LD1085D2T33 datasheet(12/27 Pages) STMICROELECTRONICS

Part #	LD1085D2T33

Description	3A Low drop positive voltage regulator adjustable and fixed

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Electrical characteristics

LD1085 series

12/27

Table 9.

Electrical characteristics of LD1085#

(VI=4.25V, CI = CO =10μF, TA = -40 to 125°C, unless otherwise specified).

Symbol

Parameter

Test

Min.

Typ.

Max.

Unit

VO

Output voltage (1)

IO = 10mA TJ = 25°C

1.237

1.25

1.263

V

IO = 10mA to 3A, VI = 2.85 to 30V

1.225

1.25

1.275

V

ΔVO

Line Regulation

IO = 10mA, VI = 2.85 to 16.5V,

TJ = 25°C

0.015

0.2

%

IO = 10mA, VI = 2.85 to 16.5V

0.035

0.2

%

ΔVO

Load Regulation

IO = 10mA to 3A, TJ = 25°C

0.1

0.3

%

IO = 0 to 3A

0.2

0.4

%

Vd

Dropout Voltage

IO = 3A

1.3

1.5

V

IO(min)

Minimum Load Current

VI = 30V

3

10

mA

Isc

Short Circuit Current

VI - VO = 5V

5.5

6.5

A

VI - VO = 25V

0.5

0.7

A

Thermal Regulation

TA = 25°C, 30ms pulse

0.003

0.015

%/W

SVR

Supply Voltage Rejection

f = 120 Hz, CO = 25µF,CADJ = 25 µF,

IO = 3A, VI = 6.25 ± 3V

60

72

dB

IADJ

Adjust Pin Current

VI = 4.25V, IO = 10 mA

55

120

μA

ΔIADJ

Adjust Pin Current Change (1)

IO = 10mA to 3A, VI = 2.85 to 16.5V

0.2

5

μA

eN

RMS Output Noise Voltage (%

of VO)

TA = 25°C, f =10Hz to 10KHz

0.003

%

S

Temperature Stability

0.5

%

S

Long Term Stability

TA = 125°C, 1000Hrs

0.5

%

1.

See short-circuit current curve for available output current at fixed dropout.

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