OMNIREL OM3914STM, OM3914NTM, OM3914NKM Datasheet

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