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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 @ 25C
Power Dissipation Case 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1 W Case-All Others. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 W Input - Output Voltage Differential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 V Operating Junction Temperature Range . . . . . . . . . . . . . . . . . . . . . - 55C to + 150C Storage Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 65C to + 150C Lead Temperature (Soldering 10 seconds) . . . . . . . . . . . . . . . . . . . . . . . . . . . 300C Thermal Resistance, Junction to Case: Case 2, LCC-20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17C/W Case U & M, TO-257 (Isol) and SMD-3 . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2C/W Case T&N, TO-257 (Non-Isol) and SMD-1 . . . . . . . . . . . . . . . . . . . . . . . 3.5C/W Case Y, TO-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.0C/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). . . . . . . . . . . . . . . . - 55C to + 125C Input Voltage Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -4.25 to -41.25 VDC
4 11 R2 Supersedes 1 07 R1
3.5
3.5 - 21
OM1325NTM, OM1325STM, OM1325NKM, OM1325SMM, OM1325NMM, OM1325N2M
ELECTRICAL CHARACTERISTICS
Parameter Reference Voltage Symbol VREF
-55C TA 125C, IL = 8mA (unless otherwise specified) OM1325NTM, OM1325STM, OM1325NKM, OM1325SMM, OM1325NMM
Test Conditions VDIFF = 3.0V, TA = 25C VDIFF = 3.0V VDIFF = 40V Line Regulation (Note 1) Load Regulation (Note 1) RLOAD RLINE 3.0 V VDIFF 40V, TA = 25C 3.0V VDIFF 40V VDIFF = 5V, 8mA IL 1.5A VDIFF = 12V, 8mA IL 1.5A, TA = 25C VDIFF 40V, 8mA IL 1.5A, TA = 25C VDIFF = 40V, 8mA IL 1.5A Thermal Regulation VRTH Vin = -14.6V, IL = 1.5A Pd = 20 Watts, t = 10 ms, TA = 25C Ripple Rejection (Note 2) Adjustment Pin Current IAdj RN f = 120 Hz, Vout = Vref CAdj = 10 F VDIFF = 3.0V VDIFF = 40V Adjustment Pin Current Change IAdj (line) IAdj (load) Miminum Load Current ILmin VDIFF = 5V, 8mA IL 1.5A VDIFF = 3.0V, Vout = -1.4V (forced) VDIFF = 10V, Vout = -1.4V (forced) VDIFF = 40V, Vout = -1.4V (forced) Current Limit (Note 2) ICL VDIFF 5V VDIFF = 40V, TA = 25C 3V VDIFF 40V Min. -1.262 Max. -1.238 -1.220 -1.220 4.5 13.8 25 25 25 50 5 mV mV mV V Unit
* * * *
-1.280 -1.280 -4.5 -13.8 -25 -25 -25
*
-50 -5
* * * * * * * * *
66
dB
100 100 A
-5
5
A
-5
5 3.0 3.0 5.0
A
mA
1.5 0.24
3.5 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
Standard Military Drawing Number 7703406M 7703406U 7703406T 7703406Y 7703406N 77034062 Omnirel Part Number OM1325SMM OM1325STM OM1325NTM OM1325NKM OM1325NMM OM1325N2M Omnirel Package Designation SMD-3 TO-257 (Isolated) TO-257 (non-Isolated) TO-3 SMD-1 LCC-20
3.5
3.5 - 22
OM1325NTM, OM1325STM, OM1325NKM, OM1325SMM, OM1325NMM, OM1325N2M
ELECTRICAL CHARACTERISTICS
OM1325N2M
Parameter Reference Voltage Symbol VREF
-55C TA 125C, IL = 8mA (unless otherwise specified)
Min. -1.262 Max. -1.238 -1.220 -1.220 4.5 13.8 25 25 25 50 5 mV mV mV V Unit
Test Conditions VDIFF = 3.0V, TA = 25C VDIFF = 3.0V VDIFF = 40V 3.0 V VDIFF 40V, TA = 25C 3.0V VDIFF 40V VDIFF = 5V, 8mA IL 200 mA VDIFF = 15V, 8mA IL 200m, ATA = 25C VDIFF 40V, 8mA IL 150 mA, ATA = 25C VDIFF = 40V, 8mA IL 50 mA
* * * *
-1.280 -1.280 -4.5 -13.8 -25 -25 -25
Line Regulation (Note 1) Load Regulation (Note 1)
RLINE
RLOAD
*
-50 -5
Thermal Regulation
VRTH
Vin = -16.25V, IL =330 mA Pd =5 Watts, t = 10 ms, TA = 25C
Ripple Rejection (Note 2) Adjustment Pin Current
RN
f = 120 Hz, Vout = Vref CAdj = 10 F VDIFF = 3.0V VDIFF = 40V
* * * * * * * * *
66
dB
IAdj
100 100 A
Adjustment Pin Current Change
IAdj (line) IAdj (load) VDIFF = 5V, 8mA IL 500 mA VDIFF = 3.0V, Vout = -1.4V (forced) VDIFF = 10V, Vout = -1.4V (forced) VDIFF = 40V, Vout = -1.4V (forced) VDIFF 5V VDIFF = 40V, TA = 25C -5 5 3.0 3.0 5.0 0.5 0.15 1.8 0.65 A mA A 3V VDIFF 40V -5 5 A
Miminum Load Current
ILmin
Current Limit (Note 2)
ICL
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
IPROG + CIN* 1.0F R2 R1 120 CO** + 1.0F
* Cin is required if regulator is located more than 4 inches from power supply filter. A 1 F solid tantalum or 10 F aluminum electrolytic is recommended. ** Co is necessary for stability. A 1 F solid tantalum or 10 F aluminum electrolytic is recommended.
3.5
IAdj VIN -VIN OM1325STM VOUT -VOUT
Vout = -1.25 V (1 +R2) R1
3.5 - 23
OM1325NTM, OM1325STM, OM1325NKM, OM1325SMM, OM1325NMM, OM1325N2M
MECHANICAL OUTLINE
.425
.420 .410
.200 .190 .045 .035 .665 .645 .537 .527
1
.100 .200
3 2
.035 WIDE FLAT 3 PLCS.
.425
.150 .140
.350 MIN.
123
.430 .410
.020
.020 .115 .160
.080
.038 MAX.
OM1325SMM
.750 .500 .005
Front View Pin 1 - Adjust Pin 2 - Output Pin 3 - Input Case - Isolated
.035 .025
.100 TYP.
.120 TYP.
OM1325STM Isolated
Front View Pin 1 - Adjust Pin 2 - Input Pin 3 - Output Tab - Isolated
OM1325NTM Non-Isolated
Front View Pin 1 - Adjust Pin 2 - Input Pin 3 - Output Tab - Input
.140 .015 .075 .157
.140
.140 .075
1
2
.030 MIN.
.415
3
.062
.375
OM1325NMM
1.197 1.177 0.675 0.655 0.440 0.420
.065 .020 X45 REF.
(.003)
1.53 REF. 0.875 MAX. 0.135 MAX. 0.450 0.250 0.312 MIN. SEATING PLANE 0.043 0.038 2 PLCS. 0.225 0.205 0.161 0.151
Pin 1 - Adjust Pin 2 - Output Pin 3 - Input
.009 R. 20 PLCS. .040
4
.010
0.188 R. MAX.
.075 (.010) TYP.
9
2 1
.025 TYP. .085
3 1 19
.160 SQ. REF.
13 18 14
0.525 R. MAX.
.003
.025 SQ. TYP.
.050 TYP. .040 X45 REF (3 PL)
.050 (.005) TYP.
OM1325N2M OM1325NKM
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
3.5
For additional information please see the mechanical outline section.

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