OM3914STM
3.3 - 119
3.3
OM3914NKM
1 08 R2
Supersedes 4 11 R1
OM3914STM
OM3914NTM
Three Terminal, Negative Adjustable
Voltage Regulator In Hermetic
Packages
3 AMP NEGATIVE ADJUSTABLE REGULATOR APPROVED
TO DESC DRAWING 5962-87741
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 (P
d
) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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 (T
A
) . . . . . . . . . . . . . . . . - 55°C to + 125°C
Input Voltage Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 5V to -35 V
3.3 - 120
3.3
OM3914STM OM3914NTM OM3914NKM
ELECTRICAL CHARACTERISTICS -55°C ≤ T
A
≤ +125°C (unless otherwise specified)
Parameter Symbol Test Conditions Min. Max. Unit
Reference Voltage V
REF
V
IN
- V
OUT
= 5 V, I
OUT
= 5 mA, T
A
= 25° C -1.238 -1.262
V
3 V ≤V
IN
- V
OUT
≤35 V • -1.215 -1.285
Line Regulation ∆V
OUT
3 V ≤V
IN
- V
OUT
≤35 V
0.015
%/V
(Note 1) ∆V
IN
• 0.04
Load Regulation ∆V
OUT
V
OUT
≤5 V, T
A
= 25° C 50
mV
(Note 1) ∆I
OUT
10 mA ≤ I
OUT
≤ I
MAX.
• 75
V
OUT
≥ 5.0 V 1.0
%
10 mA ≤ I
OUT
≤ I
MAX.
• 1.5
Thermal Regulation - 30 ms pulse, T
A
= 25° C 0.02 %/W
Ripple Rejection ∆V
IN
V
OUT
= -10 V, f = 120 Hz, C
Adj
= 0
56
dB
(Note 2) ∆V
REF
• 53
V
OUT
= -10 V, f = 120 Hz, C
Adj
= 10 µF
70
dB
• 60
Adjust Pin Current I
Adj
V
DIFF
= 35 V, I
L
= 10 mA • 100 µA
Adjust Pin Current Change ∆I
Adj
10 mA ≤ I
OUT
≤ I
MAX.
• 2.0
µA
3 V ≤V
IN
- V
OUT
≤35 V • 5.0
Minimum Load Current I
Min
V
IN
- V
OUT
≤35 V • 5.0
mA
V
IN
- V
OUT
≤10 V • 3.0
Current Limit I
Lim
V
IN
- V
OUT
≤10 V
3.0 6.0
A
• 3.0
V
IN
- V
OUT
= 35 V
0.5 2.5
A
• 0.5
Temperature Stability ∆V
OUT
-55° C ≤ T
J
≤ +125° C
•
1.5 %
(Note 2) ∆T
Long Term Stability ∆V
OUT
T
A
= +125° C, t = 1000 hrs 1.0 %
(Note 2) ∆T
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.
Part Numbering System
Voltage Regulators
OM-3914-S-T-M
Company
Identification
Part
Number
S= Isolated
N= Non isolated
Package
(see Package codes*)
Screening
M= MIL-M 38535
PART NUMBER DESIGNATOR
Standard Military Drawing Number Omnirel Part Number
5962-8774101U OM3914STM
5962-8774101T OM3914NTM
5962-8774101X OM3914NKM
“U” = Isolated
“T” = Non-Isolated
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