OMNIREL OM1840SCM, OM1840NKM, OM1840NCM Datasheet

3.3 - 75

3.3

OM1840NKM

1 08 R3
Supersedes 4 11 R2

5 AMP LOW DROPOUT POSITIVE ADJUSTABLE
REGULATOR APPROVED TO DESC DRAWING 5962-89521

FEATURES

• Similar To Industry Standard LT1084

• Approved To DESC Standardized Military Drawing Number 5962-89521

• 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-258 Available in Isolated and Non-Isolated Packages

DESCRIPTION

This three terminal positive adjustable voltage regulator is designed to provide 5A
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-258 and
TO-3 packages, this device is ideally suited for Military applications where small size
and high reliability is required.

ABSOLUTE MAXIMUM RATINGS @ 25°C

Power Dissipation (Pd) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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:

θJC(TO-258 Isolated) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.0°C/W

θJC(TO-258 Non-Isolated) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.3°C/W

θJC(TO-3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.0°C/W

Maximum Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.0 A

Recommended Operating Conditions:

Output Voltage Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.3V to 15 V

Ambient Operating Temperature Range (TA) . . . . . . . . . . . . . . . . - 55°C to + 125°C

Input Voltage Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5V to 25 V

OM1840SCM
OM1840NCM

Three Terminal, Positive Adjustable
Low Dropout Voltage Regulator In
Hermetic Packages

3.3 - 76

3.3

OM1840SCM OM1840NCM OM1840NKM

ELECTRICAL CHARACTERISTICS -55°C ≤ T

A

≤ +125°C (unless otherwise specified)

Parameter Symbol Test Conditions Min. Max. Unit

Reference Voltage V

REF

VIN- V

OUT

 = 3.0 V, 1.238 1.262 V

I

OUT

= 10 mA, TA= 25° C

1.5 V ≤V

IN

- V

OUT

≤25 V, • 1.225 1.270 V

I

OUT

= 10 mA, IFL= 3.0 A

Line Regulation ∆V

OUT

1.5 V ≤VIN- V

OUT

≤15 V, 0.2 %

(Note 1) ∆V

IN

I

OUT

= 10 mA, TA= 25° C

15 V ≤V

IN

- V

OUT

≤35 V, • 0.5 %

I

OUT

= 10 mA

Load Regulation ∆V

OUT

VIN- V

OUT

 = 3.0 V, TA= 25° C 0.3 %

(Note 1) ∆I

OUT

I

OUT

= 10 mA, IFL= 3.0 A

• 0.4 %

Dropout Voltage V

DO

IFL= 3.0 A, ∆V

REF

= 1% • 1.5 V

Thermal Regulation - 30 ms pulse, T

A

= +25° C 0.015 %/W

Ripple Rejection ∆V

IN

f = 120 Hz, C

Adj

= 25 µF, • 60 dB

∆V

OUT

C

OUT

= 25 µF (tantalum), IFL= 3.0 A,

V

IN

- V

OUT

 = 3.0 V

Adjust Pin Current I

Adj

1.5 V ≤VIN- V

OUT

≤25 V, • 120 µA

I

OUT

= 10 mA, IFL= 3.0 A

Adjust Pin Current Change ∆I

Adj

1.5 V ≤VIN- V

OUT

≤25 V, • 5.0 µA

10 mA ≤ I

OUT

≤ 3.0 A

Miminum Load Current I

Min

VIN- V

OUT

 = 25 V • 10 mA

Current Limit I

Lim

VIN- V

OUT

≤5.0 V • 5.5 A

V

IN

- V

OUT

 = 25 V • 0.3 A

Temperature Stability ∆V

OUT

-55° C ≤ TJ≤ +125° C • 1.5 %

(Note 2) ∆T

Long Term Stability ∆V

OUT

TA= +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 45 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 NUMBER DESIGNATOR

Standard Military Drawing Number Omnirel Part Number

8952101Y OM1840SCM

8952101Z OM1840NCM

8952101X OM1840NKM

“Y” = Isolated

“Z” = Non-Isolated

Part Numbering System

Voltage R egula tors

OM - 1840 -

S - C - M

Company
Identification

Part
Number

S= Isolated
N= N on
isola ted

Package
(see Package codes*)

Screening
M= MIL-M
3853 5

* Package Codes:

K= TO-204AA (TO-3)
Z= TO-259AA (Z-Tab)
C = TO-258AA

isola

3.3 - 77

3.3

OM1840NKM OM1840SCM OM1840NCM

TYPICAL PERFORMANCE CHARACTERISTICS

-55°C ≤ Tj ≤ 150°C

0°C ≤ Tj ≤ 125°C

LOAD REGULATION

0.10

0.05

-0.05

-0.10

-0.15

OUTPUT VOLTAGE DEVIATION (%)

-0.20

100

90

80

70

60

50

40

30

20

ADJUSTMENT PIN CURRENT (µA)

10

0

0

-50

0 100

TEMPERATURE (°C)

ADJUSTMENT PIN CURRENT

TEMERATURE (°C)

∆I= 5A

SHORT CIRCUIT CURRENT

10

9

8

7

6

5

4

3

2

SHORT CIRCUIT CURRENT (A)

I

FULL LOAD

1

150-25 25 50 75 125

0

0

5 101520253035

INPUT/OUTPUT DIFFERENTIAL (V)

150°C

25°C

-55°C

DROPOUT VOLTAGE

2

1

MINIMUM INPUT/OUTPUT DIFFERENTIAL (V)

150-50 -25 50 75 12525 1000

0

• INDICATES GUARANTEED TEST POINT

-55°Cj150°C

T

0°Cj125°C

T

Tj= -55°C

Tj= 25°C

T

= 150°C

j

012 3 4 56

OUTPUT CURRENT (A)

TEMPERATURE STABILITY

1.270

1.260

1.250

1.240

REFERENCE VOLTAGE (V)

1.230

-25 0 25 50 75 100 125

-50

TEMPERATURE (°C)

150

MINIMUM OPERATING CURRENT

10

9

8

7

6

5

4

3

2

MINIMUM OPERATING CURRENT (mA)

1

0

Tj= 25°C

Tj= 150°C

Tj= -55°C

300 5 10 15 20 25

INPUT/OUTPUT DIFFERENTIAL (V)

35

3.3

OM1840SCM OM1840NCM OM1840NKM

MECHANICAL OUTLINE

NOTES

• Case is metal/hermetically sealed

• Isolated Tab

V OUT

IN OUT

ADJ

ADJ

IN

VOUT

IOUT

IN

=1.25 )

1+ R2

__
R1

(

2 FEET #18 WIRE*

* THE #18 WIRE ACTS
AS BALLAST RESISTENCE
INSURING CURRENT SHARING
BETWEEN BOTH DEVICES.

= OA TO 15A

R1
120

R2

0.015

OUT

ADJ

IN

10µF

VV

R1
1211%

IN

V

IN

V 16.5V

150µF

C1
10µF*

R2
365
1%

+

+

C

*C1 IMPROVES RIPPLE
REJECTION. X

SHOULD BE

R1 AT RIPPLE FREQUENCY.

~

~

OUT

ADJ

IN

V

IN

V

+

TTL

2N3904

1k

1k

365
1%

121
1%

5V

V

10µF

+

100µF

OUT

ADJ

IN

VV

R1
121

V

C2
100µF

R2
5k

+

*NEEDED IF DEVICE IS FAR FROM FILTER CAPACITORS

†

OUT

VOUT =1.25V )

R2

(

†

+

1

__
R1

C1
10µF

+

TYPICAL APPLICATIONS

Parelleling Regulators Improving Ripple Rejection

1.2V - 15V Adjustable Regulator 5V Regulator with Shutdown

TYPICAL APPLICATIONS

OM1840

OM1840

OM1840

OM1840

OM1840

0.015Ω

Ω

Ω

≥

Ω

Ω

Ω

1.197

1.177

0.675

0.655

0.188 R.
MAX.

0.440

0.420

0.161

0.151

0.525 R.
MAX.

0.225

0.205

SEATING

PLANE

0.312
MIN.

0.450

0.250

0.043

0.038

2 PLCS.

0.135
MAX.

0.875
MAX.

1.53

REF.

MECHANICAL OUTLINE TO-3

PIN OUT

1 Adjust
2V

IN

Case V

OUT

PIN OUT

1 Adjust
2V

OUT

3V

IN

123

.695
.685

.165
.155

.835

.707
.697

.815

.550
.530

.270
.240

.045
.035

.750
.500

.200 TYP.

.065
.055

.140 TYP.

.092 MAX.

.005