4

LT1580/LT1580-2.5

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

q

0.10

0.17

V

q

0.15

0.22

V

0.34

0.40

V

q

0.50

V

0.54

0.62

V

0.70

0.80

V

0.70

0.80

V

q

0.10

0.17

V

q

0.15

0.22

V

q

0.26

0.38

V

0.34

0.40

V

q

0.50

V

0.54

0.62

V

0.70

0.80

V

0.70

0.80

V

ELECTRICAL CHARACTERISTICS

temperature range.

Note 2: For the LT1580, dropout is caused by either minimum control

are specified with respect to the output voltage. The specifications represent

the minimum input/output voltage required to maintain 1% regulation.

Note 3: For the LT1580 adjustable device the minimum load current is the

minimum current required to maintain regulation. Normally the current in

the resistor divider used to set the output voltage is selected to meet the

minimum load current requirement.

Note 4: The control pin current is the drive current required for the output

transistor. This current will track output current with roughly a 1:100 ratio.

The minimum value is equal to the quiescent current of the device.

OUTPUT CURRENT (A)

0

1.0

0

1

5

7

1580 G03

4

2

3

6

0.5

DATA SHEET LIMIT

INDICATES GUARANTEED TEST POINTS

0

OUTPUT CURRENT (A)

0

2

0

1

5

7

1580 G02

4

2

3

6

1

DATA SHEET LIMIT

INDICATES GUARANTEED TEST POINTS

0

Dropout Voltage —

Minimum Power Voltage

Control Pin Current

vs Output Current

OUTPUT CURRENT (A)

0

140

120

100

80

60

40

20

0

35

1580 G01

12

46

7

DATA SHEET LIMIT

TYPICAL

DEVICE

INDICATES GUARANTEED TEST POINTS

0

Minimum Control Voltage