LT1761ES5-5(RevA) Ver la hoja de datos (PDF) - Linear Technology

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LT1761ES5-5
(Rev.:RevA)

100mA, Low Noise, LDO Micropower Regulators in SOT-23

Linear Technology 

LT1761 Series

ELECTRICAL CHARACTERISTICS

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 5µA 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

output voltage will be equal to: VIN – VDROPOUT.

Note 7: GND pin current is tested with VIN = VOUT(NOMINAL) or VIN = 2.3V

(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

Typical Dropout Voltage

500

450

400

350

TJ = 125°C

300

250

200

TJ = 25°C

150

100

50

0

0 10 20 30 40 50 60 70 80 90 100

OUTPUT CURRENT (mA)

1761 G00

Quiescent Current

40

VIN = 6V

35 RL = ∞ (250k FOR LT1761-BYP, -SD)

IL = 0 (5µA FOR LT1761-BYP, -SD)

30

25

VSHDN = VIN

20

15

10

5

0

–50 –25

VSHDN = 0V

0 25 50 75

TEMPERATURE (°C)

100 125

1761 G03

Guaranteed Dropout Voltage

500

= TEST POINTS

450

400

350

TJ ≤ 125°C

300

250

TJ ≤ 25°C

200

150

100

50

0

0 10 20 30 40 50 60 70 80 90 100

OUTPUT CURRENT (mA)

1761 G01

LT1761-1.5

Output Voltage

1.528

IL = 1mA

1.521

1.514

1.507

1.500

1.493

1.486

1.479

1.472

–50 –25

0 25 50 75

TEMPERATURE (°C)

100 125

1761 G51

Dropout Voltage

500

450

400

350

IL = 100mA

300

250

200

IL = 50mA

150

IL = 10mA

100

IL = 1mA

50

0

–50 –25

0 25 50 75

TEMPERATURE (°C)

100 125

1761 G01.1

LT1761-1.8

Output Voltage

1.84

IL = 1mA

1.83

1.82

1.81

1.80

1.79

1.78

1.77

1.76

–50 –25

0 25 50 75

TEMPERATURE (°C)

100 125

1761 G06

5

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