4

LT1962 Series

TYPICAL PERFOR A CE CHARACTERISTICS

OUTPUT CURRENT (mA)

0

150

200

250

150

250

1962 G01

100

50

0

50

100

200

300

350

400

300

OUTPUT CURRENT (mA)

0

0

100

200

300

50

100

150

200

1962 G02

250

400

500

50

150

250

350

450

300

= TEST POINTS

TEMPERATURE (

°C)

–50

350

25

1962 G03

200

100

–25

0

50

50

0

400

300

250

150

75

100

125

Typical Dropout Voltage

Guaranteed Dropout Voltage

Dropout Voltage

Quiescent Current

TEMPERATURE (

°C)

–50

0

5

15

20

25

50

35

0

50

75

1962 G04

10

40

45

30

–25

25

100

125

/2.5/-3/-3.3/-5)

Note 5: 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 6: To satisfy requirements for minimum input voltage, the LT1962

(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 7: Dropout voltage is the minimum input to output voltage differential

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

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

ELECTRICAL CHARACTERISTICS

tested while operating in its dropout region. This is the worst-case GND

pin current. The GND pin current will decrease slightly at higher input

voltages.

Note 9: ADJ pin bias current flows into the ADJ pin.

Note 10: SHDN pin current flows into the SHDN pin. This current is

included in the specification for GND pin current.

Note 11: 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 12: For the LT1962, LT1962-1.5 and LT1962-1.8 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. For other fixed voltage versions of

the LT1962, the minimum input voltage is limited by the dropout voltage.

LT1962-1.5 Output Voltage

LT1962-1.8 Output Voltage

TEMPERATURE (

°C)

–50

125

1962 G05

0

50

100

–25

25

75

1.532

1.524

1.516

1.508

1.500

1.492

1.484

1.476

1.468

TEMPERATURE (

°C)

–50

125

1962 G06

0

50

100

–25

25

75

1.836

1.827

1.818

1.809

1.800

1.791

1.782

1.773

1.764