OM1325SMM OM1325NMM OM1325NKM OM1325NTM OM1325STM OM1325N2M 1.5 AMP NEGATIVE ADJUSTABLE VOLTAGE REGULATOR APPROVED TO DESC DRAWING 7703406 Three Terminal, Precision Adjustable Negative Voltage Regulator In Hermetic Style Packages (LM137A) Please see mechanical outlines herein FEATURES • • • • • • Similar To Industry Standard LM137A Approved To DESC Standardized Military Drawing Number 7703406 Built In Thermal Overload Protection Short Circuit Current Limiting Available In Six Package Styles Maximum Output Voltage Tolerance Is Guaranteed to + 1% DESCRIPTION These three terminal negative regulators are supplied in hermetically sealed packages. All protective features are designed into the circuit, including thermal shutdown, current-limiting, and safe-area control. With heat sinking, these devices can deliver up to 1.5 amps of output current. The LCC-20 device is limited to .5 amps. The unit also features output voltages that can be fixed from -1.2 volts to -37 volts using external resistors. ABSOLUTE MAXIMUM RATINGS Tc @ 25°C Power Dissipation Case 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1 W Case-All Others. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 W Input - Output Voltage Differential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 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: Case 2, LCC-20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17°C/W Case U & M, TO-257 (Isol) and SMD-3 . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2°C/W Case T&N, TO-257 (Non-Isol) and SMD-1 . . . . . . . . . . . . . . . . . . . . . . . 3.5°C/W Case Y, TO-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.0°C/W Maximum Output Current: Case 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 A Case-All Others. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5A Recommended Operating Conditions: Output Voltage Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-1.2 to -37 VDC Ambient Operating Temperature Range (TA). . . . . . . . . . . . . . . . - 55°C to + 125°C Input Voltage Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -4.25 to -41.25 VDC 4 11 R2 Supersedes 1 07 R1 3.5 - 21 3.5 OM1325NTM, OM1325STM, OM1325NKM, OM1325SMM, OM1325NMM, OM1325N2M ELECTRICAL CHARACTERISTICS -55°C ≤ TA ≤ 125°C, IL = 8mA (unless otherwise specified) OM1325NTM, OM1325STM, OM1325NKM, OM1325SMM, OM1325NMM Parameter Symbol Test Conditions Min. Max. Reference Voltage VREF VDIFF = 3.0V, TA = 25°C -1.262 -1.238 -1.280 -1.220 -1.280 -1.220 -4.5 4.5 -13.8 13.8 -25 25 VDIFF = 12V, 8mA ≤ IL ≤ 1.5A, TA = 25°C -25 25 VDIFF 40V, 8mA ≤ IL ≤ 1.5A, TA = 25°C -25 25 -50 50 -5 5 VDIFF = 3.0V VDIFF = 40V Line Regulation RLINE 3.0 V ≤ VDIFF ≤ 40V, TA = 25°C RLOAD VDIFF = 5V, 8mA ≤ IL ≤ 1.5A 3.0V ≤ VDIFF ≤ 40V (Note 1) Load Regulation (Note 1) VDIFF = 40V, 8mA ≤ IL ≤ 1.5A Thermal Regulation VRTH • • • • • Vin = -14.6V, IL = 1.5A Unit V mV mV mV Pd = 20 Watts, t = 10 ms, TA = 25°C Ripple Rejection RN f = 120 Hz, Vout = Vref IAdj VDIFF = 3.0V (Note 2) Adjustment Pin Current • 66 dB CAdj = 10 µF VDIFF = 40V • • 3V ≤ VDIFF ≤ 40V • -5 (load) VDIFF = 5V, 8mA ≤ IL ≤ 1.5A VDIFF = 3.0V, Vout = -1.4V (forced) • • • • • -5 ILmin Adjustment Pin ∆IAdj Current Change (line) 100 100 µA 5 µA 5 µA ∆IAdj Miminum Load Current VDIFF = 10V, Vout = -1.4V (forced) VDIFF = 40V, Vout = -1.4V (forced) Current Limit VDIFF ≤ 5V ICL VDIFF = 40V, TA = 25°C (Note 2) 3.0 3.0 mA 5.0 1.5 3.5 0.24 1.2 A Notes: 1. Load and Line Regulation are specified at a constant junction temperature. Pulse testing with low duty cycle is used. Changes in output voltage due to heating effects must be taken into account separately. 2. If not tested, shall be guaranteed to the specified limits. 3. The • denotes the specifications which apply over the full operating temperature range. PART NUMBER DESIGNATOR 3.5 Standard Military Drawing Number Omnirel Part Number 7703406M 7703406U 7703406T 7703406Y 7703406N 77034062 OM1325SMM OM1325STM OM1325NTM OM1325NKM OM1325NMM OM1325N2M 3.5 - 22 Omnirel Package Designation SMD-3 TO-257 (Isolated) TO-257 (non-Isolated) TO-3 SMD-1 LCC-20 OM1325NTM, OM1325STM, OM1325NKM, OM1325SMM, OM1325NMM, OM1325N2M ELECTRICAL CHARACTERISTICS -55°C ≤ TA ≤ 125°C, IL = 8mA (unless otherwise specified) OM1325N2M Parameter Symbol Test Conditions Min. Max. Reference Voltage VREF VDIFF = 3.0V, TA = 25°C -1.262 -1.238 -1.280 -1.220 -1.280 -1.220 VDIFF = 3.0V • • VDIFF = 40V Line Regulation 3.0 V ≤ VDIFF ≤ 40V, TA = 25°C RLINE 3.0V ≤ VDIFF ≤ 40V (Note 1) Load Regulation VDIFF = 5V, 8mA ≤ IL ≤ 200 mA RLOAD (Note 1) • • VRTH Ripple Rejection RN 4.5 -13.8 13.8 -25 25 VDIFF = 15V, 8mA ≤ IL ≤ 200m, ATA = 25°C -25 25 VDIFF 40V, 8mA ≤ IL ≤150 mA, ATA = 25°C -25 25 -50 50 -5 5 VDIFF = 40V, 8mA ≤ IL ≤ 50 mA Thermal Regulation -4.5 • Vin = -16.25V, IL =330 mA Unit V mV mV mV Pd =5 Watts, t = 10 ms, TA = 25°C • f = 120 Hz, Vout = Vref (Note 2) 66 dB CAdj = 10 µF VDIFF = 3.0V VDIFF = 40V • • 3V ≤ VDIFF ≤ 40V • -5 (load) VDIFF = 5V, 8mA ≤ IL ≤ 500 mA VDIFF = 3.0V, Vout = -1.4V (forced) • • • • • -5 ILmin Adjustment Pin Current IAdj Adjustment Pin ∆IAdj Current Change (line) 100 100 µA 5 µA 5 µA ∆IAdj Miminum Load Current VDIFF = 10V, Vout = -1.4V (forced) VDIFF = 40V, Vout = -1.4V (forced) Current Limit VDIFF ≤ 5V ICL VDIFF = 40V, TA = 25°C (Note 2) 3.0 3.0 mA 5.0 0.5 1.8 0.15 0.65 A Notes: 1. Load and Line Regulation are specified at a constant junction temperature. Pulse testing with low duty cycle is used. Changes in output voltage due to heating effects must be taken into account separately. 2. If not tested, shall be guaranteed to the specified limits. 3. The • denotes the specifications which apply over the full operating temperature range. TYPICAL APPLICATION * Cin is required if regulator is located more than 4 inches from power supply filter. A 1 µF solid tantalum or 10 µF aluminum electrolytic is recommended. IPROG + CIN* + R2 1.0µF CO** R1 120Ω 1.0µF ** Co is necessary for stability. A 1 µF solid tantalum or 10 µF aluminum electrolytic is recommended. IAdj VIN -VIN VOUT OM1325STM -VOUT 3.5 - 23 Vout = -1.25 V (1 +R2) R1 3.5 OM1325NTM, OM1325STM, OM1325NKM, OM1325SMM, OM1325NMM, OM1325N2M MECHANICAL OUTLINE .425O .200O .190O 1 O .045O .035O .100O .200O 3 O .420O .410O .425O .035 WIDEO FLAT 3 PLCS.O 2 .665O .645O .150O .140O .537O .527O O .350 MIN.O .430O .410O 1 2 3 O ± .020O .115O .160O .020O .080 O .038 MAX.O OM1325SMM .750O .500O .120 TYP.O .100 TYP.O .035O .025O Front View Pin 1 - Adjust Pin 2 - Output Pin 3 - Input Case - Isolated O .005O OM1325STM Isolated OM1325NTM Non-Isolated Front View Pin 1 - Adjust Pin 2 - Input Pin 3 - Output Tab - Isolated Front View Pin 1 - Adjust Pin 2 - Input Pin 3 - Output Tab - Input .140 .015 .140 .140 1 2 .075 .075 .157 .415 3 .062 .375 .030 MIN. OM1325NMM Pin 1 - Adjust Pin 2 - Output Pin 3 - Input 1.197 1.53 REF. 1.177 0.875 MAX. 0.675 0.655 0.188 R. MAX. 0.135 MAX. .009 R. 20 PLCS. .065 0.440 0.420 .020 X45° REF. (±.003) 0.450 0.250 0.043 0.038 .010 9 .160 SQ. REF. 1 .085 0.312 MIN. SEATING PLANE .075 (±.010) TYP. 4 3 .025 TYP. 2 1 .040 13 19 0.225 0.205 0.161 0.151 0.525 R. MAX. .003 .025 SQ. TYP. 18 .050 (±.005) TYP. 2 PLCS. 14 .050 TYP. .040 X45° REF (3 PL) OM1325N2M OM1325NKM 3.5 Pin 1 - Adjust Pin 2 - Output Case - Input Pin 1 VOUT Pin 2 VOUT(Sense) Pin 3 NC Pin 4 NC Pin 5 NC Pin 6 NC Pin 7 NC Pin 8 NC Pin 9 NC Pin 10 NC Pin 11 Pin 12 Pin 13 Pin 14 Pin 15 Pin 16 Pin 17 Pin 18 Pin 19 Pin 20 VIN NC NC NC NC ADJUST NC NC NC NC For additional information please see the mechanical outline section.