OM185ST datasheet(2/5 Pages) ETC

Part #	OM185ST

Description	7.5A, 5A, 3A, 1.5A LOW DROPOUT POSITIVE ADJUSTABLE REGULATORS

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3.3 - 2

3.3

OM183SC - OM186ST - OM186SR

ELECTRICAL CHARACTERISTICS (T

C = 25°C unless otherwise noted)

Parameter

Conditions

Min.

Typ.

Max.

Units

Reference Voltage

I

OUT = 10 mA, Tj = 25°C

(V

IN - VOUT) = 3 V

1.238

1.250

1.262

V

10mA ≤ IOUT ≤ IFULL LOAD

1.5 V ≤ (VIN - VOUT) ≤ 25 V (Note 3)

1.220

1.250

1.270

V

Line Regulation

I

LOAD = 10 mA, 1.5 V ≤ (VIN - VOUT) ≤ 15 V,

0.015

0.2

%

T

j = 25°C

0.035

0.2

%

15 V ≤ (VIN - VOUT) ≤ 35 V (Notes 1 & 2)

0.05

0.5

%

Load Regulation

(V

IN - VOUT) = 3 V

10 mA ≤ IOUT ≤ IFULL LOAD

T

j = 25°C

0.5

0.8

%

(Notes 1, 2, 3)

.8

1.0

%

Dropout Voltage

∆VREF = 1%, IOUT = IFULL LOAD

1.3

1.5

V

Current Limit

OM183SC

(V

IN - VOUT) = 5 V

8.0

A

(V

IN - VOUT) = 25 V

0.4

A

OM184SC

(V

IN - VOUT) = 5 V

5.5

A

(V

IN - VOUT) = 25 V

0.3

A

OM185ST/SR

(V

IN - VOUT) = 5 V

3.2

A

(V

IN - VOUT) = 25 V

0.2

A

OM186ST/SR

(V

IN - VOUT) = 5 V

1.5

A

(V

IN - VOUT) = 25 V

0.75

A

Minimum Load Current

(V

IN - VOUT) = 25 V

5

10

mA

Thermal Regulation

T

A = 25°C, 30 ms pulse

OM183SC

Guaranteed by design

0.002

0.01

%/W

OM184SC

0.003

0.15

%/W

OM185ST/SR

0.004

0.02

%/W

OM186ST/SR

0.010

0.05

%/W

Ripple Rejection

f = 120 Hz

C

ADJ = 25 µF Tantalum

I

OUT - IFULL LOAD (VIN - VOUT) = 3 V

60

75

dB

Adjust Pin Current

T

J = 25°C

55

µA

Adjust Pin Current Change

10mA ≤ IOUT ≤ IFULL LOAD

1.5 V ≤ (VIN - VOUT) ≤ 25 V

0.2

5

µA

Temperature Stability

-55°C ≤ TJ ≤ +150°C

0.5

%

Long Term Stability

T

A = 125°C, 1000 Hrs.

0.3

1

%

Thermal Resistance

Junction-to-Case

TO-257AA/D2 Pac

4.2

°C/W

TO-258AA

2.75

°C/W

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 (OM183/60W, OM184/45W, OM185/30W,

OM186/15W). 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.

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