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LT1085-05-220M

LOW DROPOUT 3 AMP POSITIVE VOLTAGE REGULATOR

Semelab - > TT Electronics plc  

LT1085–220M–05

LT1085–05–220M

LT1085–12–220M

MILITARY VERSION

ELECTRICAL CHARACTERISTICS (TJ = –55 to +150°C unless otherwise stated)

Parameter

Output

Voltage Test Conditions

Min. Typ. Max.

ICL

Current Limit

IQ

Quiescent Current

VIN – VOUT = 5V

VIN – VOUT = 25V

5

VIN £ 20V

12 VIN £ 25V

TJ = –55 to 150°C 3.2

4

TJ = –55 to 150°C 0.2 0.5

TJ = –55 to 150°C

5

10

TJ = –55 to 150°C

5

10

Minimum Load Current 4

ADJ. VIN – VOUT = 25V

TJ = –55 to 150°C

5

10

REG(THERM) Thermal Regulation

TP = 30ms

TA = 25°C

0.004 0.02

RA

Ripple Rejection

5 TJ = –55 to 150°C

VIN = 8V

60

68

12 COUT = 25mF Tantalum VIN = 15V

54

60

ADJ.

f = 120Hz

IO = 3A

VIN – VOUT = 3V

CADJ = 25mF

60

75

IPIN

Adjust Pin Current

ADJ.

TJ = –55 to 150°C

55

120

DIPIN Adjust Pin Current Change

ADJ.

VIN – VOUT = 1.5 to 15V

IO = 10mA to 3A

TJ = –55 to 150°C

0.2

5

TS

Temperature Stability

TJ = –55 to 150°C

0.5

Long Term Stability

TA = 125°C

T = 1000 Hrs

0.3

1

VN

RMS Output Noise

f = 10Hz to 10kHz

TA = 25°C

0.003

RqJC Thermal Resistance

Control Circuitry

TBA

Junction – Case

Power Transistor

TBA

Unit

A

mA

%/W

dB

mA

mA

%

%

%

°C/W

Notes:

1. See thermal regulation specifications for changes in output voltage due to heating effects. Load and line regulation are

measured at a constant junction temperature by low duty cycle pulse testing. Load regulation is measured at the output

lead » 1/8” from the package.

2. Line and load regulation are guaranteed up to the maximum power dissipation of 30W. 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.

3. Dropout voltage is specified over the full output current range of the device.

Semelab plc. Telephone +44(0)1455 556565. Fax +44(0)1455 552612.

E-mail: sales@semelab.co.uk Website: http://www.semelab.co.uk

Prelim. 10/95

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