 V 1 08 R2 Supersedes 4 11 R1 3.3 - 119 3.3 OM3914STM OM3914NTM OM3914NKM ELECTRICAL CHARACTERISTICS -55°C ≤ TA ≤ +125°C (unless otherwise specified) Parameter Symbol Test Conditions Min. Max. Reference Voltage VREF VIN - VOUT = 5 V, IOUT = 5 mA, TA = 25° C -1.238 -1.262 -1.215 -1.285 3 V ≤ VIN - VOUT ≤ 35 V Line Regulation ∆VOUT (Note 1) ∆VIN Load Regulation ∆VOUT VOUT ≤ 5 V, TA = 25° C (Note 1) ∆IOUT 10 mA ≤ IOUT ≤ IMAX. 3 V ≤ VIN - VOUT ≤ 35 V • V 0.015 %/V • 0.04 50 mV • 75 VOUT ≥ 5.0 V 1.0 10 mA ≤ IOUT ≤ IMAX. Thermal Regulation - Ripple Rejection ∆VIN (Note 2) ∆VREF 1.5 30 ms pulse, TA = 25° C VOUT = -10 V, f = 120 Hz, CAdj = 0 Adjust Pin Current IAdj VDIFF = 35 V, IL = 10 mA Adjust Pin Current Change ∆IAdj 10 mA ≤ IOUT ≤ IMAX. 3 V ≤ VIN - VOUT ≤ 35 V VIN - VOUT ≤ 35 V IMin VIN - VOUT ≤ 10 V Current Limit % • VOUT = -10 V, f = 120 Hz, CAdj = 10 µF Minimum Load Current ILim (Note 2) ∆T Long Term Stability ∆VOUT (Note 2) ∆T 53 • • • • • • 60 70 dB 100 µA 5.0 5.0 mA 3.0 6.0 A 3.0 2.5 A 0.5 • 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 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. 3.3 PART NUMBER DESIGNATOR Standard Military Drawing Number Omnirel Part Number 5962-8774101U 5962-8774101T 5962-8774101X OM3914STM OM3914NTM OM3914NKM “U” = Isolated “T” = Non-Isolated Part Numbering System Voltage Regulators OM-3914-S-T-M Company Identification Part Number Screening M= MIL-M 38535 Package (see Package codes*) S= Isolated N= Non isolated 3.3 - 120 µA 2.0 0.5 • -55° C ≤ TJ ≤ +125° C %/W dB • • VIN - VOUT = 35 V ∆VOUT 0.02 56 3.0 VIN - VOUT ≤ 10 V Temperature Stability Unit OM3914STM OM3914NTM OM3914NKM TYPICAL PERFORMANCE CHARACTERISTICS 2.8 2.6 2.4 2.2 2.0 TEMPERATURE STABILITY 1.270 Reference Voltage (V) TJ = -55°C TJ = -25°C 1.8 1.6 1.4 1.2 TJ = -150°C 1.260 1.250 1.240 Output Current (A) 1.230 -75 -50 -25 0 25 50 75 100125150 Temperature (°C) MINIMUM LOAD CURRENT RIPPLE REJECTION 0.5 1.0 1.5 2.0 2.5 3.0 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 100 Ripple Rejection (dB) Current (mA) Input-Output Differential (V) DROPOUT VOLTAGE TJ = -55°C TJ = 150°C TJ = 25°C CADJ = 10µF 80 60 CADJ = 0 40 VIN = -15 V 20 VOUT = -10 V f = 120Hz, TJ = 25°C 0 0.01 0 10 20 30 40 Input-Output Differential (V) LOAD REGULATION 0.1 1 Output Current (A) 10 GUARANTEED MINIMUM OUTPUT CURRENT 5 Output Current (A) Output Voltage Deviation (%) 0.8 0.4 0 -0.4 -0.8 4 3 2 1 0 0 0.8 1.6 2.4 3.2 Output Current (A) 0 5 10 15 20 25 30 35 Input-Output Differential (V) 4.0 3.3 - 121 3.3 OM3914STM OM3914NTM OM3914NKM TYPICAL APPLICATIONS MULTIPLE TRACKING REGULATORS C1 10µF + R2 IADJ + C2 5µF + C3 2µF VREF VOUT = VREF + VIN -VOUT 1+ R2 R1 ) + IADJ (R2) R2* R3 1.5k 1% ADJ. VIN VOUT OM3914 -VIN + R1 1k 1% ADJ. R2 VOUT + 2µF Solid Tantalum -VOUT2 IN4002 OM3914 + 2µF Solid Tantalum -VOUT3 2µF + + IN4002 + 2µF HIGH STABILITY REGULATOR 7V LM329B ADJ. R1 VOUT OM3914 VIN 5µF + C1 2µF Solid Tantalum -VOUT1 2µF -VIN ( R2 R1 ADJ. VIN VOUT OM3914 -VIN + C3 10µF VIN 2µF Solid Tantalum ADJ. VOUT R#N OM3914 -VOUT *R2 = VOUT 9.08 X 10-3 MECHANICAL OUTLINES TO-3 .200 .190 .420 .410 .045 .035 Tab 4 .665 .645 .150 .140 .537 .527 1.197 1.53 REF. 1.177 0.875 MAX. 0.135 MAX. .430 .410 0.450 0.250 .038 MAX. .750 .500 3.3 1 .035 .025 0.312 MIN. SEATING PLANE .005 Front View 2 3 .100 TYP. CASE T Pin 1 - Adjust Pin 2 - VIN Pin 3 - VOUT Tab - VIN 0.675 0.655 0.188 R. MAX. .120 TYP. CASE U Pin 1 - Adjust Pin 2 - VIN Pin 3 - VOUT Tab - No Connection NOTES: • Case is metal/hermetically sealed • Isolated Tab 0.043 0.038 0.225 0.205 2 PLCS. OM3914NKM Pin 1 – Adjust Pin 2 – Vout Case – Vin 0.161 0.151 0.525 R. MAX. 0.440 0.420