OMNIREL OM3957NMM, OM3957STM, OM3957SMM Datasheet

OM3957NMM	OM3957STM
OM3957SMM

1.3 AMP LOW DROPOUT 3.3 FIXED VOLTAGE

REGULATOR APPROVED TO SMD 5962-98590

			Three Terminal, 3.3 Volt Positive Fixed
			Low Dropout Voltage Regulator In
			Hermetic JEDEC TO-257AA
Please see mechanical			and Surface Mount Packages
	outlines herein
FEATURES
•	Similar To Industry Standard LT1086 -3.3
•	Approved To DS C C Standardized Military Drawing Number 5962-98590

•Built In Thermal Overload Protection

•Short Circuit Current Limiting

•Available In Isolated Package

•Output Voltage Tolerance is Guaranteed To ±1%

•Guaranteed Dropout Voltage At Multiple Current Levels

DESCRIPTION

This 3.3 volt fixed voltage regulator is designed to provide 1.3A of current with a higher efficiency than conventional voltage regulators. This device is designed to operate down to 1 volt input to output differential and the 1.5V dropout voltage is guaranteed at the maximum output current. This device is ideally suited for those systems where high reliability, small size and low weight are required. The isolated package simplifies the system assembly methods.

ABSOLUTE MAXIMUM RATINGS @ 25°C

Input Voltage .... .................................................... 30V

OutputCurrent........................................................1.3A

Operating Junction Temperature..................................-65°Cto+150°C

Storage TemperatureRange....................................-65°Cto+150°C

Lead Temperature(Soldering10seconds).... ............................... 300°C

Power Dissipation (Pd)............................ ... .......... InternallyLimited

Thermal Resistance:

qJC (Isolated)..... .............................................. 4.2°C/W qJA .... ....................................................... 42°C/W

	Part Number Designator
Standard Military Drawing	Omnirel Part Number
5962-9859001MMA	OM3957SMM
5962-9859001M U A	OM3957STM
5962-9859001MNA	OM3957NMM
9 01 R1	3.3- 1
supersedes 8 07 R0

OM3957NMM

OM3957STM

OM3957SMM

ELECTRICAL CHARACTERISTICS -55°C

TA

125°C (unless otherwise specified)

Parameter

Symbol

Test Conditions

Min.

Max.

Unit

Output Voltage

VOUT

VIN =5.0V,IOUT = 10 mA

3.267

3.333

V

TA = 25° C

4.75 V

VIN

18 V,

•

3.235

3.365

V

10 mA

IOUT

1.3 A

Line Regulation

³VOUT

4.5V VIN

18 V, IOUT = 0 A, TA = 25° C

10

m V

(Note 1)

³VIN

4.5V

VIN

18 V, IOUT = 0 A

•

12

Load Regulation

³VOUT

VIN = 5.0 V, 0A

IOUT

1.3 A

15

m V

(Note 1)

I³OUT

TA = 25° C

VIN = 5.0 V, 0A

IOUT

1.3 A

•

25

m V

Dropout Voltage

VD O

IOUT = 1.3 A, ³VREF = 1%

•

1.5

V

Thermal Regulation

-

30 ms pulse, TA = +25° C

0.04

%/W

Ripple Rejection

³VIN

f = 120 Hz, CAdj = 25 µF,

•

60

dB

³VOUT

COUT = 25 µF (tantalum), IOUT = 1.3 A,

VIN = 6.3 V

Quiescent Current

IQ

VIN = 18 V

•

10

m A

Current Limit

ILim

VIN = 8.3 V

•

1.3

2.5

A

VIN = 28.3 V

•

.050

-

A

Temperature Stability

³VOUT

-55° C

TJ

+125° C

1.5

%

(Note 2)

³T

Long Term Stability

³VOUT

TA = +125° C, t = 1000 hrs

1.0

%

(Note 2)

³T

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 13 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.