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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 @ 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 Junction to Case: (TO-257, Isolated) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.5C/W (TO-257, Non-Isolated) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.3C/W (TO-3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.0C/W Recommended Operating Conditions: Output Voltage Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -3V to -15 V Ambient Operating Temperature Range (TA) . . . . . . . . . . . . . . . . - 55C to + 125C Input Voltage Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 5V to -35 V
3.3
1 08 R2 Supersedes 4 11 R1
3.3 - 119
OM3914STM OM3914NTM OM3914NKM
ELECTRICAL CHARACTERISTICS
Parameter Reference Voltage Symbol VREF VOUT VIN VOUT IOUT
-55C TA +125C (unless otherwise specified)
Min. -1.238 Max. -1.262 V -1.215 -1.285 0.015 %/V 0.04 50 mV 75 1.0 % 1.5 0.02 56 %/W dB 53 70 dB 60 100 2.0 A 5.0 5.0 mA 3.0 3.0 6.0 A 3.0 0.5 2.5 A 0.5 1.5 % A Unit
Test Conditions VIN - VOUT = 5 V, IOUT = 5 mA, TA = 25 C 3 V VIN - VOUT 35 V
* * * *
Line Regulation (Note 1) Load Regulation (Note 1)
3 V VIN - VOUT 35 V VOUT 5 V, TA = 25 C 10 mA IOUT IMAX. VOUT 5.0 V 10 mA IOUT IMAX.
Thermal Regulation Ripple Rejection (Note 2)
VIN VREF
30 ms pulse, TA = 25 C VOUT = -10 V, f = 120 Hz, CAdj = 0 VOUT = -10 V, f = 120 Hz, CAdj = 10 F
* * * * * * * * * *
Adjust Pin Current Adjust Pin Current Change
IAdj IAdj
VDIFF = 35 V, IL = 10 mA 10 mA IOUT IMAX. 3 V VIN - VOUT 35 V VIN - VOUT 35 V VIN - VOUT 10 V
Minimum Load Current
IMin
Current Limit
ILim
VIN - VOUT 10 V VIN - VOUT = 35 V
Temperature Stability (Note 2) Long Term Stability (Note 2)
VOUT T VOUT T
-55 C TJ +125 C
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 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
5962-8774101U 5962-8774101T 5962-8774101X "U" = Isolated "T" = Non-Isolated
Omnirel Part Number
OM3914STM OM3914NTM OM3914NKM
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
OM3914STM OM3914NTM OM3914NKM
TYPICAL PERFORMANCE CHARACTERISTICS
DROPOUT VOLTAGE
Input-Output Differential (V) 2.8 2.6 2.4 2.2 2.0 1.8 1.6 1.4 1.2
TJ = -55C TJ = -25C
TEMPERATURE STABILITY
1.270 Reference Voltage (V) 1.260 1.250 1.240 1.230 -75 -50 -25 0 25 50 75 100125150 Temperature (C)
TJ = -150C
0.5 1.0 1.5 2.0 2.5 3.0 Output Current (A)
MINIMUM LOAD CURRENT
1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0
RIPPLE REJECTION
100 Ripple Rejection (dB)
CADJ = 10F
Current (mA)
TJ = -55C
80 60
CADJ = 0
TJ = 150C
TJ = 25C
40
VIN = -15 V
20
VOUT = -10 V f = 120Hz, TJ = 25C
0 10 20 30 40 Input-Output Differential (V)
0 0.01
0.1 1 Output Current (A)
10
LOAD REGULATION
GUARANTEED MINIMUM OUTPUT CURRENT
5
3.3
0.8 0.4 0 -0.4 -0.8 0 0.8 1.6 2.4 3.2 Output Current (A) 4.0 Output Current (A) 4 3 2 1 0 0 5 10 15 20 25 30 35 Input-Output Differential (V) Output Voltage Deviation (%)
3.3 - 121
OM3914STM OM3914NTM OM3914NKM
TYPICAL APPLICATIONS
MULTIPLE TRACKING REGULATORS
C1 10F C2 5F + + IADJ VREF ADJ. VIN VOUT OM3914 VOUT = VREF R2 + C3 2F R1
-VIN VIN ADJ. R1 VOUT IN4002 + 2F + C3 10F R2 + C1 2F Solid Tantalum -VOUT1
-VIN
-VOUT
OM3914
(
1+ R2 R1
)
+ IADJ (R2)
+ 2F VIN ADJ. R2 VOUT IN4002
HIGH STABILITY REGULATOR
7V LM329B + 5F ADJ. VIN VOUT OM3914 *R2 = R3 1.5k 1% R1 1k 1% R2* + 2F Solid Tantalum -VOUT VOUT 9.08 X 10-3
+ 2F
OM3914
+ 2F Solid Tantalum -VOUT2
VIN
R#N
ADJ. VOUT
OM3914
+ 2F Solid Tantalum -VOUT3
-VIN
MECHANICAL OUTLINES
.420 .410 .200 .190
TO-3
.045 .035
1.53 REF. 0.875 MAX. 1.197 1.177 0.675 0.655 0.440 0.420
Tab
4
.150 .140 .665 .645 .537 .527 .430 .410
0.135 MAX. 0.450 0.250
0.188 R. MAX.
.038 MAX.
0.043 0.038 2 PLCS.
0.312 MIN. SEATING PLANE 0.225 0.205 0.161 0.151 0.525 R. MAX.
3.3
1
.035 .025
.750 .500
.005
23
.100 TYP. .120 TYP.
Front View
CASE U Pin 1 - Adjust Pin 2 - VIN Pin 3 - VOUT Tab - No Connection
CASE T Pin 1 - Adjust Pin 2 - VIN Pin 3 - VOUT Tab - VIN
OM3914NKM Pin 1 - Adjust Pin 2 - Vout Case - Vin
NOTES: * Case is metal/hermetically sealed * Isolated Tab

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