OMNIREL OM185SR, OM185SM, OM186SR, OM186SM, OM185NR Datasheet

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3.5

Three Terminal, Adjustable Low Dropout

2.0 Amp And 1.0 Amp Positive
Voltage Regulators

4 11 R0

SURFACE MOUNT LOW DROPOUT POSITIVE
ADJUSTABLE REGULATOR

FEATURES

• Hermetic Surface Mount Package

• Operates Down To 1V Dropout, 1.5V @ Max. Current

• .020% Line Regulation Typically

• .050% Load Regulation Typically

• 1% Reference Voltage

• Electrically Equivalent To LT1085 And LT1086

• Available Hi-Rel Screened

DESCRIPTION

These three terminal positive adjustable voltage regulators in a surface mount
package are designed to provide 2.0 Amps and 1.0 Amp with higher efficiency than
conventional voltage regulators. The devices are designed to operate to 1 Volt input
to output differential and the dropout voltage is specified as a function of load current.
These devices are ideally suited for Hi-Rel applications where surface mount, small
size, hermeticity and high reliability are required.

ABSOLUTE MAXIMUM RATINGS@ 25°C

Input Voltage ...........................................................35 V

Operating Junction Temperature Range ........................- 55°C to + 150°C

Storage Temperature Range ..................................- 55°C to + 150°C

Output Current - OM185SM..........................................2.0 A

Output Current - OM186SM..........................................1.0 A

Thermal Resistance - OM185SM ........................................9°C/W

Thermal Resistance - OM186SM .......................................14°C/W

Lead Temperature (Soldering 10 Seconds)................................280°C

OM185SM/SR/NR
OM186SM/SR/NR

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OM185SM/SR/N R - OM186SM/SR/NR

3.5

ELECTRICAL CHARACTERISTICS (T

J

= -55°C to +125°C)

Parameter Conditions Min. Max. Units

Reference Voltage I

OUT

= 10mA, Tj= 25°C

(VIN- V

OUT

) = 3V 1.238 1.262 V

10mA ≤ I

OUT≤IFULL LOAD

1.5V ≤ (VIN- V

OUT

) ≤ 25 V (Note 3) • 1.220 1.270 V

Line Regulation I

LOAD

= 10mA, 1 .5V ≤(VIN-V

OUT

) ≤ 15V, Tj= 25°C 0.25 %

15V ≤ (VIN- V

OUT

) ≤ 35V (Notes 1 & 2) • 0.6 %

Load Regulation (VIN- V

OUT

) = 3V

10mA ≤ I

OUT≤IFULL LOAD

Tj= 25°C (Notes 1, 2, & 3) 1.0 %

• 1.2 %

Dropout Voltage ∆V

REF

= 1%, I

OUT

= I

FULL LOAD

• 1.5 V

Current Limit

OM185SM (VIN- V

OUT

) = 5V • 2.0 A

(VIN- V

OUT

) = 25V • 0.10 A

OM186SM (VIN- V

OUT

) = 5V • 1.0 A

(VIN- V

OUT

) = 25V • 0.05 A

Minimum Load Current (VIN- V

OUT

) = 25V • 15 mA

Thermal Regulation TA= 25°C, 30 ms pulse

OM185SM 0.025 %/W
OM186SM 0.055 %/W

Ripple Rejection f = 120Hz

C

ADJ

= 25µF Tantalum

I

OUT

- I

FULL LOAD (VIN

- V

OUT

) = 3V 60 dB
Adjust Pin Current TJ= 25°C 120 µA
Adjust Pin Current Change 10mA ≤ I

OUT≤IFULL LOAD

1.5V ≤ (VIN- V

OUT

) ≤ 25V • 5 µA
Temperature Stability -55°C ≤ TJ≤ +150°C 1 %
Long Term Stability TA= 125°C, 1000 Hrs. 1 %

Note 1: Load and line regulation are measured at a constant junction temperature by low duty cycle pulse testing.
Note 2: Line and load regulation are guaranteed up to the maximum power dissipation (OM185/20W, OM186/10W).

Power dissipation is determined by the input/output differential and the output current. Guaranteed maximum
power dissipation will not be available over the full input/output voltage range.

Note 3: I

FULL LOAD

curve is defined as the minimum value of current limit as a function of input to output voltage. Note that

power dissipation is only achievable over a limited range of input to output voltage.

Note 4: Dropout voltage is specified over the full output current range of the device.

The •denotes the specifications which apply over the full operating temperature range.