5

LT1761 Series

OUTPUT CURRENT (mA)

500

450

400

350

300

250

200

150

100

50

0

1761 G01

0

102030 40

50 60 70

80 90 100

= TEST POINTS

TEMPERATURE (

°C)

–50

100

1761 G03

050

40

35

30

25

20

15

10

5

0

–25

25

75

125

TEMPERATURE (

°C)

–50

100

1761 G06

050

1.84

1.83

1.82

1.81

1.80

1.79

1.78

1.77

1.76

–25

25

75

125

Guaranteed Dropout Voltage

Quiescent Current

LT1761-1.8

Output Voltage

Dropout Voltage

TEMPERATURE (

°C)

–50

0

50

75

1761 G01.1

–25

25

100

125

500

450

400

350

300

250

200

150

100

50

0

OUTPUT CURRENT (mA)

500

450

400

350

300

250

200

150

100

50

0

1761 G00

0

102030 40

50 60 70

80 90 100

Typical Dropout Voltage

Note 4: Operating conditions are limited by maximum junction

temperature. The regulated output voltage specification will not apply for

all possible combinations of input voltage and output current. When

operating at maximum input voltage, the output current range must be

limited. When operating at maximum output current, the input voltage

range must be limited.

Note 5: To satisfy requirements for minimum input voltage, the LT1761

(adjustable version) is tested and specified for these conditions with an

external resistor divider (two 250k resistors) for an output voltage of

2.44V. The external resistor divider will add a 5

µA DC load on the output.

Note 6: Dropout voltage is the minimum input to output voltage differential

needed to maintain regulation at a specified output current. In dropout, the

ELECTRICAL CHARACTERISTICS

(whichever is greater) and a current source load. This means the device is

tested while operating in its dropout region or at the minimum input

voltage specification. This is the worst-case GND pin current. The GND pin

current will decrease slightly at higher input voltages.

Note 8: ADJ pin bias current flows into the ADJ pin.

Note 9: SHDN pin current flows into the SHDN pin.

Note 10: Reverse output current is tested with the IN pin grounded and the

OUT pin forced to the rated output voltage. This current flows into the OUT

pin and out the GND pin.

Note 11: For the LT1761, LT1761-1.5, LT1761-1.8 and LT1761-2 dropout

voltage will be limited by the minimum input voltage specification under

some output voltage/load conditions. See the curve of Minimum Input

Voltage in the Typical Performance Characteristics.

TYPICAL PERFOR A CE CHARACTERISTICS

TEMPERATURE (

°C)

–50

100

1761 G51

050

1.528

1.521

1.514

1.507

1.500

1.493

1.486

1.479

1.472

–25

25

75

125

LT1761-1.5

Output Voltage